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  1. I have a Hi-Fi (Zenith amp) I converted to a...

    I have a Hi-Fi (Zenith amp) I converted to a guitar amp that has your two problems (cathode bypass cap on V2 kills theTone controls), and Bass control that sounds like a volume control just adding a...
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    I never thought of it that way, but next time I...

    I never thought of it that way, but next time I have to shell out for Pizza for my band, I will think of this. :thumbsup:

    I have thought about every large household purchase in the currency...
  3. Sounds Good ! all your stuff does. Your work...

    Sounds Good ! all your stuff does. Your work speaks for itself.

    It's generally not good to brag and have a big head, but you are good enough that you should feel some level of pride, and don't...
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    Nice nosaj, you know how to proceed with trouble...

    Nice nosaj, you know how to proceed with trouble shooting.

    Enough conjecture and supposition. Need to measure the remaining elements, bisect the circuit, and find the faults !
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    Yes indeed, plenty old tube Bass amps out there...

    Yes indeed, plenty old tube Bass amps out there that would serve the pedal platform purpose well. One thing that might be obvious is how a bass amp will fill in the bottom end of a guitar,...
  6. Thanks Jazz P Bass, Enzo, and Helmholtz. I...

    Thanks Jazz P Bass, Enzo, and Helmholtz. I thought it might be just the power for the plate pin #6, but I wasn't sure, owning to my self taught status, up to this point.

    So the plate #6 and that...
  7. Thanks. I never thought the amp was "real"...

    Thanks. I never thought the amp was "real" stereo, but there are two signal paths running out from the V1 tube and combining later on so that would be a mono amp as you stated, still it starts off...
  8. Don't Understand Schematic, A Butchers rebuild.

    I recently bought this old Zenith(labeled a Stereo amp) Hi-Fi amp and so far have successfully converted it to a guitar amp, and it sounds pretty good !
    56492

    But... I essentially did a hatchet...
  9. I too have used an L-Pad just as an experiment,...

    I too have used an L-Pad just as an experiment, and I agree that if you don't shave off too much wattage (about a 6DB drop or less), they work quite well !

    They also add some audio compression,...
  10. Nice !!! I would be proud if I were you, good...

    Nice !!! I would be proud if I were you, good playing !

    There's a place for every sound under the Sun, my Son !

    At the right moment, and at the right time, with some good playing and a good...
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    Started the Schematic ! Keep getting interrupted...

    Started the Schematic ! Keep getting interrupted with life matters, but about 1/3 done (maybe). I can see that this will help in the future, even though at this point I am slow, and failed my visual...
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    Yes, it's a ClassicTone ! It doesn't overheat or...

    Yes, it's a ClassicTone ! It doesn't overheat or anything, and I have 625v TDK resistors connected between both HT leads and the CT to guard against overvoltages, but I am toying with the idea of...
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    Wife had me doing the furniture store tour...

    Wife had me doing the furniture store tour today... once that important and life enriching task is completed, I will have more time to get back to what matters, and I think you all know what that...
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    I think it would be considered a "grid leak...

    I think it would be considered a "grid leak resistor as it appears directly after the coupling cap, and is tied to ground. However...

    The "other" tube I didn't change the resistor for is probably...
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    You may be onto it as well Helmholtz. I am...

    You may be onto it as well Helmholtz. I am running a "20W" OT, but I would think based on the sturdy power transformer, and the high plate and screen voltages I am running for the pair of 6L6s, that...
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    Thanks Chuck, I will play with the values of the...

    Thanks Chuck, I will play with the values of the 6L6 tubes as you mentioned, I just may not use 150k owning to the fact of the .047uf caps I newly put in... But those could be changed as well....
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    "Swirly" Distortion Decay Sound Fixed !

    Some of you might remember a while back I had a weird high frequency swirly type distortion present on the decay of high gain power chords in my modified Gretsch 6156 amp. That amp uses two 12ax7s up...
  18. 426vdc is While running, and as you know there is...

    426vdc is While running, and as you know there is a brief exposure to higher voltage (peaks briefly at 540vdc) on startup. I will order a few 600v 47uf caps. It's the first one off the B+ that will...
  19. Only a power and an output transformer, no...

    Only a power and an output transformer, no chokes. The tubes are 6J7, 6KS7, 6SN7, and two 6L6s.

    Thanks for any help !
  20. Till this point I haven't had the confidence to...

    Till this point I haven't had the confidence to draw any circuit, but I think your advice is good, and I will attempt it as part of my learning and initiation. Probably have something later today....
  21. 6.8 vac, again a bit high, and I think you are...

    6.8 vac, again a bit high, and I think you are correct about the wall voltage being a part of the problem. I do have an inexpensive surge protector that automatically limits wall voltage to 114vac...
  22. I checked the 6L6 coupling caps and no DC voltage...

    I checked the 6L6 coupling caps and no DC voltage leaking from one end to the next. Those are the best looking caps of the lot, so I left them in, but I will take your advice under advisement just...
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    I think that is the problem here, and you are...

    I think that is the problem here, and you are correct.

    I have quite a few 6V6 metal can tubes, and they work splendidly in a couple of my Valco amps, but I believe this amp is stretching the...
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    I think I ran into just that type of problem when...

    I think I ran into just that type of problem when I got the amp up and running tonight. I added some more resistance to the screen power supply node, and that seemed to quite things down a bit. I...
  25. Do you have the schematic for this amp ? ...

    Do you have the schematic for this amp ?

    That's what I was looking for in my other post.

    If you have the schematic, please post it, and I will be eternally grateful !

    And once again, Thanks...
  26. Tried again, this time using alligator clips...

    Tried again, this time using alligator clips attached to the leads so I could get a really good "Bite" on the wires of the two resistors, and they are out of the amp entirely... Nothing, not using...
  27. I will try to do just that. I actually got a...

    I will try to do just that. I actually got a better view of everything just tonight. I am not quite as up on this stuff as I might seem, LOL, but maybe that would help. One thing I did was pull the...
  28. 224 ohms each side spot on. I just added some...

    224 ohms each side spot on. I just added some more resistance to the cathode resistor from 180 ohms to 230 ohms. I think I should have gone a bit further, as now one of the tubes is still at around...
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