Doug, it's always a pleasure to see your meticulous work restoring these venerable old amps and giving them a new lease of life with really simple fixes. Makes me wonder how many modern digital devices will still be running in fifty-six years. I don't imagine anyone will be replacing FPGA chips in 2077, all those broken Kempers will be in landfill and I imagine the 1965 Fender Deluxe will just need another recap.
It doesn't take much corrosion from humidity to destroy most modern devices with surface PCB mounted components. I left a cheap pedal in my garage tool chest for 9 months by mistake. That was enough to ruin it. I get the feeling modern products are designed with the land fill in mind.
The chassis plater must have put that batch in and then took a long lunch. Lol. I was yelling "check the 5y3" I can't believe you couldn't hear me. Good to see you back on the tube.
Excellent video Uncle Doug !! I will/can use this as a reference for years to come. I love this amp !! I purchased one used in 1980 - and it has been my amp of choice ever since !! Especially loved the troubleshooting methodology on the reverb and tremolo circuits !! {:>)
Another master class from Uncle Doug. Always appreciate the sharing of your knowledge in maintaining this era of sound reproduction for musicians - still unbeatable, to my ears at least.
I miss your preliminary cat scans of all incoming items. Someone is slacking off. In all seriousness thanks for your educational uploads. Your explanation while going through the schematic helps me understand immensely.
Man, I got more out of your Tweed talk than I have gotten together on my own in years. Better understanding circuits vs "well, let's see what this does" is a step forward.
Gidday uncle Doug! Well done mate! Finally, someone on yt has given a full & proper explanation of the correct, SAFE method of connecting up the incoming mains power through to the power transformer! I'm so glad it was you! 😊👏👏👏! You fault finding procedure was clear & precise, & I especially liked your 'trick' of hooking up your test speaker to the reverb driver transformer output to test that stage. What a great idea! It's a shame a new tank was required though, but I guess reverb tank output transformers are just too tiny & fragile to try to work on aren't they? The very few I've seen appear to be, with ridiculously fine wires, & glued-in little magnets in them that may need careful alignment & calibration. They're not expensive so a replacement was the wisest choice, despite you having found the broken wire on the input side. I was just wondering if the customer may have requested an EARTHED mains auxillary output socket as well as the removal of the death capacitor, he wasn't very clear on this. I really liked your analysis & discussion of the development of the Fender circuit over the models too. Another stellar video of yours that I could easily watch again!
Thanks so much, Neville. The only unobtrusive way to provide a grounded auxiliary output is to use an intermediate 3 to 2 prong adapter with a ground wire to connect to the chassis. So few people use the auxiliary outlet that it is rarely an issue
Always happy to see a new vid pop up from you...I've been gigging with a 1965 Bandmaster head and it's just fantastic... amazing how almost all the gear from that era (and before) was just so 'right'
Great teaching moments indeed. I just checked my MIM footswitch and sure as $hit, it came from the factory with the sticker turned upside-down lol. I came here looking for the fix for the VIB ticking issue and hit like and subscribe. Great video in all respects!!
Fascinating. I have a question about the ac receptacle socket. After you’ve done the three wire cord and used the receptacle as a sort of terminal strip, the socket doesn’t work, right? Is there any danger from someone plugging something in to the receptacle socket? I an imagine a user down the line not knowing it is being used for a different purpose and plugging something into it.
I have a friend with a pre CBS no logo '64 Blackface Deluxe Reverb, basically 100% original with the exception of the speaker, it was replaced with an Oxford. The volume pots are dirty and it could be quieted in the hum department. Would $300-$400 be a reasonable ballpark for a good tech to go over it, and address these issues?
this amp sounds very nice ,enjoyed the video especially the troubleshooting on tremola and reverb very good info here ,thanks Uncle Doug for another awesome video!!!
Uncle Doug was right about if you wait, it will cost you more. Here we are in July 2024 and I can't seem to find a clean one for under 4 grand! Will it keep going? Will these be $10,000 amps in a few years?? Buy now or be priced out forever!!! Just like real estate.
Going to save for when I'm tucked in tonight ... on opening it UA-cam asked why I'd like the video ... I selected Informative, Entertaining and Calming. Your videos do sooth me.
Speaking of MOD’s, if you were an angst filled, rebel without a cause teenager and you lived in Brighton in the mid ‘60’s, would you be a Rocker or a Mod, Uncle Doug?
three of my paintings. cats can up and die on you unexpectedly~ life does not come with an instruction manual~ Spats was rigomortis dead in a week, maybe all cats ...perhaps ole Jack~? this is a superb amp, note heavy/size of x-former=cost and weight~surprised thermal changes do not screw with construction of glue/wire over time~
Uncle Doug My Man - You are the shit - your amp knowledge is killer. I barely understand 95% of what you are talking about electronically, I'm just a guitarist who loves Valve amps, but it is all super fascinating to observe and watch. I wish I was in Texas talking to you right now - Away, Away, Away!!! Thanks from Scotland - I wish I had a sack of vintage American/European valves (and no Death Caps!) to donate to you, so you can continue your amplifier, Howard Carter style archeological digs. - My major respect to you, you somewhat unsung genius/hero - Alex Kennedy (With every best wish I can muster). Cheers Doug. Come back at me.
Sung to the tune of “Rubber Ducky”: Uncle Dougie, you’re the one You make amp builds lots of fun Uncle Dougie, I’m awfully fond of you Uncle Dougie, joy of joys Your amplifiers make such great noise Jack and Ollie, seem to like you too Oh, every day when I make my way to the UA-cam I find a fellow that teaches great and has a voice that is so smooth (tube-tube-ta-tube) Uncle Dougie, never wastes my time Deluxe Reverb, what a find! Uncle Dougie I’m awfully fond of you
I did the exact same testing procedure for the reverb of my 1966 Deluxe Reverb. When I rattle the reverb tank manually I can hear the same sounds as you have at minute 35:19 BUT when I plug in a guitar and try it there comes no reverb... do you have a hint for me?! THANKS!!
Yes, indeed, SM. Shaking the tank is a good way to test the output from the tank to the 12AX7 triode, but not necessarily a good way to assess the input of the signal from the reverb driver to the tank. Both the input from the 12AT7 driver and the output to the 12AX7 grid must be fully operational.
Fat power transformer. 5u4 driver grade? I’ve never tested one at higher than 20w clean with 6v6gt or 6v6s JJs. 25w clean (obviously limit of output transformer) with 5881s at 4 ohms.
Hi: Amp biasing question for you - I am repairing a 1967 Fender Bassman AA165 circuit. The amp wants to see a 4 ohm speaker load. So, can I set the bias using an 8 ohm speaker load or do we really need 4 ohms to get the bias correct? Asking because all of my speaker cabs are 8 ohms. Could rig something up however. Thank You!
