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Discussion in 'Shock Brother's DIY Amps' started by ArcticWhite, May 17, 2018.
The problem is that it doesn’t have a 5v heater tap. Only the 6v.
I'm slow, but at least I'm dumb enough to ask the right question.
I think I may do RobRob's switchable solid state rectifier.
Are these the correct diodes to order for this project?
In taking a look at the schematic of the GA-20T, I'm struck by the line of 0047uf caps in channel 2.
Are these part of the tremolo oscillator?
The oscillator is the 3 down below. The line of them is a low pass filter that only lets the the oscillations threw and not other unwanted noise.
Anyone got a gut shot of a GA-20T with the board flipped over?
I don't see those five 0047uf caps in series. Are they under the turret board? Doesn't seem like much room. What type of caps should I use here?
You should use a high voltage cap for the first in the string, the others can be whatever just.need to be able to take the signal voltage.
In an amp from that era I'd kind of expect to see ceramic caps used there, but I don't know what Gibson used. I'd be surprised if they are under the board, but maybe.
As they are in the signal path, should I use polyester, polypropylene or something other than ceramics?
Lots more info on the GA-40 and that board is double sided so it could be. Going to be an interesting build.