Tube Reverb, Part 1
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- Опубліковано 17 вер 2024
- In Part 1 of this video series, we discuss in depth the design and function of the reverb effect as utilized in tube amplifiers, and particularly Fender's 6G15 Reverb Unit. The overall circuit is broken down into three sections: The amplifier and output transformer that drive the tank, the tank itself, and the final amplification, tone, and mixing circuit. The presentation also features two visits by Jack, the cat, and a tour and short drive in a nice old 1940 Ford Pickup.
A modified schematic, based on the original Fender 6G15 Reverb Unit, but updated with changes to improve the tone, safety, and longevity is provided at this link: app.box.com/s/...
If you enjoy videos like this, please subscribe to our channel and also consider becoming a patron through Patreon.com: / uncledougsvintageamps or by making a donation to PayPal account: dldcam@aol.com. Thanks for watching !!!
NOTICE: The link to the revised schematic, wiring diagram, etc. is now available in the video description.
Another excellent tutorial, Doug. I have a question: do you refer the the LPF (C12, T3 and C13) as a "Pi" filter? I was taught that nickname years ago as it has a shape vaguely resembling the Greek letter. EDIT: That's a beautiful truck.
my question is ? has anyone out there built this reverb according to the layout diagram and schematic. on the top lay out the electrolytic caps have one red and two yellow wires coming from them. yet when you look at the under chassis there is two red wires and one yellow wire coming from the top as far as I can tell. the other thing that I wonder about is the output jack has all 3 contacts to ground and the wiper on the mix pot . the last time I attempted to build something it was from a book all about tube amps and when through with it it didn't work, checked it several times . no go. got on the net and after much searching found out there were 3 wires left out of the schematic in the book. nuff said. Otherwise I love all the videos. I just wish that the people that write stuff would build what they publish.I don't think uncle doug is at fault but I wonder about who did the layout after.
Uncle Doug, your "Ass kicking" metaphor is just perfect.
Thanks, IT :)
Some of the theory discussion reminded me of a story about Buddy Holly recording in Clovis, NM. To get an echo affect, they lined the walls, floor and ceiling of an attack in a structure on the property with ceramic tiles. I speaker was placed on one end and a microphone on the other end. They routed the signal thru that room and captured it on some famous songs. Buddy Holly's family had a tile business in Lubbock and they always had left over tile - so they put it to good use. I love reverb and now I understand how it works. This would be a great project - it's on my bucket list now. Thanks UD!
You're welcome, Chad. Thanks for sharing this interesting story.
Thanks uncle D, It seems I did watch a part of this already, but never finished it.
It really is like a speaker.
If you mean that the reverb tank is driven by an output transformer, just like a speaker......yes, it is.
@@UncleDoug yes, the magnet part as well...
Welcome back. The Ford Paint Job is Flawless. Love the color. Cool reverb stuff. Thanks.
You're welcome, JM :)
Well, this is quite apropos...I'm currently building some tweed circuit amps and I had some lumber scraps left over so I thought..."what can I build"? The answer that came to me, like, in the last two days was a 6G15! And what I understand is that these units produce a much more refined reverb sound than the ones that come in, for example, the old Fender Deluxe Reverb. Thanks for this video tutorial--much appreciated!
And...as a bonus...yet another sweet ride.
Looking forward to No. 2! Keep up the good work, Doug.
You're welcome, Brian. Yes, I would say that the 6G15 offers the finest tube/spring reverb that the world has ever heard :) Thanks !!!
Never had my ass kicked by amperage...yet. Give it time. :D
It's climbing over the fence as we speak :)
makes my tongue numb just thinking about it. :-\
The Guitologist
Well that’s really good; I hope you never do. I stupidly have, 220 across the chest, very lucky to tell of this idiotic stunt.
I welded a screwdriver into a 200 amp service panel once. Scary and fun all at the same time. Having said that once was enough to make me buy insulated screwdrivers 😂
I once tried to pulled two 100 amp 600 volt fused one in each hand. Had entry and exit holes in my fingers. Was stupid enough to believe my apprentice electrician had turned off the main switch, when I asked him. I screamed like the guy from the movie Home Alone, when he got electrocuted on the basement sink handled.
