Відео

I have always heard that the first channel has a better sound. The reason they say is because of what happens when it goes through the Reverb conversion thingy. Conversion may not be the right word but I think you know what I'm saying

What about any "death caps"? Also, using Deoxit Gold on pots and contacts is good practice.

I'm just a player. But it seems that JJ's are more modern-sounding (having a wider dynamic frequency response) than say a Winged C.

I got a hernia just looking at that amp.

You absolutely CAN retension the mini 9-pin tube sockets, with a tiny jewelers screwdriver or dental pick; I've done it many hundreds of times over my 50+ years of audio electronics repair. It seems I'll have to post a video showing how......and also, how to replace a broken socket contact rather than having to replace an entire socket just because one contact broke (perhaps necessitating drilling out rivets on some amps such as Silvertone, Danelectro etc), which I've seen other techs do, making unnecessary additional work for themselves. One other thing; leaving the earth ground and power supply grounds connected to the transformer bolts is a bad idea; those connections invariably loosen with transport and speaker vibration. Modern electrical code specifies a dedicated earth ground connection; soldering the green wire directly to the chassis is more secure, and safer. Same applies to the negative-bias ground; if that ground loosens it spells disaster for transformers. Get out the BIG IRON and solder it direct to the chassis.

Wow. What a sound

Hello Gentleman, great information and equipment you have! I have this amp and I changed the power tubes because a crackling sound when volume at max, now it sounds great when cranked but the bias never set down to 30mV on one side, minimum I got in that side is 70mV. Any comments from you will be helpful.

I have the same receivers that I turned on my receiver this morning and it says protect mode not sure what’s going on. Also, it gets kind of warm when playing for an hour and a half. This is the first time I’ve been into this protect issue. I’m running a 4.1 surround sound Two. Clips subwoofers, and two tower speakers by klipsch do I need to rewire my set up again is the receiver good enough to run the my set up the receiver I think was $400 bought it three years ago

Hola, cual es el punto débil de éste amp?

hmm it does not look original, more like an almost exact clone - speaker is no the original one, sticker as well

Hey Borg, I really enjoyed this series! I just got done building a replica 5E3 cabinet following the same plans. I was wondering, in regards to the leather handle, how far apart are the 2 metal brackets that hold it supposed to be? Is there an official Fender spec? I just kinda want it to look as close to the real thing as possible and I don't have another tweed amp to use as reference. Awesome job on yours and it sounds great!

Wow, really cool and thank you for sharing! My father recently passed and left behind an interesting stereo I want to keep but it starts in protect mode. Which is a shame because it has a dock for a gen 1 iPod (which he has) and I could dock/listen to his entire music collection. Not sure if his situation is the same, I had taken it apart and seen some videos showing a failed fan can cause this error. The fan is standard 3pin/2wire connector but it's thinner than a PC fan so I'll have to pop by a hardware store and see as it seems fairly common. Regardless, if that's not it, it "could" be an issue with the ICs but before dedicating any amount of time into this (as I'm pretty inundated atm) I just can't see myself ever getting around to it and they're taking up space. I guess this is why they say one mans trash is another mans treasure.

Boy. Those innards are clean and beautiful. BTW: Been playing jobs since 1963 (retired in 2002) ... played MANY jobs with the dreaded "death cap" and ground switch. In fact: I NEVER played a job without them! Still here in 2024. But I can understand your concern! Good on you.

Can’t watch. Hold the camera steady!!!!

Why would higher plate voltage and decreasing the plate current cause Crossover Distortion issues? compared to lower plate voltage and high plate current has less crossover distortion.

Nice video - I enjoyed seeing how its put together and hearing your views/knowledge.

Hi Borg! Ive modded this series of amps since 1999.....i like ta put a Military spec chip carrier in the reverb n channel switch opamp spot, the fx loop, i dont..........cheers!

Nice work. If you do another in the future use a hair dryer or heat gun to help make the tweed more pliable and to reactivate the glue. Heat works.

The toroidal power transformer is a clue about the build quality.

Very well made video. Awesome job! Thank you for sharing this.🎸🎶

Very thorough and educational! Thank you for all your knowledge and skills. Very impressive! Can't wait to see your next podcast. Have a great one...👍

That's some good quality video from 1970,jk. I got a sony receiver with same protect issue. Gonna have to take out the board and check for cold solder joints. Great video by the way.👍

great project. Nice work!

