voltages

Hello out there in Marantz land! I have been working on this beast of a receiver and it has been going pretty well thus far. The original problem was the main filter caps, one deteriorated internally but luckily it didn't take anything out with it. I did my own version of the restuffing them...

I’ve got a heathkit aa-21 early solid state amplifier that I’m working on. It was a basket case when I got it. I’ve got it to the point where at least it’s not blowing transistors immediately. Right now I’m only working on the amplifier section. I’ve got the preamp disconnected from the main amp...

I have a rebuilt the power supply, the protection board and the amp board with all new caps and transistors and checked the diodes mounted to the heat sinks and replaced all adjustment pots with new Bourns according to the AK post available here. I have done this before any times on different...

Greetings fellow Ak'ers! This puzzle has me stumped - any good puzzle solvers out there wanna try it? I have rebuilt a Kenwood KA-3500 amp with a full recap, many transistors, resistors and diodes, and new Bournes trimmers, too. This is my 12th recap of this model, but I'm stumped. The Left...

Can't set Bias on a KA-7100 Having a problem with an ineffective bias trimmer on a Kenwood KA-7100. Got a KA-7100 to restore and after initial DBT test and a little de-oxit I tried setting the trimmers for center voltage and bias before the restoration. The Left channel trimmers would not...

hello everyone, recently i managed to find this 6300 for 25 dollars obiously it was (and still is) in very bad shape, but for the price i couldn't go wrong, so as you might imagine it came with some issues. cosmeticaly: needs alot of work, needs re-veneering, new paint for the platter, needs 4...

Hello all! Let me say thanks to anyone who responds in advance! So let me start by saying that I know squat about electronics though I have started doing some reading. My only hands-on electronic experience is putting together a kit or two from radio shack when I was a kid. Now that we've...