Most eloquent voltage and current analogy I must say. I have always used the little brother spraying a water hose into your face analogy. What I would give to have “nicely parted hair again, instead of sparsely existing hair”. As always excellent video. It dawned on me this morning with your explanation of the tank that it is taking advantage of Standing Waves “which are the bane of us Ham’s,” to create the delay. The ride in the 40 Ford was bliss for this misplaced West Texas boy. I grew up strictly Chevy, but own 3 Fords nowadays, so I am of the “use the best parts of each” camp.
Thanks so much for all your thoughtful and accurate comments, Mark. The top of my head can be seen from space ;)
Creating machines that produce beautiful sites, sounds, and experiences inside and outside is never blasphemous, but nearer to miracle . Enjoyed the video, looking forward to part two.
Thanks, Brian. There is something magical about music.
First the top-notch explanation of the reverb-circuit and its hardware, but good Sir! THAT TRUCK! That is one looker and the paint-job beyond any reproach. I've said it once, and I say it again: the level of perfection you achieve in your work seeks suitable words to describe the awesomeness on display. That's what draws me in to your videos ... and that FINALLY someone on the internet addresses the age-old problem of Tango-dancing Sumo-wrestlers in the vicinity of spring-reverb-tanks :) What a show, kudos!
Thanks so much for all your very nice comments, KS. I would say more, but I have to hurry off to my flamenco dance lessons :)
I lived in El Paso for about 8 months and remember crawling out of Rosa's Cantina what a fun place, and sneaking into New Mexico on Sunday mornings to hit the liquor store😆
Those were the good old days, Craig. Nowadays, they sell booze in Texas on Sunday.....or so I'm told :)
@@UncleDoug yes sir I quit drinking a few years ago myself.
@@craigjacob3704 Good move, Craig.
That is hilarious Doug‼️ I have heard many analogies of Volts & Amps from trains to water towers and spigots... but ass kicking is priceless. I wish I had you as my electronics professor in college. Mine usually barely made it to class ( not an exaggeration).
I would love some information on plate tanks. I know the studios use those and only the studios can afford them. Thanks for your very clear and down to earth (or chassis ground) explanation of so many things in every video. I’m definitely going to build this. I have two old EV 10” speakers begging to be used for this.
Great job Doug. 👍🏻
You're welcome, James, and thanks for all the very nice comments :) Two EV 10" speakers are an enviable burden.....they MUST be used in a project :) Here is a great comparison of plate and spring reverb: theproaudiofiles.com/plate-reverb/ To me, the plate sounds much cleaner, like a pure echo.....while the spring sounds more jangly and noisy......but I'm not sure, when it comes to surf guitar signals, that the spring might not sound better, while the plate is much better for voice.
Uncle Doug
I totally agree with you Doug on the guitar reverb. Likewise, the voice and some acoustical sound sound amazing through plates. Judy Collins singing “Farewell to Tarwathie” on her _Colours of the Day_ LP is amazing... especially with the whale’s voices to supplement. No, I did not just drop L-25. I might. Have in ‘72 though.
Take care and thank you for the link. I am going there now.
loved the Easter egg at the end! please more videos about old classic cars, maybe some tutorials on how you fix them up?
Please check out my other channel: Uncle Doug's Hot Rod Garage, Brandon.
really great job explaining the reverb effect Uncle Doug! I hope success doesn't cause any addiction problems for Jack, that boutique catnip has left a string of broken hearts in its wake!
Thanks, Dave. Jack is one of those rare performers who actually seems to benefit from "herbal stimulation" :)
The paint is beautiful and the Ford truck looks sharp. See you in part two.
Thanks, JJ. Until then...............
Im just crazy over 40 fords and this pickup is the cleanest dark cherry example i have seen! Beautiful truck doug!
Thanks, ET :)
Love the reverb video, love that truck a LOT more!