Nice work !!

right on,I 'm going in tomorrow to check my amp out. After wasting time trying Sony's B.S. fix, which was unplug it wait 30 minutes and it will magically work. LOL or "make sure the speakers are correct ohms"

Im not a tech guy but may i know what specifically is the problem?

Man, I love the fact that you called b.s. on the whole "unboxing" trend and refused to go that way. I get so effing annoyed when people do that, lol! Excellent video, sir!

A nice little amp!

That’s awesome.

That’s my amp! And it sounds great!

I could immediately from the get-go see and hear that we have a master at work here. Subscribed in a heartbeat!

Where did you get the tweed covering? I,I've looked for it but can,t find a supplier!

The best Hendrix sound I ever got came from my 70's silverface Champ...go figure

This is my amp! Custom deluxe. Sounds amazing. He also re-built my abused ‘58 Princeton amp and rebuilt, my 70ish Vibro Champ. They all sound great. Clear,Bell-like sound just like Leo Fender would’ve wanted.

Thanks for this video, good info! I'm a bit late with this but Sony has provided a bottom opening for accessing the main amplifier board's solder side without the need to yank it out. Just undo six screws and off comes the lid 😁

I noticed on my solid state amp the clipping performs the same as you shown here, top cuts first. Service manual says adjust for even clipping at full volume. It has a 100k clipping adjust resistor near the start of the amp stage.

They really did build those old JC's well. Good clean workhorse amps.

I have a str-de675 with this issue maybe has the same problem

Biasing concepts have been shrouded in mystery for many many years. Much of it comes from the vendors saying untruths about their amp design. Vox is one such vendor; there are many others though. Cathode biased amps are really neat in a few ways. One is that you can essentially bias them as if they were class-A, and they will survive. Mainly because as you play louder and louder, the bias will actually cool off more and more. The biggest concept to grasp is that Cathode biasing does not = Class-A operation. Class-A operation can only exist in single ended designs. If you play loud enough, at some point, no matter how hot you bias a cathode biased, Push-Pull amp, the bias will cool down enough to operate in Class A/B. The big thing to remember is that in Class-A, the tube NEVER shuts off, and is conducting 100% of the time. In Class-A/B, one tube or the other is in cutoff ( not conducting ) for at least some amount of time. If a tube is in cut off, even for a fraction of a second, it is not Class-A operation, period. For cathode biased, push-pull amps, I shoot for about 95% of PD ( plate dissipation ). Much more and you stand a good chance of burning things up permaturely. Anything less than 90% of PD in cathode biased amps is probably going to be too cold, and Crossover distortion will be prevalent. Crossover distortion is the sign of an amp biased close to, if not in Class-B operation. Randall Aiken's White pages are good resource for dispelling myths and BS. There are many old wives tales that exists. And it is true, you can pull all but one power tube in a 100-watt, 4 tube power amp, and it will operate just fine.

This is my wakeup call: everyone is saying this is an OLD amp...I see something new!

I had one of those, and it eventually developed a similar problem. That one is in nearly new condition!

That is an interesting failure. If you have the schematic, I'll bet it shows the reverb in series after the preamp' that's probably why the signal was cutting out completely. Some amps have the reverb in parallel.

Very interesting look at a cool old amp. Thanks for sharing.

Brilliant. I watched from start to finish and subscribed.

Thanx for this... You got my sub... Cheerios (but not the cereal)

Mine is an August '56. (FH on the tube chart) I've had it since 1988. People yell at me when I tell them that I added a bypass cap to the second stage of the 12AX7 and disconnected the negative feedback loop. That makes it really kick ass for harmonica as well. The cabinet on that one looks way better than mine, but that's OK. Mine is ugly enough that nobody wants to steal it. People are weird. when they see it, they hold their noses and get out cans of disinfectant. (It doesn't smell bad, I think modern people smell with their eyes,) They don't want me to bring it into the house, then they hear it, and try to buy it from me for 5 times what I paid for it. There's scene in "La Bamba" where the sax player sees Richie's Tweed Champ: 'What the hell is that?" "It's my amp" 'That looks like something somebody threw away" "Yeah, well it's mine now" The next time mine changes hands will be at my estate sale. I just hope whoever has it after I'm gone will understand it and appreciate it.

LOL! Love the unboxing comment ... so much truth brother! Loving this series.

Does the wood you use for the cabinets affect the quality of the tone it produces? It seems everyone worries so much about the woods used in their guitar and they pay no attention to wood where the actual sound comes out of: seems strange to me.

Very cool mate. Looking forward to watching the rest of the series 👍

😮this narrator sounds like "Brad Paisley"