Doug, don't forget that Humbuckers did not become available on 'Spanish' guitars until 1957, on steel guitars in 1956. The earlier Fenderamps did not need to be designed to handle these pickups. On the other hand, Gibson P-90s do not have as much output voltage as humbuckers but have significantly more then Fender single coil pickups.
I saw this posted this morning and it's been killing me that I can't watch it until tonight. 90 minutes of Uncle Doug goodness! I was hoping that amp repair would get me all of the chicks, lol
You know what's really ironic? I know of Rob Robinette from years and years ago. Mid 90s. He had a personal Corvette website that he kept with all sorts of great info on it. I remembered the name because it wasnt normal. You don't see Rob Robinette Corvette a lot. It was even across his windshield. Pretty sure it was a C4. This would've been around 1995. Cars & racing have been my passion since I was 15. The only thing that's drawn me away from it is guitars lol. I'm an automotive tech by trade, as well. Or I was. A personal loss sorta ended that. Just don't have the patience anymore. Fast Forward 24 years later, to 2019, when I start playing guitar and I start seeing his name quite a bit among my Google results while searching for different info. I was shocked, to say the least lol. One thing I knew from his Corvette website was he always had good info. So I had no problems reading his site for guitar & amp info. As a matter of fact, I was just there yesterday lol
The reverb tank input transformer is 8 ohm AC impedance not DC resistance... and the output recovery transformer should be approx. 175 ohm DC resistance. Also, a dead reverb is most of the time due to a broken wire inside the tank or one of the RCA connectors oxided or with break in the shielded cables. IMPORTANT: the reverb output transformer could be damaged when driven with an open load.
Hi Uncle Doug. Congratulations on reaching 💯K subscribers. A real testament to your hard work, expertise and high quality content. When I studied electronics, valves /tubes were off the curriculum. Your videos have really helped me increase my knowledge in this area. Thank you !
Hello there Uncle Doug, I was wondering if you could help an amateur out with circuit bending electronics. Do you know any good resources to brush up on reading material? I'm wanting to learn how to create PCB boards with patches for synthesizers and taking apart old electronic music toys from the 90s. I actually worked at a wire harness factory, soldered constantly and learned how to read blueprints. I'm familiar with diodes, capacitors, resistors, etc. I am no where near the experience or mastery of you, however! Hope all is well, brother.
no wonder Blackfaces are so expensive~ takes a fashion to put 'em right~ the reworked XL-40 is the same way~ still did not put a three wire plug, ran an auxiliary output past the input, was noisy~ smartypants ain't sharing the schematic, says look at their site~ foam prevented the feedback, was not the TO-3 which this particular one does not even have~
Hi Uncle Doug. Did you caution viewer’s about the potential for stored electricity in the filter caps? When I change caps out I always discharge the caps to ground I assume you already did this.
Very nice vid as usual. Love the methodology. Wonder about another effect of increasing the second node resistor in the power supply. It should also give less ripple to, and thus less hum from the pre-amp stages. And wow, those cats can play! I notice a big improvement over the last few years there in the audio demonstration performances!
Hello Uncle Doug. A good friend gave me a 64 Deluxe Reverb. Hasn’t been used in 30 years. Has all the original RCA tubes in it. I dont even want to plug it in. Would you be willing to go thru it for me?
Wow, what a great gift !! I'd be glad to tune it up, WG, but I'm currently coping with a back log of repair work. Please give me a few weeks to catch up and then contact me again by PM on my FB page Uncle Doug's Vintage Amps. Thanks.
Who knew that Jack was an illegal Canadian immigrant? Thanks, Uncle Doug, and all borders should be open to cats, no matter their nation of origin. I'm also a dog fan. (One of each species at present.)
Is that cloth covered wire or is it asbestos and cloth covered wire, making it illegal for modern safety standards! 1965 that coveted asbestos covered wire should go jest like the old capacitors, and the two prong cord, sorry jest saying.
Hi Doug! I would actually replace the awful RCA tremolo switch connector with a 1/4" connector with a built-in switch, so the footswitch is not needed to use the tremolo. The switch also would then use two different plugs for the tremolo and the reverb, so that there is no chance to switch them around.
Hi Uncle Doug...In your educated opinion, are radial caps as good as the axial types and do you think they will hold up for years , or are they not as good. I see they are much smaller which may or may not keep down noise etc. Many thanks for great videos, one can actually learn to build an amp from watching your clips.
Hello sir, this is a bit off subject but I bought a Premier Twin-8 amp from you years ago and i’m in the process of trying to sell it! I keep getting asked what year it is but i’m not sure! I only have the serial number and not sure if the date code might be somewhere inside. Not wanting to take it apart. Would you happen to remember the little amp and have an idea what year it is or maybe help me figure out what year it is? Thanks for any info and keep up the great work here! John in El Paso
Uncle Doug, I was wondering if you could give me some insight on something? Is there any place where I can do one stop shopping for amp repair parts? Seems like I have to shop at a couple of different places online to get certain parts. I’m finding that I have to fill my orders in 2 or 3 locations and this drives up the total shipping cost, along with the delivery times.
Understood, HH. I buy all my components from Antique Electronic Supply or Mojotone. Both offer exceptional service, good prices, and reasonable shipping.
The owner said nothing about changing switches or changing original power cords , you started doing that before you even heard back from him, what if he wanted to keep it original
When arranging to send amps to me for repair, the owners and I discuss their wishes. Certain requests, like significantly changing a classic vintage circuit, are rejected, while reasonable, rather unobtrusive changes are agreed upon. This was done before the amp was shipped and the video begun.
Just came across this deep dive into the technical side behind the EVH amps, etc which I thought you might find interesting: ua-cam.com/video/aKejQ1WBybA/v-deo.html
Thanks so much for the wonderful videos, the "part 2" feature where you delve into the circuit changes and differences in recent videos is like finding gold for me! Please keep it up, no one has helped me understand the changes Fender made through the years and the benefits/drawbacks of each better than you!
25 watts is PLENTY of sound these days.. most gigs ive done in the blues band im in im told to turn it down all the time. As one does to guitar players.. And thats with a 12 watt or so princeton.. hehe
I guess it depends on the size of the venue and the rudeness of the audience, Scott. You have to be a lot louder in a room full of drunks than in a church ;)
Doug, should not the fuse come before the on/off switch? Your way, you are not protected by an internal fault of the switch to chassis. Only the service breaker. Hope you rethink this. I would connect the main (black) conductor to the back of the fuse holder.
Nope. Have you EVER had a toggle switch short to the chassis? In 40+ years, I have not. On the other hand, can you envision someone switching off an amp (wired like you propose) and checking the fuse....only to be electrocuted? I'll play the odds, Mr. Moose, and go for safety rather than conventional ""wisdom". Thanks for your input.
