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  1. Replies
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    What I didn't get from the start is, why doesn't...

    What I didn't get from the start is, why doesn't he just turn it down? I can't see that it would be much different than adding a MV (to a Twin, anyway).
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    Also note: This unit has an "adaptor" function...

    Also note: This unit has an "adaptor" function which is a pre-amp/power amp loop. If you don't have anything in the loop jacks in the rear, you must have the adaptor button set appropriately on the...
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    Can you hear the speaker relay engage? Measuring...

    Can you hear the speaker relay engage? Measuring the voltage across D22 (relay coil) would tell you if it's supposed to be engaging or is in protect. There won't be DC (or anything else) on the jacks...
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    Hard to say without seeing a schematic of the...

    Hard to say without seeing a schematic of the circuit or even knowing what amp we're talking about.
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    I'm not positive what those traces are for, but I...

    I'm not positive what those traces are for, but I see a brown and blue wire nearby. Maybe OT leads? If so, they will have B+ on them. A little Corona Dope wouldn't hurt. That said, if you clean the...
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    Have you tried a factory reset? It could just be...

    Have you tried a factory reset? It could just be corrupt settings.
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    ^^^^^^Yes, that. Another possiblility is that...

    ^^^^^^Yes, that. Another possiblility is that side of the amp wasn't biased properly after the repairs were made and substitute transistors were installed. There are lots of "techs" out there that...
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    I usually just scrape/cut it away with an x-acto...

    I usually just scrape/cut it away with an x-acto knife if it's not too bad. Sometimes it requires a dremel tool. Get it down to where you no longer see charring.
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    Do grind out any of the charred circuit board...

    Do grind out any of the charred circuit board before adding the jumpers. Once burnt that circuit board can become conductive.
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    Welcome to the place! Is the farting sound...

    Welcome to the place!

    Is the farting sound with audio, or random farting even with nothing plugged into the amp? If you suspect it's heat related, get some freeze spray and see if you can narrow...
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    Have you checked the speakers? If the power amp...

    Have you checked the speakers? If the power amp failed and output DC voltage to the speakers, it's possible the speakers burned open.
  12. Did these problems exist before work was done on...

    Did these problems exist before work was done on the amp? I'm always suspect of mods being done improperly. My first step would be to double check that work. I'm assuming the mod is the one described...
  13. Actually the Celestion logo just means it has a...

    Actually the Celestion logo just means it has a Celestion speaker. The brand is Monoprice. They have been all over eBay for quite some time.
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    The volume pedal grounds the signal when it's...

    The volume pedal grounds the signal when it's down all the way. Since you're just using Y's, it will ground both dry and wet. Do you have another pedal you could use as a buffer- maybe EQ pedal or...
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    I recently had some SMD work to do and saw this...

    I recently had some SMD work to do and saw this on eBay (link below). I ordered one- figured it was worth the risk. The thing is cheap enough you can make up for the cost on a job or two. Well, I...
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    Who knew? :surprised:

    Who knew? :surprised:
  17. Well, you may want to contact them first to see...

    Well, you may want to contact them first to see if they have it in stock. It could be just another rabbit hole. If they have to order it from Peavey, you're back where you started.
  18. That's great if possible. However, I deal with...

    That's great if possible. However, I deal with several stores. Many of them use repairs to get some extra traffic. They want the guys with broken gear to come into the music store. I get that, and...
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    Here's the schematic. ...

    Here's the schematic.

    https://www.hobby-hour.com/electronics/s/schematics/boss-hm2-heavy-metal-schematic.png

    Insert a signal and trace it through with a scope and see where it gets "lost". If...
  20. Agree with the above. I've had a few with this...

    Agree with the above. I've had a few with this exact symptom. All were found to have at least one bad filter cap.
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    If you've got a DVM, why not just check the solid...

    If you've got a DVM, why not just check the solid state parts and see if they need replacing?
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    dmeek has it. Double the fuse rating.

    dmeek has it. Double the fuse rating.
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    I was guessing it's a pentode/triode switch.

    I was guessing it's a pentode/triode switch.
  24. The Stew Mack part will actually file the frets....

    The Stew Mack part will actually file the frets. The Amplified Parts piece is only for finding uneven frets. It doesn't have the diamond sanding part. All this, at least, as far as I can tell.
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    What you describe seems reasonable. Does it have...

    What you describe seems reasonable. Does it have a single connector on the secondary that you can just temporarily unplug (like this one...
  26. I'm thinkin' maybe the diamond coated abrasive...

    I'm thinkin' maybe the diamond coated abrasive sides have something to do with the price.
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    Awesome job, Randall! I'd love to hear it, too....

    Awesome job, Randall! I'd love to hear it, too. :thumbsup:
  28. Oh, that's a handy tool! :thumbsup:

    Oh, that's a handy tool! :thumbsup:
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