Tube Amp Archive

Hello,I don't think you need a kit. Get a schematic and order those parts from Amplified Parts. Slightly less expensive and much more immersive, proactive wise. The amp I built (5e3) is the best sounding amp I have ever played thru. If you have never built an amp before I would chose a 5f1,well wort...

I think you found a very bad place to start. This is for very experienced techs.

Get a small amp kit, like a Fender 5f1 from Weber. It's a easy yet rewarding build. Then read everything on Rob Robinettes web site, watch every utube vid that Uncle Doug and D=Lab put out. No need for an Electrical Engineering degree to build an amp, go for it and have fun.

I have since come to the conclusion that this circuit is not the way to go. Way too much gain from the extra 12ax7. Eliminated that 12ax7 and tied the reverb, in and out, to just after the tone stack. Works perfectly!!

Thank you all for your advice! IT WORKS and sounds great. The schematic that Ten Over provided did the trick. How ever I did not have in stock the 3900 ohm or the 11k ohm, those will be put on order. I left the originals in, I hope that doesn't affect anything. The amp had a problem with squealing, ...

Ten Over, A few questions.... I have never seen a 3900 ohm 1w or a 11k ohm resistor before. I'll have to search Amplified Parts. I see that you're recommending using point C (387v) to feed the reverb driver instead of 432v point B. The schematic says +400v on the plate of the 12at7, any reason for t...

Hello I'm trying to add reverb to 5f2a so far without success. I started a thread and have gotten some suggestions that I will try. Were you able to get it running to your liking? I tried hooking it up like I thought Fender did and it didn't work at all. I can't rule out user error though! I'll be w...

Yes the Hammond 290ax is the same PT I used in a Princeton Reverb build. I also calculated the current needs as follows: Heater current. Plate current 6v6 450ma. 30ma (2) 12ax7. 600ma. 4.8 12at7. 300ma 20ma Total. 1.35A. 54.8ma Hammond 290ax 5v HTR = 3A 6.3 HTR = 2.5 High voltage = 100ma The 290ax s...

Yes that's what I was thinking!! Wow..... thank you so much for the drawing and your time to amend my drawing. I may take a couple of days to rewire the circuit, but I will let you know what happened.

So it's confirmed...... I can add a spring reverb to a 5 watt amp?

Phil thanks for the tips. I was wondering if I needed the other half of v3. I interpreted the use of the other half of V3 in the aa1164 as necessary to the circuit, guess not. Question about the V3 tube, you said it was not configured correctly, is that because there are two grid leak resistors show...

Hello, I am trying to add reverb to a 5f2a amp that I built. The reverb circuit is from an aa764. Anybody have any ideas where to hook this up? Here's the back story. I hooked the reverb circuit onto the 5f2a as shown in the schematic below. It did not work. The amp was cracking and popping through ...