@@UncleDoug Doug I understand your position. The National Electric Code considers the "plug" the equipment disconnect for regulatory compliance. In my company our required design policy was always Plug > Fuse > Switch for Ground Support Equipment design. I just followed our requirements in my designs, but never researched the safety codes that may have driven it. I just sent a note to a friend of mine on a IEEE committee that deals with such things, asking for his opinion and any relevant regulatory requirements. If he gets back to me, I will share his insight, one way or the other. While I wait for his response, I would recommend to all reading this to look up ANY Tektronix schematic for plug connected equipment. There are free schematics all over the net for the vintage gear. (A good one are the TM502A, TM503, TM504, TM506, TM5006 Power Racks) You will find that all are Plug>Fuse>Switch. All the best, theBigMoose
@@theoldbigmoose Thanks so much for your follow up comments, Moose. Since I am not a manufacturer, I can rely on common sense rather than (often poorly conceived) rules established by bureaucrats.....but guitarists and amps are a unique group. Imagine a scenario in which an amp suddenly goes dead during a public performance. The guitarist quickly puts one hand on the chassis and unscrews the fuse cap with the other.....reaching for the exposed end of an unblown fuse......ZAP.....end of the show.
@@UncleDoug I do hear you, and of course you are free to redesign for your customers as you desire. However, a properly designed fuse holder will disconnect the fuse from the end (tail) connector before the front fuse cap connector is exposed. The line (black wire) should be connected to the back, or "tail" connector of the fuse holder for this reason. I know it won't mean much but I had to design reliability using MIL-STD-217, and toggle switches do not have a 0.0 failure rate. (Section 14.1 of MIL STD 217 for toggle switch in ground mobile applications has a failure rate of ~5.7 per 10^6 hours of use) A NAVSEA addendum states: "Switches are considered relatively high failure rate items due to the moving parts and the wear-out mechanisms. Vendors often specify switch reliability by giving a maximum number of switching sequences rather than a rate of failure with time. Reliability is further decreased as temperature rises and adverse chemical reactions from internal materials are accelerated. In addition, the insulation resistance between the switch contacts and ground decreases as the temperature rises. High temperature can also affect the insulation from the standpoint of voltage breakdown, due to a change in dielectric strength. At the opposite extreme, switch reliability can be degraded by low temperatures. Low temperatures can cause material contraction and cracking, allowing foreign material and moisture to enter resulting in short circuits voltage breakdowns, and corona arcing. " Of the data NAVSEA collected for toggle switches, 65% failed in SHORT, 16% failed by STICKING, and 19% failed with a parameter change (internal resistance.) Edit: As promised, I just received the reply from my friend in IEEE, shared below: "Hi yyyyy: There is no requirement for the sequence, fuse-switch or switch-fuse. I recommend fuse-switch as this sequence protects against some kinds of switch failure as well as the wiring to the switch. Likewise, there is no requirement (some will argue against this point) that a fuse be in the "hot" wire. However, I recommend the fuse be in the "hot" wire as this protects against ground faults as well as load faults. (The breaker in the installation is always in the "hot" wire and protects against both load faults and ground faults.) Note that in two-wire non-polar equipment, the fuse can be in "hot" or neutral wire depending on plug insertion orientation. Best wishes for the New Year! xxxxx" All the best, bigMoose
They have hand-held Laser Units that will get that rust off in a much more genteel way than most of us are accustomed to ua-cam.com/users/results?search_query=cleaning+laser+rust
According to some research done years ago by Bell Labs, gold connectors should not be used with non-gold receptacles because the dissimilar metals can result in electrolytic corrosion.
Hi Uncle Doug, I want to build my 1rst 5F1, and shopping around at the swap meet, I found a small chasis with a heavy transformer and 2 5Y3 tubes. Do you think that transformer is the right one for my project? I suspect that’s a power source of something similar.
I really can't guess if an unseen transformer is appropriate, Sal. The fact that it has two rectifiers is rather strange. Perhaps it was for a very high wattage amp.
Hi Uncle Doug, any reason you don't show you doing actual work on the amps? I'd personally love to see your technique. I've noticed you have a Weller soldering gun by your bench, is that your go to? I only personally use it for heavy jobs like soldering to chassis.
1.) Since I use a handheld camera, it's hard to work with only the one remaining hand. 2.) Showing the actual work process rather than each completed step would extend the video length at least 2 or 3 times. 3.) My hands are plagued with both arthritis and severe carpal tunnel issues, and the physical manipulations are often performed slowly and with difficulty. I do use the Weller gun almost exclusively. I have irons, but prefer the gun.
46:33 I hope this isn't too confusing. I believe originals were Vib left - Rev right with cable TOWARDS player, whereas reissues (like this one) are now available Vib left - Rev right with cable running AWAY from player. So, this one is wired like original but labelled like reissue - hence the "backwardness". Myself, I have a reissue '68, the footswitch was like original (Vib left - Rev right with cable towards me). I prefer cable going away from me, so instead of having to read the darn thing upside down all the time, I removed the label, created a very convincing replacement which now reads Rev left - Vib right, with the cable running away from me. There's probably been a demand for this (cable away from player), hence the reissues being built/labelled this way. But yeah, they should make SURE they wire them correctly! lol Btw, had you "simply" flipped the label around like some suggested, this would have run the cable towards you! Yuck! Great work Uncle Doug!! I soooo wish you lived closer to me - Eastern Ontario.
The real consideration, Mark, is that the reverb line to the footswitch must be shielded, since it carries signal. The tremolo line is simply a ground and need not be shielded.
@@UncleDoug Yup, saw that (and just checked mine to be sure). It was/is correctly wired, I just prefer the cable running away from me, not towards me. My new "custom" label matches the wiring, I simply had to reverse it...and so it reads Rev LF - Vib RT instead of the "standard" Vib LF - Rev RT...with the cable now running away from me of course.
***100 THOUSANDS SUSCRIBERS**** A wholeheartedly congrats to our favorite Uncle of the whole internet! Thanks for this channel UD, I speak for all 100 k of us. I celebrate you found success these years, unfortunately in the meantime this platform became another example of everything that is wrong with the world nowadays. Still the 100k silver button you can wear with pride, as those buttons are a recognition that represent the audience, not the platform. No matter they shape them in the now evil corporation's logo. Please let us know if you would plan migrate this channel to another platform like Gab TV, I will follow wherever it goes and also would subscribe or even pay whatever subscription necessary to be able to sit back, relax and see a 1959 mint condition Fender amp receive the UD treatment. Thanks again, keep on rocking. Best of luck ahead for you and your family! Kilovolver.
Thanks so much for all your very nice and informative comments, K. We'll stay put for now, but I'm not pleased with the idea of YT inserting advertising without the channel owner's permission.