Thanks.....twice, Jeff :)
Excellent explanation not lost in the equally excellent details!
Glad you liked it, BA.
Let the education begin! I'm very excited about your entire channel, and explanations. Never did I hear a better analogy of voltage vs amperage.
Welcome aboard, SK :) Glad you liked it.
Outstanding video as always, Uncle Doug! The Ford pickup is gorgeous! I would suggest next time, to increase the volume in the comment section, install a 1.5 l Honda engine. I also enjoyed the scenery of the Southwest. It is quite a stark difference to what we have up here in the Northeast. Thank you and keep up the great work!
Thanks so much, Tim. I like your suggestion, but will probably transplant the engine from my lawnmower into the next hot rod :) Will do.
Uncle Doug, In regards to the wonderful 40 Ford truck, Back in the day (as I am sure you are well aware) it was VERY common place to install a nail head Buick (or insert your engine of choice) in whatever vehicle you might happen to have with zero regard to originally. Hot rudders from days gone by would slap in whatever engine they had or was the hot ticket at the time. So for me you are just continuing on with a time honored tradition! Fantastic truck! Oh and the reverb explanation was sublime, I finally understand the alchemy going on in the magic box lurking in the bottom of my amp, lol. As always thanks for your clear and concise explanations of complex subjects!
You're quite welcome, Jack :)
I'll never think of volts and amps the same way again! Priceless! ...and, if Sumo Dancing ever becomes a 'thing' after this, we'll hold you entirely responsible! 😂😂
Thanks, Keith. Weird analogies tend to stay with us much better than the old, boring ones :)
Looks like a Premier reverb unit that we bought in 1967. Yours kicks some serious butt. Thanks for the great explanation.
You're welcome, Rick. I've never had a chance to work with a Premier reverb, but would love to do so. Thanks !!!
Thanks a lot for the video Doug and hi to Jack. Take care and thanks for the ride!
You're welcome, Colin. Jack says "back at ya" :)
A little over 40 years ago I used to drive my "long-springs" full length hammond twin-spring tank with a tweed champ, using the reverb tank in place of the speaker, and run the output from the tank directly into the FET input on the tape recorder. Delicious syrupy wet sound. Looking forward to Part 2.
An interesting experiment, Joe, that proves the fact that the initial reverb-driving circuit is virtually identical to a 3-tube amp, and the tank is analogous to a speaker. Thanks for sharing this with us.
lost my reverb in my 1970 vt22 v4 ampeg ,think I will take to my local guy that totally redid the amp in 06 just not ready to tackle this beast ,as always your videos are very informative .yea finally getting videos that have not seen !! thanks for all your hard work Uncle Doug !!!! in the videos and repairs wont miss any!!!!
Thanks, Joe. Good luck with the repair.
You sir are a blessing to us electronic techs that love audio equipment.
Thanks so much, C58 :)
EXCELLENT tutorial on reverb, Uncle Doug! Love your easy to understand explanations of function, and for keeping the math easy to comprehend.
The '40 Ford truck is AWESOME! I LOVE that color!
Pets and chin scratches to Jack - always the tremendous help.
Jack and I both say, "Thanks !", Dave.
That is one sweet truck, you don't need to defend anything you do, sir.
Thanks, Wes :)
What a beautiful truck. Dang what a nice ride.
Thanks, Craig :)
Great video Doug! Very interesting to see how these old reverb units are put together. The truck came out awesome too, some nice craftsmanship with the bed of it.
Thanks, PC :)
Beautiful "eggplant black" truck Doug, and the interior is very nice too.
That's an interesting color comparison, GP. Thanks !!!
If anyone needs to build an artificial center tap for the heater wiring, run a 100 ohm 1/2 watt resistor from pin 2 and pin 7 to pin 8 on the octal power tube socket. It's even better for noise reduction being elevated from ground by the octal bias resistor and the easiest spot to do it.
Pin 2 and pin 7 are the heater connections for many(Almost All) octal power tubes in guitar amps, refer to the tube datasheet if you aren't 100% positive.
