The Amp Garage

Here is a clip I made:

https://youtu.be/5jZdO79Eefc?si=hpVXii99y8UYQN-o

I finished servicing the amp. It is quiet, very powerful, and does sound great. I'll leave it as is for now. I cleaned all the pots and touched up the most critical solder joints. I will add a muffin fan to ventilate and I may opt for some Neo speakers in the future, as this amp is very heavy as is....

Performed the cap job, replaced the tubes, balanced. It sounds pretty good, but all the pots need cleaning...I will clean later tonight and report again...

martin manning wrote: ↑Thu Apr 10, 2025 3:58 pm Do you know what the primary impedance and screen tap voltage ratios are?

1K7 Primary. Not sure of the UL ratio.

I have another idea. What about converting the power section to four KT88's?

Do you think the OT would be close enough to use safely?

I was able to order caps and a matched sextet from Antique Electronic Supply. I'll just get the amp functional and see what it sounds like for now...

Oh darn...

I thought about the individual pots for the bias, but its too much work for me at this point, oof!

I was toying with the idea of making it a bass amp similar to the Mesa D180. But, I might just get it up and running and pass it on to some one else...

I was gifted a Super Twin Reverb and it is going to need a cap job and new power tubes. But I'm wondering if I should modify it or just leave it as is? It is very heavy. Perhaps put Neo speakers in it? Or?

Would love some suggestions, schematics, etc...

So I assembled it and am happy with the results...

https://youtu.be/FMvq31hmbhU?si=8Z8jCHMApKHB6Wo2

https://youtu.be/0riuT8hAc6A?si=DtLLxunN0uldhM1l

Welcome back, fusionbear! I only know it's you because of your parallel post on TGP... I've been hunkering to build a high power clean amp for myself just because. I don't need it, but I find it therapeutic to build... I love the feel of old twins, but wanted to build something a little different j...

As the title states. Worth pursuing or a fools errand? I'm thinking of a last build with a AB763 preamp into a bass spec 100 watt power amp section. Has anyone built it? What were the results? Worth trying? I'm thinking of a low filter spec like the early plexi types to keep it spongy like a twin re...

I like to mod the normal channel with two simple component changes.

1. Switch the 820 cathode resistor to 1.5k
2. Switch the .022 coupling cap to .01

That's it...