@@UncleDoug Sorry if my rant overshadowed what I really wanted to say: BIG CONGRATS and much success! from now on 1 million subs is a cakewalk! Thanks for all UD
Hi every body: I bought a new 65 Princeton Reverb amp a while ago, a limited edition with a 12" speaker. Shortly( within 2 hrs of first use), amidst crackling and nasty noises, the tremolo conked out. Of course I quickley unplugged everything and started all reconnections with different guitar and cord. The amp worked just fine( no funny noises) and still does. However, tremolo is dead. all elese works. Could this be simpley a tube or ??? Thanks for any help.
P.s. I'm an old guy and do not play any overdrive or loud music. Amp is in the same place all the time. Returning it to vendor would have been a huge pita!
It could be the oscillator tube, John, but it's impossible to diagnose long distance. If it's on warranty, I would have it repaired by a qualified tech.....pita or not ;)
One thing is confusing me: at 35:10 when you shake the tank it seems to be producing output; crashing of springs is heard. Then at 43:15 you find the output transducer has failed open circuit. How can I reconcile these two seemingly contradictory findings?
Mr. Carlson once corrected someone that the 5B3 is not called grid leak bias but “Initial Velocity Bias” but didn’t explain anything past that. Any insight for the common man? Perhaps I’m mistaken? 🤷🏻♂️
I assume I'm not the only person to hope that lots of things are wrong with the amp so the video is longer?
I appreciate the thought, Daniel, but these videos are getting pretty darn long as it is. The next one to be posted is almost 90 minutes !!!
@@UncleDoug 90 minutes is pretty long, but that just means we gain more of your knowledge in one video. Luvin' it.
@@UncleDoug I'll be waiting for that one as I'll bring my laptop upstairs in the kitchen while I cook supper ;=))
@@UncleDoug 👍 😎
Don't care how long they are!!
Uncle Doug, you are a national treasure. Even international, should I say. Greetings from Italy
Wow....thanks so much, Giuseppe :)
Likewise, from Somerset UK via Scotland. All the best to you and yours, from mine and me, U Doug. Rab 🍻 😎
Totally agreeing here in Enschede, the Netherlands
Uncle Doug, I enjoy every video. I have learned a lot with you. Thanks a lot. Greetings from Argentina
Greetings from Regensburg, Germany!
Doug, it's always a pleasure to see your meticulous work restoring these venerable old amps and giving them a new lease of life with really simple fixes. Makes me wonder how many modern digital devices will still be running in fifty-six years. I don't imagine anyone will be replacing FPGA chips in 2077, all those broken Kempers will be in landfill and I imagine the 1965 Fender Deluxe will just need another recap.
I tend to agree, Frank, and it's one reason that I work on them......they deserve it ;)
It doesn't take much corrosion from humidity to destroy most modern devices with surface PCB mounted components.
I left a cheap pedal in my garage tool chest for 9 months by mistake. That was enough to ruin it.
I get the feeling modern products are designed with the land fill in mind.
The chassis plater must have put that batch in and then took a long lunch. Lol. I was yelling "check the 5y3" I can't believe you couldn't hear me. Good to see you back on the tube.
Another great video. No wonder they call you Sherlock Ohms.
Thanks, Brendan. That's a good one :)
or.......Dr Watts son.
I love your videos .
Thanks, Moss.
@moss1transcendant Me to 😉
Uncle Doug oh I see you've been experienced, not necessarily stoned but beautiful.
"" it's flashing like a Jimi Hendrix concert in there" lol
The little bug in the bedroll has some wild parties :)
Excellent video Uncle Doug !! I will/can use this as a reference for years to come. I love this amp !! I purchased one used in 1980 - and it has been my amp of choice ever since !! Especially loved the troubleshooting methodology on the reverb and tremolo circuits !! {:>)
Thanks so much, Donald. It's great to hear that the video was helpful and informative :)
Another master class from Uncle Doug. Always appreciate the sharing of your knowledge in maintaining this era of sound reproduction for musicians - still unbeatable, to my ears at least.
Thanks so much, Spud.
I live in Ohio, and all I got sent was a Solid State Crate!! But I fixed it anyway.
Somebody had to do it, DK :)
I miss your preliminary cat scans of all incoming items. Someone is slacking off.
In all seriousness thanks for your educational uploads. Your explanation while going through the schematic helps me understand immensely.
You're welcome, MiS......glad the videos are helpful.
Man, I got more out of your Tweed talk than I have gotten together on my own in years. Better understanding circuits vs "well, let's see what this does" is a step forward.
That's good to hear, AZ :)
Gidday uncle Doug! Well done mate! Finally, someone on yt has given a full & proper explanation of the correct, SAFE method of connecting up the incoming mains power through to the power transformer! I'm so glad it was you! 😊👏👏👏! You fault finding procedure was clear & precise, & I especially liked your 'trick' of hooking up your test speaker to the reverb driver transformer output to test that stage. What a great idea!
It's a shame a new tank was required though, but I guess reverb tank output transformers are just too tiny & fragile to try to work on aren't they? The very few I've seen appear to be, with ridiculously fine wires, & glued-in little magnets in them that may need careful alignment & calibration. They're not expensive so a replacement was the wisest choice, despite you having found the broken wire on the input side.
I was just wondering if the customer may have requested an EARTHED mains auxillary output socket as well as the removal of the death capacitor, he wasn't very clear on this.
I really liked your analysis & discussion of the development of the Fender circuit over the models too.
Another stellar video of yours that I could easily watch again!
Thanks so much, Neville. The only unobtrusive way to provide a grounded auxiliary output is to use an intermediate 3 to 2 prong adapter with a ground wire to connect to the chassis. So few people use the auxiliary outlet that it is rarely an issue
your adoration for the feline species is heartwarming,,,,love those critters Uncle Doug
Thanks, Tom. Yes, we do :)
Uncle Doug, its been a while. I fear for your health. Are you OK?
A new video has been posted, HD. It is currently for Patreon patrons only, but will be available later this week for you all.
That's a very nice sounding amp. Good job Uncle Doug.
Thanks, Zack.
What a wonderful resource this is!.... Thankyou!.
Glad to hear it, GB :)
Best tube amp videos on-line! Thank you!
Wow, thanks, Orvil.
It's great day for America! 🇺🇸
Uncle Doug and Jack teaching us all we need to know about Life the Universe, and Everything...
Cheers 🍻
We do our best, James :) Thanks !!
That amp is damn good sounding!
Thanks, AG :)
Man, Jack's guitar playing has really come up in recent videos. Must be all the primo catnip he's been into lately...
That and the lessons he's been receiving from KC......a feral musical prodigy.