Doug and Jack, it makes my day when I see a new video, thanks!!
You're welcome, Matt. Elevating the AC filament supply by attaching the resistors to a DC source, like the cathode, is an excellent way to reduce noise. Thanks !!
The quality of the finish on this unit is testament to the skill applied, given that it was the second project you had done. The covering is still bonded tight with no lifting even on the corners, which is usually the first place to separate. Previous experience fabricating hot rod interiors helped I'm guessing? I very much like the material on the front. Hope you didn't steal one of your Gran's couch cushions for it. Another well chosen topic. You set the bar very high with your videos. Really smooth looking truck, beautiful colour. Looks good, sounds good, starts first turn of the key no doubt. Ford truck, Chevy engine, it's still American. Put your foot down and your cruising, don't see a problem there. At least it's not powered by a four cylinder turbo diesel from Europe. Regards, Jeff.
Thanks for all your very nice comments, Jeff. The material for the front panel came from an old upholstery shop here in town. I bought several yards of it about 40 years ago and have been using it ever since.
Yes we can see the beautiful black cherry paint job. Wow great explanation with the function of the amp, and reverb. Thanks for all your help.
You're welcome, Hack. I guess I'm just defensive after so many people have complimented the "black" paint job :)
Wow!!! Two of my Fav's in this Vid Uncle D!!! Tube Reverb and a Gorgeous Classic Pickup truck tricked out for Modern Day driving!!! Thanks for the Great Videos!!!
Hi Uncle Doug, I must say the detail on your car is outstanding Sir. You are a perfectionist in all of your projects and your level of experience your explanation skills are second to none, finally understand how a spring reverb works after all these years... A very informative video, thank you so much can’t wait for next Video, oh and say hello to Jack Cheerio for now
You are quite welcome, Holger. Thanks so much for all the nice comments.
I love the feeling ya get from finding and then figuring ,and then the process of doing .You have high standards .I love the ford .I need to build one of those stand alone reverb units.Thanks again Doug .
You're welcome, Stephen :)
Thanks for all the sage wisdom Uncle Doug. Starting my own amp repair business out here in Arizona!
You're welcome, Jason. Best of luck.....it's a tough, but rewarding business.
Thanks Doug, really appreciate the work you put in to these clips. I've learned so much from you..
You're welcome, Steve :)
Awesome video UD! That is a sweet build. I just scored a 1964 Eico HFS-1 in good shape for cheap. And I just finished watching the original video on "the other channel" ;) It was kinda like having a cup of coffee with Tool Time's neighbor. So I'm a happy camper. Great video! Thanks as always!
Thanks, FW. Glad you enjoyed it :) Nice acquisition !!
That analogy actually REALLY worked! That makes perfect sense to me 😂
That's good to hear, E.
Cats talk with their eyes, long blink is the ultimate sign they trust you. That little blink at 1:27 he said "you're ok O'keeper of the treats...is it time to eat yet??" . Don't quote me, Jack might get angry :)
I wouldn't think of it, RR ;)
The Truck! Love the paint and details.
Thanks, K :)
That’s your SECOND home build?!That’s incredible, UD. Looks like it could be a Valco. It’s evident you took your time getting it right. A reverb unit has been in the back of my mind for a while,now.
Thanks, William. It's a great project.
I realize I'm late to the party but that was the best/funniest analogy I have ever heard!! you're the best Uncle Doug!!
Glad you enjoyed it, Jonathan :)
I would love to know how or why this video currently has 6 dislikes.
Footage of the cat?
Footage of the truck?
Crazy analogy?
Not crazy enough of an analogy?
When someone throws something into their video that is off topic, I am always annoyed, at least a little bit. But Never with Uncle Doug. To me it’s like he is inviting me into his house and showing me around. I don’t think I could ever get much more comfortable. But then again I am an animal lover, especially cats. And vintage anything has been one of my passions from day one. Plus I have a very real reason to learn what Uncle Doug is teaching us all. So I have my reasons to come here and get comfy, but I would still very much like to know why 6 dislikes? If I don’t stop scratching my head I’m going to go bald.
