Thanks for all the advice thus far, folks! Here's a couple recordings of the amp. The first one is the amp with no production effects. I do turn on an OCD to give the amp more treble, as it is a little "dull" on its own. The recording is rather long, so skip around to hear various tones. I get to the overdriven tones near the end:
https://soundcloud.com/brianstewart-1/heathkit-ta-16-dry
Here's a recording with some reverb/compression/somethingelse that I put on with my DAW, just for fun:
https://soundcloud.com/brianstewart-1/heathkit-ta-16-with-effects
Well, there was dc on the output, so replaced that coupling cap, which solved that problem:
The main filter cap had a bulge in the end, so I replaced that as well. I used what Radio Shack had on hand, which was (2) 2200ufd, 50v caps that I wired in parallel. The original was 4000ufd, 50v:
That pic also shows the new bridge recto and the new 3 prong cord.
Now, the only things left are the tremolo and reverb. I measured the voltages on all the remaining transistors, and they are good, so my guess is that the opto-coupler is bad in the trem. circuit. Internet sleuthing revealed a good replacement, which I will order soon.
There is no reverb tank, and I really don't want to spend the money on one yet, so we'll see what comes of that. I also need to figure out the correct tank to get. I have to match the input and output impedance of the circuit, correct? Need advice here.
I also will be building a head cabinet for this at some point, as I have nothing else to put it in.
https://soundcloud.com/brianstewart-1/heathkit-ta-16-dry
Here's a recording with some reverb/compression/somethingelse that I put on with my DAW, just for fun:
https://soundcloud.com/brianstewart-1/heathkit-ta-16-with-effects
QuoteNow what was the remaining problem?
Well, there was dc on the output, so replaced that coupling cap, which solved that problem:
The main filter cap had a bulge in the end, so I replaced that as well. I used what Radio Shack had on hand, which was (2) 2200ufd, 50v caps that I wired in parallel. The original was 4000ufd, 50v:
That pic also shows the new bridge recto and the new 3 prong cord.
Now, the only things left are the tremolo and reverb. I measured the voltages on all the remaining transistors, and they are good, so my guess is that the opto-coupler is bad in the trem. circuit. Internet sleuthing revealed a good replacement, which I will order soon.
There is no reverb tank, and I really don't want to spend the money on one yet, so we'll see what comes of that. I also need to figure out the correct tank to get. I have to match the input and output impedance of the circuit, correct? Need advice here.
I also will be building a head cabinet for this at some point, as I have nothing else to put it in.