Always happy to see a new vid pop up from you...I've been gigging with a 1965 Bandmaster head and it's just fantastic... amazing how almost all the gear from that era (and before) was just so 'right'
Amen, Ricky......I think we are all in agreement :)
Great teaching moments indeed. I just checked my MIM footswitch and sure as $hit, it came from the factory with the sticker turned upside-down lol. I came here looking for the fix for the VIB ticking issue and hit like and subscribe. Great video in all respects!!
There should be a statue of you somewhere. Amazing as always.
Thanks so much, Ryan :)
@@UncleDoug I agree. A statue commemorating the brilliance of Uncle Doug.
Fascinating. I have a question about the ac receptacle socket. After you’ve done the three wire cord and used the receptacle as a sort of terminal strip, the socket doesn’t work, right? Is there any danger from someone plugging something in to the receptacle socket? I an imagine a user down the line not knowing it is being used for a different purpose and plugging something into it.
The receptacle is still wired properly and works just fine, Keith, but it is not a grounded socket.
22:40 I was cracking at that comment...
Glad you enjoyed it, Tenzin.
W2EAW is a fellow ham and a super tech. Thanks for another great video.
He has one of the best YT tech channels on the air. Jack and I hold him in high esteem :)
I have a 1976 Marshall MKII Super Lead with 6550's that needs help from a qualified tech. I emailed pictures to your aol. Thank you.
I'll check my mail box. IP.
1:08:06 - Maybe 'blocking distortion' is what the guitarist was after! :)
Perhaps, David.
I have a friend with a pre CBS no logo '64 Blackface Deluxe Reverb, basically 100% original with the exception of the speaker, it was replaced with an Oxford. The volume pots are dirty and it could be quieted in the hum department. Would $300-$400 be a reasonable ballpark for a good tech to go over it, and address these issues?
To be honest, that sounds a little high to me, G&M, if no parts are needed, or are priced separately.
this amp sounds very nice ,enjoyed the video especially the troubleshooting on tremola and reverb very good info here ,thanks Uncle Doug for another awesome video!!!
You're welcome, Joe. Glad you liked it .
Uncle Doug was right about if you wait, it will cost you more. Here we are in July 2024 and I can't seem to find a clean one for under 4 grand! Will it keep going? Will these be $10,000 amps in a few years?? Buy now or be priced out forever!!! Just like real estate.
Amen, brother. Of all the amps on God's Green Earth, I would say that BF DR's are way better than gold as an investment.
You can thank the Guitologist for this new subscriber 👍
I will, next time he and I converse :)
Hi Doug! Thanks for another great video. Rather than the NFB Mod I prefer switching out/in one of the Cathode Bypass caps. Big difference.
Cheers.
Thanks for sharing, RCP.
The sticker on the footswitch is upside down. The lead is supposed to go behind the player, where the amp usually resides...
Most likely.....but the sticker could not be reversed without damaging it.
Your channel Uncle... I just can't do without :D Wholesome is one qualificative that comes to mind. Cat friendly is a plus for sure... hehe
Thanks so much, PMD. We try to be a "G" rated channel, as well as "K" rated.....for kitties.
Hey, Doug, they just went up to $4000 since the publishing of this video. You're a market wrecker, LOL.
Good grief !!! Next time I'll be sure to already own the amp that is featured.
Going to save for when I'm tucked in tonight ... on opening it UA-cam asked why I'd like the video ... I selected Informative, Entertaining and Calming. Your videos do sooth me.
That's great to hear......as long as soothing does not equate to boredom ;)
Speaking of MOD’s, if you were an angst filled, rebel without a cause teenager and you lived in Brighton in the mid ‘60’s, would you be a Rocker or a Mod, Uncle Doug?
Easy, TOFO.......whichever group was dedicated to Eddie Cochran, beer, fire-eater pizzas, and loose women ;)
Pisonic and Uncle Doug are the best amp techs the gods have allowed 🙏 many thanks 👌
Psionic
Thanks, Josh :)
three of my paintings. cats can up and die on you unexpectedly~ life does not come with an instruction manual~ Spats was rigomortis dead in a week, maybe all cats ...perhaps ole Jack~?
this is a superb amp, note heavy/size of x-former=cost and weight~surprised thermal changes do not screw with construction of glue/wire over time~
Fortunately, Jack has many happy years ahead of him, Jay :)
Uncle Doug My Man - You are the shit - your amp knowledge is killer. I barely understand 95% of what you are talking about electronically, I'm just a guitarist who loves Valve amps, but it is all super fascinating to observe and watch. I wish I was in Texas talking to you right now - Away, Away, Away!!! Thanks from Scotland - I wish I had a sack of vintage American/European valves (and no Death Caps!) to donate to you, so you can continue your amplifier, Howard Carter style archeological digs. - My major respect to you, you somewhat unsung genius/hero - Alex Kennedy (With every best wish I can muster). Cheers Doug. Come back at me.
Wow....thanks for all the very nice comments, Alex. We really appreciate them and wish you the best.
There's something satisfying about the sweep of an analogue needle. Cool video UD, nice troubleshooting, 👍
Amen, brother. Thanks !!
Doug
I have a great project.
It’s the original JMI VOX AC10SRT
The reverb and vibrato needs repaired.
Please tell me how to contact you.
Thanks!!
Please message me on my FB page: Uncle Doug's Vintage Amps.
Sung to the tune of “Rubber Ducky”:
Uncle Dougie, you’re the one
You make amp builds lots of fun
Uncle Dougie, I’m awfully fond of you
Uncle Dougie, joy of joys
Your amplifiers make such great noise
Jack and Ollie, seem to like you too
Oh, every day when I make my way to the UA-cam
I find a fellow that teaches great and has a voice that is so smooth
(tube-tube-ta-tube)
Uncle Dougie, never wastes my time
Deluxe Reverb, what a find!
Uncle Dougie I’m awfully fond of you
Wow, thanks so much, Andrew. This will become our new theme song :)(
I did the exact same testing procedure for the reverb of my 1966 Deluxe Reverb. When I rattle the reverb tank manually I can hear the same sounds as you have at minute 35:19 BUT when I plug in a guitar and try it there comes no reverb... do you have a hint for me?! THANKS!!
Yes, indeed, SM. Shaking the tank is a good way to test the output from the tank to the 12AX7 triode, but not necessarily a good way to assess the input of the signal from the reverb driver to the tank. Both the input from the 12AT7 driver and the output to the 12AX7 grid must be fully operational.
Fat power transformer. 5u4 driver grade?
I’ve never tested one at higher than 20w clean with 6v6gt or 6v6s JJs. 25w clean (obviously limit of output transformer) with 5881s at 4 ohms.
Thanks for sharing, Billy.
Hi: Amp biasing question for you - I am repairing a 1967 Fender Bassman AA165 circuit. The amp wants to see a 4 ohm speaker load. So, can I set the bias using an 8 ohm speaker load or do we really need 4 ohms to get the bias correct? Asking because all of my speaker cabs are 8 ohms. Could rig something up however. Thank You!