Thanks so much, MC. It's great to hear someone else try to analyze this puzzling situation.......and, in my mind, the 'puzzling' part stems from UA-cam allowing people to cast aspersions on poster's hard work, without also requiring an explanation. In the absence of any justification.....and there may indeed be some, but we'll never know......it's easy to dispel the few thumbs-down as the predictable byproduct of jealousy, ignorance, immaturity, or just plain meanness. To be honest, until the nay-sayers grow a pair and verbalize the basis for their complaints, that is exactly how I will view them. Thanks again.
So happy that youre posting videos. You've got a bonafide fan over here in Alvin, Tx.
Thanks so much, Kevin. It's good to hear from a fellow Texan :)
Great explanation on the reverb, look toward the next one. I gotta say, all the truck videos have been fantastic, but I think this one is my favorite. I grew up loving the 40 Fords and this one is a beauty. I use to be a fuddy dud when it came to everything original and so forth, but as you grow older that practicality and reality start to tap you on the noggin, Thanks for sharing Doug.
You're welcome, Carl. Thanks so much for your nice comments :)
Another awesome video from Uncle Doug! Thanks Doug very enjoyable!
You're welcome, David.
Many thanks for the info UD and that's my favourite car yet. Keeping a totally original car is not a good idea most of the time unless its perfect or in a museum. It's like keeping bad caps in an amp, nice to look at but don't work too well.
Good analogy, Danny. Thanks !!!
305, good to be alive!!! Nice work!
Thanks, Wayne :)
I want a ride in the 1944 Ford pickup. Love the color. Add a sub woofer and this truck will rock!!!
Thanks, Bob. We'll be over to pick you up soon.
Great video Doug! I've built one amp with tube driven spring reverb so far, and I have found that it adds a certain magic to the tone that I really enjoy.
Thanks, Kley. Reverb is indeed a wonderful effect :)
I'm trying to repurpose a reverb tank and amp from and old Baldwin Orgasonic (as well as the other goodies in the organ). Most instructions I find are about Hammond parts. This helps so much; thank you!!!
You're welcome, Chris. Good luck with your project.
Uncle Doug, great video, great explanation of a rather complex subject. Regards from Germany
Thanks, TM. It's always good to hear from you :)
I am really enjoying this series on the tube reverb. The cameo appearances by Jack are threatening to upstage you, though.
Great job on the pick up. Nothing wrong with some practical resto-mod work, in my opinion.
Thanks, Anthony. Jack is such a ham that he could probably upstage Daniel Day Lewis.....so I don't feel too bad :)
I just wanted to mention that UA-cam did not notify me of this video for some reason.
It's apparently a common thing lately which I have confirmed several times now with my favorite subscribed channels.
Sooooo glad you are still making videos :)
Tons of Love form Canada.
Thanks, Justin. I assumed that all subscribers were notified each time a new video was released.....but from what you tell me, that's not the case :(
People have even been unsubbed and subbed by UA-cam as well recently. I watch alot of bigger channels that talk about this often. This new video of yours only showed up in my home page recommended list. When I read it was a day old video already and had not gotten a notification I was super unimpressed with the platform.
All bad news, Justin. Here we are, doing our best to produce good videos, and it seems like we're being sabotaged :(
I agree. Hopefully it's just a phase of growing pains and it will work out for the positive.
Here's a video about the new thing UA-cam did to control the channels content.
ua-cam.com/video/XdkMrDmODtw/v-deo.html
Loving the tutorials Uncle Doug. I tinker and modify CB radios so I have been gleaning great knowledge from your channel. I especially enjoy Jack and your truck bonus features. That is one beautiful truck. Thanks for sharing your knowledge.
You're welcome, CC. Thanks !!!
You never disappoint Doug. Look forward to the next installment 😉
Thanks, Steve :)
What a great video. Your explanation of how reverb works is spot on. You have given me the confidence to build my own. The truck is awesome. Pedal dam ya. Love it..
