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  1. Replies
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    Your schematic link in post #1 is dead, at least...

    Your schematic link in post #1 is dead, at least for me.
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    Juan, As I said in post #3, I've gotten those...

    Juan,

    As I said in post #3, I've gotten those lamps from Loud in the past. They only recently sold Ampeg. Now, maybe they sold their parts stock, too. But, maybe not. It's certainly worth a phone...
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    I like that story as a lesson to logically...

    I like that story as a lesson to logically troubleshoot. There are those who would have first installed a new power transformer.
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    :spin::spin: Just call Loud. ...

    :spin::spin:

    Just call Loud.

    https://loudaudio.com/contact/
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    They have 36V cars in Canada? ;)

    They have 36V cars in Canada? ;)
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    My best advice is to get a set of probe...

    My best advice is to get a set of probe extensions so that you can test with minimal disassembly. I have a set and they are invaluable.

    54730
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    Across the pond? Loud is a US company and your...

    Across the pond? Loud is a US company and your profile says Indiana? :confused:
    Last time I called Loud for these, I think it took less than a week and they were around 2 bucks a piece.
  8. Just about any old piece of wire will work...

    Just about any old piece of wire will work (within reason). That circuit won't draw much current. Generally, on an active guitar, which this basically is, the battery ground will go to a stereo input...
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    Have you tried contacting Loud directly? ...

    Have you tried contacting Loud directly?

    https://loudaudio.com/contact/
  10. If the volume pot for channel B was open, you had...

    If the volume pot for channel B was open, you had no attenuation at all.
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    I wouldn't think so, but anything is possible....

    I wouldn't think so, but anything is possible. You could test it with a hair dryer if you like- PTC, so resistance should increase with temperature. Does it locate near the heat sink as I conjectured?
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    Thermistor is the yellow device marked PTC on the...

    Thermistor is the yellow device marked PTC on the circuit board.
  13. Replies
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    424

    I see thermal paste on the bridge rectifier, so...

    I see thermal paste on the bridge rectifier, so it must mount to a heat sink. I'm guessing the thermistor butts up against that heat sink when the thing is put together.
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    Those Samxon caps aren't the best quality (mildly...

    Those Samxon caps aren't the best quality (mildly put). It wouldn't surprise me if one was leaky.
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    You generally want the laminations perpendicular...

    You generally want the laminations perpendicular and not parallel- and transformers as far apart as possible, within reason. It's not a bad idea to think about weight balance when you carry the thing...
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    I wouldn't think a charger would get that hot...

    I wouldn't think a charger would get that hot with no load/battery. Have you looked at the guts? There can't be that much to a simple charger.
  17. Schematic is here: ...

    Schematic is here:

    https://music-electronics-forum.com/attachment.php?attachmentid=4259&d=1232848572

    Crate isn't out of business to my knowledge. Try contacting Loud.
    ...
  18. Why the second thread. Aren't we already doing...

    Why the second thread. Aren't we already doing this somewhere else?
  19. You damnnnnnnn right. ;)

    You damnnnnnnn right. ;)
  20. Check plate voltages and/or plate resistors on...

    Check plate voltages and/or plate resistors on preamp tubes. I find they commonly go towards open on these amps.
  21. Replies
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    I've used JJ's and nothings come back.

    I've used JJ's and nothings come back.
  22. Juan, If you look at the link I posted, it is...

    Juan,

    If you look at the link I posted, it is a ribbed cloth surround not a polyurethane foam surround for woofers. I've used these surrounds to fix plenty of guitar speakers. I do agree. You...
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    The "Ride" guitars have a bit of an old Rolling...

    The "Ride" guitars have a bit of an old Rolling Stones vibe, IMO. Good stuff, T!
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    ...... or a REASONABLE bass speaker.

    ...... or a REASONABLE bass speaker.
  25. If it were me, I'd just remove and replace the...

    If it were me, I'd just remove and replace the surrounds all together. You can get 'em cheap on eBay. This is an example (below). You'll have to measure to see if it'll work for your speakers. If not...
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    'Tis a silly speaker indeed. 2 ohm if you...

    'Tis a silly speaker indeed. 2 ohm if you parallel the voice coils. Resonant frequency an idiotic 26Hz. The unimpressive 86dB sensitivity is telling. The gap must be 3/4"+ to accommodate 2 voice...
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    Doesn't sound good and yes they can fail open,...

    Doesn't sound good and yes they can fail open, although not all that common.
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    I haven't used those Solid State Inc. transistors...

    I haven't used those Solid State Inc. transistors before, but it seems like a legit company. Maybe someone else has experience with them. If not, I'd say give it a go.
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