Surprisingly, the speaker load does not seem to affect the bias.....but it's best, if possible, to use the proper speaker load for the circuit.
Doug, don't forget that Humbuckers did not become available on 'Spanish' guitars until 1957, on steel guitars in 1956. The earlier Fenderamps did not need to be designed to handle these pickups. On the other hand, Gibson P-90s do not have as much output voltage as humbuckers but have significantly more then Fender single coil pickups.
Good point, Alan. Thanks.
I saw this posted this morning and it's been killing me that I can't watch it until tonight. 90 minutes of Uncle Doug goodness! I was hoping that amp repair would get me all of the chicks, lol
It does, Paul.......just be patient :)
You know what's really ironic? I know of Rob Robinette from years and years ago. Mid 90s. He had a personal Corvette website that he kept with all sorts of great info on it. I remembered the name because it wasnt normal. You don't see Rob Robinette Corvette a lot. It was even across his windshield. Pretty sure it was a C4. This would've been around 1995.
Cars & racing have been my passion since I was 15. The only thing that's drawn me away from it is guitars lol. I'm an automotive tech by trade, as well. Or I was. A personal loss sorta ended that. Just don't have the patience anymore.
Fast Forward 24 years later, to 2019, when I start playing guitar and I start seeing his name quite a bit among my Google results while searching for different info. I was shocked, to say the least lol. One thing I knew from his Corvette website was he always had good info. So I had no problems reading his site for guitar & amp info.
As a matter of fact, I was just there yesterday lol
Yes, indeed, JC, Rob Robinette is an excellent source of electronic info.
The reverb tank input transformer is 8 ohm AC impedance not DC resistance... and the output recovery transformer should be approx. 175 ohm DC resistance. Also, a dead reverb is most of the time due to a broken wire inside the tank or one of the RCA connectors oxided or with break in the shielded cables. IMPORTANT: the reverb output transformer could be damaged when driven with an open load.
I differentiated between DC resistance and AC impedance in the video, Chuck. Thanks for the info.
Why would they replace the transformer but stamp the shell and chassis with the same rubber stamp (serial number) that would seem fishy!
Your guess is as good as mine, P.
Hi Uncle Doug. Congratulations on reaching 💯K subscribers. A real testament to your hard work, expertise and high quality content. When I studied electronics, valves /tubes were off the curriculum. Your videos have really helped me increase my knowledge in this area. Thank you !
Thanks for your nice comments, Phil. I'm glad the videos have been helpful.
Hello there Uncle Doug, I was wondering if you could help an amateur out with circuit bending electronics. Do you know any good resources to brush up on reading material? I'm wanting to learn how to create PCB boards with patches for synthesizers and taking apart old electronic music toys from the 90s. I actually worked at a wire harness factory, soldered constantly and learned how to read blueprints. I'm familiar with diodes, capacitors, resistors, etc. I am no where near the experience or mastery of you, however! Hope all is well, brother.
I don't use books, GR, just the Internet. I'm sure there are all sorts of good sites for the topics you seek. Do a search and see.
no wonder Blackfaces are so expensive~ takes a fashion to put 'em right~ the reworked XL-40 is the same way~ still did not put a three wire plug, ran an auxiliary output past the input, was noisy~ smartypants ain't sharing the schematic, says look at their site~ foam prevented the feedback, was not the TO-3 which this particular one does not even have~
Wow....sounds like a real challenge, Jay.
Hi Uncle Doug. Did you caution viewer’s about the potential for stored electricity in the filter caps? When I change caps out I always discharge the caps to ground
I assume you already did this.
Yes, I emphasized this in numerous previous videos, Forrest, and even showed how to build a tool to discharge the caps.
Nice! Bring out the old Simpson 260 meter! That just brought me back in time!
Glad you enjoyed it, C :)
Very nice vid as usual. Love the methodology. Wonder about another effect of increasing the second node resistor in the power supply. It should also give less ripple to, and thus less hum from the pre-amp stages. And wow, those cats can play! I notice a big improvement over the last few years there in the audio demonstration performances!
Thanks so much, Ravi. Glad you liked it :)
Hello Uncle Doug. A good friend gave me a 64 Deluxe Reverb. Hasn’t been used in 30 years. Has all the original RCA tubes in it. I dont even want to plug it in. Would you be willing to go thru it for me?
Wow, what a great gift !! I'd be glad to tune it up, WG, but I'm currently coping with a back log of repair work. Please give me a few weeks to catch up and then contact me again by PM on my FB page Uncle Doug's Vintage Amps. Thanks.
I’ve been looking for a a better face plate for my 67 Dual Showman TL 5000, any ideas ?
Check on Ebay and do internet searches. I understand that many of the Fender control panel plates are being remade.
Who knew that Jack was an illegal Canadian immigrant? Thanks, Uncle Doug, and all borders should be open to cats, no matter their nation of origin. I'm also a dog fan. (One of each species at present.)
He's actually a descendent of Napolean.....conceived during an inter-species dalliance while on the Island of Elba.
Is that cloth covered wire or is it asbestos and cloth covered wire, making it illegal for modern safety standards! 1965 that coveted asbestos covered wire should go jest like the old capacitors, and the two prong cord, sorry jest saying.
Thanks for your helpful input, HH. There is no asbestos in the insulation.
Hi Doug! I would actually replace the awful RCA tremolo switch connector with a 1/4" connector with a built-in switch, so the footswitch is not needed to use the tremolo. The switch also would then use two different plugs for the tremolo and the reverb, so that there is no chance to switch them around.
Thanks for sharing this with us, Andreas.
Hi Uncle Doug...In your educated opinion, are radial caps as good as the axial types and do you think they will hold up for years , or are they not as good. I see they are much smaller which may or may not keep down noise etc. Many thanks for great videos, one can actually learn to build an amp from watching your clips.
I have a feeling the "guts" of both types of cap are quite similar. The axials are just easier to work with in a P to P circuit.
Once again I enjoy yer videos immensely. Are you a Ham radio operator??? K9POW - Rusty in eastern Tennessee
No, I've never been a Ham.....other than some performances in the videos :)
Hello sir, this is a bit off subject but I bought a Premier Twin-8 amp from you years ago and i’m in the process of trying to sell it! I keep getting asked what year it is but i’m not sure! I only have the serial number and not sure if the date code might be somewhere inside. Not wanting to take it apart. Would you happen to remember the little amp and have an idea what year it is or maybe help me figure out what year it is? Thanks for any info and keep up the great work here! John in El Paso
Greetings, BJ. According to my records it was made in 1965. Best of luck with your sale.
Can you recommend a tube manufacturer for my vintage blackface deluxe reverb? Thanks for the great video!
