Gibson GA25RVT conversion

[chocopower]

Hi there!


I friend of mine have this old Gibson amp. Lot of problems with noises, reverb transformer dead and he really don´t like the "too clean" sound.
Is a really hard to work amp. I think you call "spaghetti wiring". Anyway, i decided to take all out and rebuilt it from cero.


I attached the original schemo (really similar to the GA35RVT you have been talking about last weeks) and the new  schematic i´m gonna try.


Some values like coupling caps and power rail resistors are just theorical and i´m sure i have to tweak them when amp is finish.
I´m looking for any safety advice or any other idea about doing things in a different way.


Right now, im gonna keep the 7591 as power tubes cause i already have them in the amp and the are almost new JJ. When those tubes die, i think im gonna try to re-wire to 6L6, as PRR said in the GA35RVT topic.


Thanks in advance!


** Sure someone is gonna say something about the weird tone controls, but i wanna use the stuff i already have into the amp, and anyway, those tone controls aren´t useful below 12:00 o`clock with the classical 1M pot.

[sluckey]

Your schematic looks OK to me. I would build on a turret board because that makes it easy to change components if necessary. True point to point wiring (spaghetti wiring) is more difficult to change components.

[chocopower]

Thank Sluckey!


That baby already have two small boards, but in previous works someone make a really weird wiring leaving some areas and components bypassed and using wherever he found to attach components.


I going to use them in the right way. I´m working in layout (hand-draw, sorry) and i´ll post it as soon as possible asking for some corrections.


thanks!