Thanks so much, Danny. Glad you enjoyed it.
that is the best description of amps and volts Ive ever heard. Presumably its an electric fence.....boom-tish!
Good one, OB :) Thanks !!!
Awesome, awesome, awesome! I'm so happy that you are covering this. Maybe it will give me some insight as to why the reverb on this amp I'm working on is so over the top to the point that it's unusable.
Thanks, B55. It sounds like the tank may be overdriven. Are all the components original? Perhaps there have been some substitutions that cause an impedance mis-match. Regardless, you might be able to reduce the signal input to the tank via a modification of the Dwell/Volume control.
Uncle Doug It has a 25K:8 ohm transformer driven by the first half of a 12AX7. Tank is a shorty. 8AB2A1B, which is a 10 ohm input tank. Not sure if that would make that much difference, though. Recovered by the second half of the 12AX7. The dwell pot is after the second half of the 12AX7, right before the phase inverter. A 1M ohm audio taper. This was the stock layout and only one of the issues with the Epiphone Valve Senior. Preamp tubes biased a bit hot, power tubes (6V6s) cathode biased to right around 15 watts each. Getting the preamp and power tubes calmed down, but I don't get the reverb design. It uses the same OT as the Deluxe Reverb, as well as the same reverb transformer, but instead of both sides of a 12AT7 driving the transformer, well, like I said above.
Thanks as always Uncle Doug. Your videos have given me a great way to pass the time during quarantine.
Glad to help, Garrett :)
Doug, Yet another great video! I can't wait until the next one. I may have to build one of these Reverb Units. I just need to wait for your schematic.... The truck looks great too. I hope to reassemble my '46 Willys CJ2-A, early model.before I kick the bucket, but I'll probably keep the shifter on the floor where a previous owner used a can opener to cut a hole in the floor. ;) I will clean up the can opener shreds and install a plate/ring around the hole where the shifter sticks through. I still have the original 60 HP four-cylinder that came with it, along with the Jeep's low gearing, so it can only do ~51 MPH (my Dad followed me in his car to measure how fast I could get it to go). But I'll never match the great work you do on your trucks. Keep up the great work on your amps and old trucks.
We hope to have the schematic ready soon, Bob. Sorry for the delay. Those old flat-fendered Jeeps are quite popular. It sounds like a great project. I hope you can find time to complete it and send us a photo of the finished product :)
That is a clean build Uncle Doug .....
Thanks, EJ.
My parents had a Chrysler New Yorker in the 60s. That car came with "reverberator" as part of the stereo. It was always fun to fire it up. But it was so strong that it mostly just distorted the sounds to unpleasant levels. Another effect that it had was that it became unstable whenever there were bumps in the road. Railroad crossings were horrendous. That became my first car when I hit high school. :))
Have you ever played with the sheet-style reverb units? They take a sheet of metal about the size of a sheet of plywood. The sheet is shock mounted in a frame. Input transducer(s) is/are mount directly to sheet. Then a microphone is mount away from the sheet in another frame that can be moved closer or farther from the metal sheet. These units need a room of their own to avoid "contamination" from other sound sources.
Love the trucks. I have always wanted a old step-side in surf green with a nice wooden deck in back.
Thanks, CK. I foolishly installed a reverb unit in the trunk of my '65 GTO for the rear speaker. What a nightmare. Just like you described :( Here is a wonderful discussion of plate reverbs: theproaudiofiles.com/plate-reverb/
Oh my goodness! What a truck! Very nice finished build Uncle Doug. Oh yeah and thanks for the reverb tutorial! A Plus!
Thanks, George :)
I always thought Chevy small blocks where invented to put into Ford’s! But then again that’s just me. Beautiful truck 40 Ford’s and 27 T’s and model A’s have always been my favorite Ford’s. And of course can’t forget those 36 Ford’s !
Thanks, Jesse. Chevy engines are readily available in my area, and parts for them can be bought at any Autozone for a pittance. It makes practical and economic sense to use them.
Wow! What a great video! I had always wondered how the reverb tanks in by Fender and Epiphone tube amps worked. I had a lot of misconceptions.