I've been using TAD tubes, Eric, but they may no longer be available. I will begin trying out some of the Russian brands to find a good replacement.
Uncle Doug, I was wondering if you could give me some insight on something? Is there any place where I can do one stop shopping for amp repair parts? Seems like I have to shop at a couple of different places online to get certain parts. I’m finding that I have to fill my orders in 2 or 3 locations and this drives up the total shipping cost, along with the delivery times.
Understood, HH. I buy all my components from Antique Electronic Supply or Mojotone. Both offer exceptional service, good prices, and reasonable shipping.
Uncle DougI , for some reason I love troubleshooting. You're approach is perfect.
I do too, Brad. It's a logical and (hopefully) rewarding process.
The owner said nothing about changing switches or changing original power cords , you started doing that before you even heard back from him, what if he wanted to keep it original
When arranging to send amps to me for repair, the owners and I discuss their wishes. Certain requests, like significantly changing a classic vintage circuit, are rejected, while reasonable, rather unobtrusive changes are agreed upon. This was done before the amp was shipped and the video begun.
Just came across this deep dive into the technical side behind the EVH amps, etc which I thought you might find interesting: ua-cam.com/video/aKejQ1WBybA/v-deo.html
Thanks for the link, Kieron :)
Hi Doug, Do you know if a power transformer for an export model Princeton would work for a domestic amp by properly wiring it? thank you.
Yes, it probably would. Most export PT's have primaries that can be wired in parallel for 120VAC and in series for 240VAC.
Thanks so much for the wonderful videos, the "part 2" feature where you delve into the circuit changes and differences in recent videos is like finding gold for me! Please keep it up, no one has helped me understand the changes Fender made through the years and the benefits/drawbacks of each better than you!
You're quite welcome, Davy. I'm glad you enjoyed it.
Great video but I feel like I should be paying tuition for that course in Deluxe Reverb circuit evolution!
Thanks, Squid. You could always become a Patreon patron :)
I repaired a reverb tank that had a faulty output transducer by replacing it with a hifi pick-up and stylus.
What an unusual and challenging repair, Tom. Thanks for sharing.
Got a question is anyone doing point to point wiring conversion for a 1995 Blues Deville 2 x 12 ?
Maybe a brave viewer will step up, GF, but we sure don't offer such a service.
great episode. I wish I was his apprentice. so much knowledge
Thanks, N :)
25 watts is PLENTY of sound these days.. most gigs ive done in the blues band im in im told to turn it down all the time. As one does to guitar players..
And thats with a 12 watt or so princeton.. hehe
I guess it depends on the size of the venue and the rudeness of the audience, Scott. You have to be a lot louder in a room full of drunks than in a church ;)
With the treble at 5 it’s just like too piercing man, too piercing, like I don’t dig loud noises man.
Sorry to hear that, Joe.
If im not mistaken the foot switch is supposed to be backwards at least that how my old super reverb worked. gotta keep it original. ;)
That may be true, but mislabeling the two switches doesn't make much sense to me.
Doug, should not the fuse come before the on/off switch? Your way, you are not protected by an internal fault of the switch to chassis. Only the service breaker. Hope you rethink this. I would connect the main (black) conductor to the back of the fuse holder.
Nope. Have you EVER had a toggle switch short to the chassis? In 40+ years, I have not. On the other hand, can you envision someone switching off an amp (wired like you propose) and checking the fuse....only to be electrocuted? I'll play the odds, Mr. Moose, and go for safety rather than conventional ""wisdom". Thanks for your input.
@@UncleDoug Doug I understand your position. The National Electric Code considers the "plug" the equipment disconnect for regulatory compliance. In my company our required design policy was always Plug > Fuse > Switch for Ground Support Equipment design. I just followed our requirements in my designs, but never researched the safety codes that may have driven it. I just sent a note to a friend of mine on a IEEE committee that deals with such things, asking for his opinion and any relevant regulatory requirements. If he gets back to me, I will share his insight, one way or the other.
While I wait for his response, I would recommend to all reading this to look up ANY Tektronix schematic for plug connected equipment. There are free schematics all over the net for the vintage gear. (A good one are the TM502A, TM503, TM504, TM506, TM5006 Power Racks) You will find that all are Plug>Fuse>Switch.
All the best, theBigMoose
@@theoldbigmoose Thanks so much for your follow up comments, Moose. Since I am not a manufacturer, I can rely on common sense rather than (often poorly conceived) rules established by bureaucrats.....but guitarists and amps are a unique group. Imagine a scenario in which an amp suddenly goes dead during a public performance. The guitarist quickly puts one hand on the chassis and unscrews the fuse cap with the other.....reaching for the exposed end of an unblown fuse......ZAP.....end of the show.
@@UncleDoug I do hear you, and of course you are free to redesign for your customers as you desire. However, a properly designed fuse holder will disconnect the fuse from the end (tail) connector before the front fuse cap connector is exposed. The line (black wire) should be connected to the back, or "tail" connector of the fuse holder for this reason.
I know it won't mean much but I had to design reliability using MIL-STD-217, and toggle switches do not have a 0.0 failure rate. (Section 14.1 of MIL STD 217 for toggle switch in ground mobile applications has a failure rate of ~5.7 per 10^6 hours of use) A NAVSEA addendum states: "Switches are considered relatively high failure rate items due to the moving parts and the wear-out mechanisms. Vendors often specify switch reliability by giving a maximum number of switching sequences rather than a rate of failure with time. Reliability is further decreased as temperature rises and adverse chemical reactions from internal materials are accelerated. In addition, the insulation resistance between the switch contacts and ground decreases as the temperature rises. High temperature can also affect the insulation from the standpoint of voltage breakdown, due to a change in dielectric strength. At the opposite extreme, switch reliability can be degraded by low temperatures. Low temperatures can cause material contraction and cracking, allowing foreign material and moisture to enter resulting in short circuits voltage breakdowns, and corona arcing. "
Of the data NAVSEA collected for toggle switches, 65% failed in SHORT, 16% failed by STICKING, and 19% failed with a parameter change (internal resistance.)
Edit: As promised, I just received the reply from my friend in IEEE, shared below:
"Hi yyyyy:
There is no requirement for the sequence, fuse-switch or switch-fuse. I recommend fuse-switch as this sequence protects against some kinds of switch failure as well as the wiring to the switch.
Likewise, there is no requirement (some will argue against this point) that a fuse be in the "hot" wire. However, I recommend the fuse be in the "hot" wire as this protects against ground faults as well as load faults. (The breaker in the installation is always in the "hot" wire and protects against both load faults and ground faults.)
Note that in two-wire non-polar equipment, the fuse can be in "hot" or neutral wire depending on plug insertion orientation.
Best wishes for the New Year!
xxxxx"
All the best, bigMoose
@@theoldbigmoose Thanks so much for all the very helpful information, Mr. Moose. Likewise on the NY good wishes.
