Search:

Type: Posts; User: Leo_Gnardo; Keyword(s):

Page 1 of 18 1 2 3 4

Search: Search took 0.05 seconds.

  1. You can probably fix that too. Of course it helps...

    You can probably fix that too. Of course it helps to have a schematic. Often the problem is in the power supply, worth checking out first. Sometimes it's the CRT. I've revived a couple of scopes that...
  2. Replies
    19
    Views
    277

    Good ol' fashioned build, wires all laced up,...

    Good ol' fashioned build, wires all laced up, ready for Sunday School. I note on your schematic there's no phono input. So - on the amp is there one or only a mic input? Either way it looks like a...
  3. Replies
    19
    Views
    277

    OK, that makes sense. And you can dispense with...

    OK, that makes sense. And you can dispense with those components I mentioned. Likely you're not going to use the mic input either. The resistor between the input jack and first tube's grid can be...
  4. Replies
    19
    Views
    277

    Good point. Maybe nice big bulbous 6L6G's too. It...

    Good point. Maybe nice big bulbous 6L6G's too. It would be nice to know what's the B+, but I wouldn't stress those old caps by surprising them with high voltage after they've been sleeping for...
  5. Replies
    19
    Views
    277

    The schematic shows no taps on the transformer's...

    The schematic shows no taps on the transformer's secondary. Looks like it's indeed a 70V system or something similar. Funny thing another correspondent on another thread has us transformer hunting...
  6. Some 'a them tubes got saggy screens! And yes...

    Some 'a them tubes got saggy screens!

    And yes it IS annoying to have to personally buy inventory for an outfit that ought to stock their own. I can tell you stories ... in any case every tour I...
  7. Replies
    17
    Views
    184

    I agree. Either $155 or 130 is too much for that...

    I agree. Either $155 or 130 is too much for that kind of OT, unless it can't be had elsewhere.

    Back to Amp Parts Direct, we're looking at any of the following ClassicTone models: 40-18006,...
  8. Replies
    35
    Views
    631

    Maybe one of the "old timers" can answer this one...

    Maybe one of the "old timers" can answer this one for me. Taut-band meter? We had a very nice 'taut band' Triplett VOM on the bench at the workshop at my college. The needle always took its good ol'...
  9. Replies
    17
    Views
    184

    Enzo's is a very good question and I'm sure...

    Enzo's is a very good question and I'm sure directed at Wombaticus. "Dinky," apparently Mesa's OT looks compact compared to other OT's claiming similar power handling. My view, if there's not enough...
  10. Replies
    17
    Views
    184

    Primary impedance - you should have asked when...

    Primary impedance - you should have asked when you called Mesa. Know? I don't, but if it's compatible with both 6L6 and EL34, you could look at other OT's that are recommended for use with those...
  11. Replies
    17
    Views
    307

    Just in time for Halloween, looks like it's...

    Just in time for Halloween, looks like it's painted in blood. Might appeal to Charlie Manson types. Yikes! :evil:
  12. Replies
    119
    Views
    32,369

    Every now & then I get someone who wants me to...

    Every now & then I get someone who wants me to build them an amp from scratch. Or even better, gut an amp & build a fresh one. They expect to pay for the parts - a couple hundred dollars no more. Or...
  13. Replies
    19
    Views
    277

    That transformer may be intended to drive what's...

    That transformer may be intended to drive what's called a 70 volt system. That's how many "distributed" PA systems are wired, like those with lots of speakers in the ceiling. Like in an office, or a...
  14. Replies
    119
    Views
    32,369

    Welcome to the brave (?) new world of amp repair....

    Welcome to the brave (?) new world of amp repair. That's how it's done now. Unless you have some super dedicated microscope-eyed tech that enjoys changing out flea size components, and fixing burnt...
  15. It was just a wild guess. :D Plus, Germany should...

    It was just a wild guess. :D Plus, Germany should not be underrepresented. No shortage of good engineers & scientists of all sorts from there.
  16. We are definitely in agreement! To the owners...

    We are definitely in agreement!

    To the owners of amps with small OT's, I say what can you expect with a fingertip size core? Not much.

    Leo F after all intended the Champ to be a "student amp."...
  17. You ... are ... radical! And more guitarists...

    You ... are ... radical! And more guitarists should do similarly. There's a whole lotta good tone to be found.

    Helmholtz, fwiw I make power measurements just below the clipping point. On Champs...
  18. In Champs especially, and other similar amps at...

    In Champs especially, and other similar amps at the low power end of the spectrum, the output transformer's low frequency response rolls off at a steep rate below 400 Hz. Without a better - and more...
  19. Thanks for the reply. Late 80's when amp modding...

    Thanks for the reply. Late 80's when amp modding started to take off, some customers were begging for "more lows" from their funky old combo amps. Sometimes I'd boost an output tube cathode bypass...
  20. Replies
    17
    Views
    184

    What Enzo said. ^^^ Call Mesa for a price....

    What Enzo said. ^^^ Call Mesa for a price. They've always come through for me, and kept prices very reasonable. Shipping - I can't help you with. FDX & UPS have the world by the short hairs on that...
  21. Replies
    4
    Views
    135

    FWIW all those voltages look normal. The plate...

    FWIW all those voltages look normal. The plate v's on the output tubes being 2V different suggest one tube's drawing a good deal more current than the other. You could do a bias current test the...
  22. It depends on how low distortion sine waves you...

    It depends on how low distortion sine waves you need. Some of the old fashioned - physically large - generators had a very low distortion factor. Then solid state function generators became popular....
  23. Wondering what was the capacitance of this "huge"...

    Wondering what was the capacitance of this "huge" bypass cap that caused the problem?
  24. Looks like a hit! Just wondering, Chamberlain?...

    Looks like a hit! Just wondering, Chamberlain? One of the more obscure keyboards. If I'm not mistaken we hear some on Magical Mystery Tour, and in more modern times Michael Penn and Aimee Mann...
  25. I was gonna say, but I'm trying to be polite...

    I was gonna say, but I'm trying to be polite today. :p Don't worry it won't last long! :evil:
  26. Good on ya Onnie! For more of my views on 'scopes...

    Good on ya Onnie! For more of my views on 'scopes read what I wrote a couple days ago, posts 56 & 60 on this thread:

    https://music-electronics-forum.com/showthread.php?t=49793&page=2

    Not that...
  27. The HAMEG looks plenty good enough for most any...

    The HAMEG looks plenty good enough for most any use. Price is very fair. Even better if you can pick it up in person, first so you can observe it working in person, second so you don't have to...
  28. I post this so often, oughta have it on "speed...

    I post this so often, oughta have it on "speed dial." Hear ye, hear ye, read ALL about it, here:

    The Dreaded Switching Jack Problem

    https://music-electronics-forum.com/showthread.php?t=28549
    ...
Results 1 to 28 of 500
Page 1 of 18 1 2 3 4