This video gave an excellent explanation on this rarely covered topic!
Thank for another great lesson Doug!
And what a beautiful truck! I love the black cherry metallic and the basketweave interior. The oak bed is gorgeous!
You're welcome, Steve. Thanks for all your very nice comments :)
You knocked another one out of the park Uncle Doug! Great instructional video and beautiful Ford/Chevy truck! When you're building something from parts as a hobby you enjoy, who cares about other people's OCD hang ups, they need to get off their asses and do something creative like you do rather than criticize. I look forward to every video you put out there!
Thanks so much, Thomas. Glad you enjoyed the video and the old Ford truck. Purists who espouse total originality apparently never tried to drive an 80 year old vehicle in modern traffic, let alone the Interstate. It's quite possible to have nice, original looks with modern performance.....the best of both worlds.
Ok Uncle Doug, I have to say that I was eating popcorn when gave your analogy and I choked on the popcorn from laughing so hard... so no more eating will learning from your videos... lol.. love the truck, Beautiful paint job. Truly amazing
Thanks, James. Sorry for the choking incident :)
Just as I was about to shut it down I see a new Uncle Doug video. Missed my bedtime but: A) It's worth it and B) I'm on vacation.
I'm glad you joined us, BB, but hope we didn't keep you up too late :)
Catching up on my Uncle Doug videos. This one did not disappoint. Loved the Ford as is!!
Thanks, Michael :)
I Love Eric Burdon! When I think of All the Good Times!
Me too, Justin :)
I read that Neil Young ( who should know) has his reverb tank mounted directly below the floor at each venue before he performs, for just the reasons you stated. Lovely truck, Doug. Be well and prosper:)
Thanks, Richard. I swear that I recall some musician who would actually suspend a 6G15 (I believe) with ropes above the stage so it was not in contact with any vibrating surface.
A sumo practicing his flamenco. Love it. Great explanation of reverb tank and circuits.
Thanks, Ric :)
Interesting video. I had a fender reverb unit years ago. Shoulda kept it. Frankly, I like what you built better!
That Ford truck is beautiful. Great job. By the way you’re pilot announcement was fabulous! Be well.
Thanks so much for all your very nice comments, Richard.
Hey Doug, I built one from the original Fender 6G15 Schematic last year...thing works/sounds great ! The only drawback is where the HV caps are located in the front section of the chassis does not have a protective cover as the reverb tank assembly hits the cover but there is well enough space for the caps. I may eventually put these caps inside the chassis as there seems to be ample room !
I can see why you're concerned, Tom. I put the filter caps inside the chassis, thank heavens, and have no problems. I did place a metal partition between the power supply and the rest of the circuit.
Thanks for the reply...I saw that video and will do that ! Again, many thanks for all the videos and great explanations. I'm an amateur radio op and mostly deal with RF and all this audio stuff is new but I still dabble w/vacuum tubes. My other buddies say I'm lost ;-))Best amps are those that have a full complement of vacuum tubes !
You're welcome, Tom. If you fully understand RF, then AF should be a relative breeze. Amen to your preference for tubes......they've definitely got "soul" :)
Doug your videos are the best ...
( Educational and Entertaining )!!
@ 14:30
Voltage = Green Hornet { Van W. }
Amperage = KATO { BRUCE LEE }
Thanks, Wayne. Voltage = Wrestlers yelling at each other, Current = UFC match :)
Fun Fact:
The spring reverb system was originally developed by The Hammond Organ Co. The first design was a 3' tall vertical unit, with long springs encased in tubes full of dampening oil; with a complex set of levers.
Their second design involved hanging the springs like a necklace (Hence it's referred to ass necklace reverb).
When they developed their third design, which is the basic design still used today, the spun the division off as Gibbs Research Co., which became Accutronics.
Very interesting, Scott. Thanks !!
I love the analogy! @14:05
Weird analogies tend to stick with you longer :)
Agreed!
Great looking amplifier along with a great looking truck :-) you can tell how you take pride in the work you do. Thanks for another great vídeo.