They have hand-held Laser Units that will get that rust off in a much more genteel way than most of us are accustomed to
ua-cam.com/users/results?search_query=cleaning+laser+rust
Thanks for the helpful link, RA.
According to some research done years ago by Bell Labs, gold connectors should not be used with non-gold receptacles because the dissimilar metals can result in electrolytic corrosion.
I'm surprised that gold would enter into any chemical reaction, Dennis, but thanks for the tip.
That silver face age i like their(......color?)
Sound over blackface. It may be the , silvercone?
Not sure what this means, Hadley.
Huh?
"Opto-cupled Burrito" should be in the Taco Bell menu! (38:37)
If they use it, Jack wants a royalty :)
That’s one SWEET sounding amp. So nice 🍀 Aloha 🤙
Thanks, D :)
Very nice. Lots of tips. I wonder only, if the old Gibbs tank could not be just repaired instead of replaced. Many thanks. Alvaro.
The tank transducer magnets lose their strength over time, AR, and are not, to my knowledge, repairable.
@@UncleDoug Understood. Many thanks Uncle Doug.
Nice tremolo and reverb lesson! Thanks!
You're welcome, Michael.
Hi Doug, Do you have an early 70's Princeton power transformer for sale?
I'm sorry, Doug, but no, I do not.
Thank you uncle Doug,very helpful God bless.
You're welcome, Julio :)
You must feel out every amp on every video. Why not a pointer stick...
I do both, Psy, depending on my mood......and the availability of a pointer stick.
Hi Uncle Doug, I want to build my 1rst 5F1, and shopping around at the swap meet, I found a small chasis with a heavy transformer and 2 5Y3 tubes. Do you think that transformer is the right one for my project? I suspect that’s a power source of something similar.
I really can't guess if an unseen transformer is appropriate, Sal. The fact that it has two rectifiers is rather strange. Perhaps it was for a very high wattage amp.
@@UncleDoug Thanks!
F & T . . .
Flip & Top?
(only Ampeg-heads would get that)
Even non-Ampeggers know about the flip-top model, RA :)
Hi Uncle Doug, any reason you don't show you doing actual work on the amps? I'd personally love to see your technique. I've noticed you have a Weller soldering gun by your bench, is that your go to? I only personally use it for heavy jobs like soldering to chassis.
1.) Since I use a handheld camera, it's hard to work with only the one remaining hand. 2.) Showing the actual work process rather than each completed step would extend the video length at least 2 or 3 times. 3.) My hands are plagued with both arthritis and severe carpal tunnel issues, and the physical manipulations are often performed slowly and with difficulty. I do use the Weller gun almost exclusively. I have irons, but prefer the gun.
@@UncleDoug Many thanks, I am inspired by your work on the daily. You have left us quite the legacy to learn from.
@@julesl6910 That's great to hear, Jules. Thanks !!
surprising a customer would want a modification.
It makes use of an otherwise useless switch, Bio, and is easily reversible.
46:33 I hope this isn't too confusing. I believe originals were Vib left - Rev right with cable TOWARDS player, whereas reissues (like this one) are now available Vib left - Rev right with cable running AWAY from player. So, this one is wired like original but labelled like reissue - hence the "backwardness". Myself, I have a reissue '68, the footswitch was like original (Vib left - Rev right with cable towards me). I prefer cable going away from me, so instead of having to read the darn thing upside down all the time, I removed the label, created a very convincing replacement which now reads Rev left - Vib right, with the cable running away from me. There's probably been a demand for this (cable away from player), hence the reissues being built/labelled this way. But yeah, they should make SURE they wire them correctly! lol Btw, had you "simply" flipped the label around like some suggested, this would have run the cable towards you! Yuck! Great work Uncle Doug!! I soooo wish you lived closer to me - Eastern Ontario.
The real consideration, Mark, is that the reverb line to the footswitch must be shielded, since it carries signal. The tremolo line is simply a ground and need not be shielded.
@@UncleDoug Yup, saw that (and just checked mine to be sure). It was/is correctly wired, I just prefer the cable running away from me, not towards me. My new "custom" label matches the wiring, I simply had to reverse it...and so it reads Rev LF - Vib RT instead of the "standard" Vib LF - Rev RT...with the cable now running away from me of course.
***100 THOUSANDS SUSCRIBERS****
A wholeheartedly congrats to our favorite Uncle of the whole internet! Thanks for this channel UD, I speak for all 100 k of us.
I celebrate you found success these years, unfortunately in the meantime this platform became another example of everything that is wrong with the world nowadays. Still the 100k silver button you can wear with pride, as those buttons are a recognition that represent the audience, not the platform. No matter they shape them in the now evil corporation's logo.
Please let us know if you would plan migrate this channel to another platform like Gab TV, I will follow wherever it goes and also would subscribe or even pay whatever subscription necessary to be able to sit back, relax and see a 1959 mint condition Fender amp receive the UD treatment.
Thanks again, keep on rocking. Best of luck ahead for you and your family!
Kilovolver.
Thanks so much for all your very nice and informative comments, K. We'll stay put for now, but I'm not pleased with the idea of YT inserting advertising without the channel owner's permission.
@@UncleDoug Sorry if my rant overshadowed what I really wanted to say: BIG CONGRATS and much success! from now on 1 million subs is a cakewalk! Thanks for all UD
Hi every body: I bought a new 65 Princeton Reverb amp a while ago, a limited edition with a 12" speaker. Shortly( within 2 hrs of first use), amidst crackling and nasty noises, the tremolo conked out. Of course I quickley unplugged everything and started all reconnections with different guitar and cord. The amp worked just fine( no funny noises) and still does. However, tremolo is dead. all elese works. Could this be simpley a tube or ??? Thanks for any help.
P.s. I'm an old guy and do not play any overdrive or loud music. Amp is in the same place all the time. Returning it to vendor would have been a huge pita!
It could be the oscillator tube, John, but it's impossible to diagnose long distance. If it's on warranty, I would have it repaired by a qualified tech.....pita or not ;)
One thing is confusing me: at 35:10 when you shake the tank it seems to be producing output; crashing of springs is heard. Then at 43:15 you find the output transducer has failed open circuit. How can I reconcile these two seemingly contradictory findings?
I cannot, Sooti, unless the cables were switched and the input transducer......connected as the output......produced the noise.
@@UncleDoug That seems a likely explanation. Thanks!
Mr. Carlson once corrected someone that the 5B3 is not called grid leak bias but “Initial Velocity Bias” but didn’t explain anything past that. Any insight for the common man? Perhaps I’m mistaken? 🤷🏻♂️
You'll have to ask him, Huddy. The only term I'm familiar with is the one I used.
@@UncleDoug nobody breaks it down like you Unc 😉