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  1. Replies
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    Have you tried simply cleaning and maybe...

    Have you tried simply cleaning and maybe re-tensioning the tube sockets? You keep mentioning that touching a probe to tube pins makes things change. Maybe you're jiggling something into being bad and...
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    Lol wait, is this true? No, can't be, can it? ...

    Lol wait, is this true? No, can't be, can it? I've always wondered why the Canadian Marshalls don't have 16ohm taps.
  3. I have no expertise to add, but I will say that...

    I have no expertise to add, but I will say that there about a million JTM45s out there that aren't having any problems with the stock circuit. You don't need to fix a problem that doesn't really...
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    Not anymore. I left that game around 2008. I was...

    Not anymore. I left that game around 2008. I was mostly doing drag racing engines and offshore powerboat stuff. And of course the usual wannabe street racer jobs.
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    I can't even pick one, though I've tried. Being...

    I can't even pick one, though I've tried. Being an auto mechanic-turned-race engine machinist, I have a lot of very specialized this-only-does-one-thing tools.

    Probably if I was forced to pick one...
  6. Right? I don't really drink coffee because I love...

    Right? I don't really drink coffee because I love the taste. I drink it for the legal speed rush. One cup of coffee is for little old ladies. My "one cup" is actually like four cups, and I fill it...
  7. The knowledge base here is pretty damn...

    The knowledge base here is pretty damn exceptional.
  8. Check that those big caps aren't shorting to the...

    Check that those big caps aren't shorting to the chassis.
  9. Replies
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    I installed a 1.3k/2w. Best I could find locally....

    I installed a 1.3k/2w. Best I could find locally.
    I also have a 1.5k/5w, but it's awfully big for that little area.

    Just for my own amusement. I scoped the 6v6 output going into the tank and...
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    Will do. Thanks. I was gonna overdo it anyway.

    Will do. Thanks. I was gonna overdo it anyway.
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    Right, thanks. I'll be addressing the screen grid...

    Right, thanks. I'll be addressing the screen grid resistor this weekend.


    I'm starting to get it, thanks. And what enzo said...it works so don't mess with it. Lol. I'm just trying to wrap my head...
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    I haven't noticed any redplating on my modest...

    I haven't noticed any redplating on my modest little single ended 6V6. My bias is relatively cool as well. The secondary of my incorrect transformer matches the reverb tanks impedance, but the...
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    Agreed, I understand that. But how far off is too...

    Agreed, I understand that. But how far off is too far?
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    So it's like a "reflected load" kind of thing? So...

    So it's like a "reflected load" kind of thing? So which side is more important to "get right"? Primary or secondary?

    In real-world applications, I've mismatched amps and speakers a bunch of times....
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    Cool thanks. I'll check my stash and get on that.

    Cool thanks. I'll check my stash and get on that.
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    Thanks. I'm glad you recommended that one. In my...

    Thanks. I'm glad you recommended that one. In my own hamfisted "research" I determined that's probably the technically correct OT.

    I'm currently using the 1750A because I had it laying around and...
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    Thanks, I do appreciate and value your practical...

    Thanks, I do appreciate and value your practical input.

    I guess my main issue, for now, is just what's actually going on in this reverb unit with my mismatched, although working, reverb tranny?...
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    Wow, you aint lying. That is complicated....

    Wow, you aint lying. That is complicated. :confused:
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    I mean "better" as in healthier for the tube, OT,...

    I mean "better" as in healthier for the tube, OT, proper operation of the circuit, that kind of stuff. If it doesn't matter, it doesn't matter, and I'm thrilled with that. I'd just like to know why....
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    Haha thanks. I'm not trying to be excessively...

    Haha thanks.

    I'm not trying to be excessively nitpicky, but I do want to learn. Pure dumb luck can only go so far! If I used *technically* the wrong output transformer for this reverb unit, but it...
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    Understood, thanks. Do I hear anything that...

    Understood, thanks.

    Do I hear anything that sounds "wrong"? No, not really. I'm just wanting this project to be the best it can be, and learn more in the process. I have noticed the dwell control...
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    Hey I know you told me to stop fixing it, but I...

    Hey I know you told me to stop fixing it, but I have a question.

    I'm running a 6V6 driver tube in this thing. I also, maybe foolishly, used a Hammond 1750A reverb transformer I had laying around....
  23. Wait, this is real? Audio tampons?

    Wait, this is real? Audio tampons?
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    Lol fair enough.

    Lol fair enough.
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    Update on this thing....it's finished. Sounds...

    Update on this thing....it's finished. Sounds clips in here VVVV too.
    https://music-electronics-forum.com/showthread.php?t=50291

    It works great, it's had a little time on it, everything seems...
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    Just be honest up front and you have no further...

    Just be honest up front and you have no further responsibility. Your responsibility goes as far as you're willing to let it. In a private person-to-person sale of a used item, it is implied as-is...
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    I get that. We're kind of in the same boat. I'm a...

    I get that. We're kind of in the same boat. I'm a player too (not a good one) and playing and recording is my main focus. I play in three original bands and do a lot of recording of myself, my band...
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    Build one! :thumbsup: I built mine as my first...

    Build one! :thumbsup:

    I built mine as my first project. I'd messed with mods and repairs on lots of Marshalls, but never built an amp from scratch. I figured, what the hell? Might as well go...
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