You're welcome, Daniel :) Thanks !!!
very very good explanation Doug, thank you sooooo much .
You're welcome, Ron :)
Nice video on the reverb unit! I have a strong interest in tube reverbs and reverb units. I recently made a video featuring my AMT TH-1 pedal (AMT Tube Hall). Although it isn't completely analog and isn’t a unit, I still enjoy its sound. Adding a phaser makes it sound like a dream. Your video has inspired me to explore this further.
Thanks for the nice comments, MB. Good luck with your experimentation.
@@UncleDoug also wanted to say that I love your work and generosity so much. When I discovered your channel a few months (or years?) ago it really motivated me to stop being afraid of circuits. Had a blast (and a few non-lethal shocks) since. Thank you thank you thank you.
@@marclouis-boyard You're quite welcome, MB :)
great stuff -look forward to part 2
Thanks, Mitch.
Always excited when I see a notification that you have uploaded another fine video. Once again no disappointment... thank you, looking forward to part two! : )
You're welcome, Scott. I'm glad you enjoyed the video :)
Due to a lot of work this week i had to save the best for the weekend. Great video again Uncle Doug! And WOW for the truck, what a beauty. Nice work!
Thanks, Sebastiaan. Glad you liked it :)
Awesome truck. I have a 68 Camaro lots of fun. 396 Big Block
Thanks. I'll bet it is :)
i love these multi-part videos! allows for more details in the build and gives me something to look forward to. really excited for your take on the fender reverb!
Thanks, Joe. Some topics just require more time to cover fully.
That tank at 18:38 looks exactly like one that I hung on my wall. It's from a 2001 Marshall VS100, I gave it to dear old dad for inspection, and he said one of the connections between the jacks and the transducers was toast, so I just bought a Mod replacement tank and went on my merry way. I thought it looked cool so I stuck it on my wall
I prefer MOD tanks also, Dom. Good luck with it.
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You're welcome, Jude.
Uncle Doug: Another incredible video, and I also want to compliment and thank you for using the "ass kicking" analogy instead of the overused "water in the pipe" analogy.
The old Ford was the cherry on the cake and there's nothing wrong with a 305 for the highway,. I don't know if the data exists to back me up but I would wager there are more SBC engines in street rods than Fords. Nothing wrong with a SBF but Chevy has a very strong following among street-rodders.
EVERYONE - Subscribe to Uncle Doug's Patreon channel ASAP. Do it for Jack. He needs his catnip ASAP!
Thanks so much, Sluggo. Glad you liked the analogy and the old truck. In my area, it's about 80 to 90% Chevy engines, with Fords being rather uncommon. I truly appreciate your encouragement for viewers to become patrons.
Uncle Doug...That is simply the best explanation of reverb tank operating theory that I have ever heard! Thanks for that...and I'm looking forward to the final modified circuit. It's already on my 'must build' list!
...and the '40 Ford 'resto-mod' is to die for!! Sure, a restored flathead, or even a 289, might have been nice. For dependability and relative simplicity (small-block Chevys are easily the most often transplanted power plants. As such, everybody and their third cousin make parts to accommodate those transplants, do they not?), though, you can't beat a small-block Chevy...with auto trans for those of us tired of playing around with a clutch all day! The whole project is a winner...and the bed was definitely worth the extra effort, as was the interior! Very cool ride! :-)
You're welcome, Norm. I'm glad you liked the '40 Ford truck, and sincerely appreciate your very nice comments.
Sir, this is just distilled awesomeness.
Thanks so much, Fabio :)
i am subscribed to a lot of channels, this one is the best by far.thank you
You're welcome, Gabi. We'll keep on trying to be your number one channel :)
Glad to see you back, Uncle Doug ! Greetings from Brazil !
Thanks, AM. Likewise from Texas, USA :)
nice analogy sir doug
Thanks, PJ :)
tops.. looking forward to this series fo' sho... very nice verb box indeed..
Thanks, GM :)
Beautiful truck, by the way. Love the color.
Thanks, Francis :)