software

i just typed all this out on a different message board, so i'll just copy/paste what i typed.

before that you'll need some reference: over the summer one of the output jacks on my amp (sovtek mig-50) was broken (i bumped it against something while i had a cable plugged in and it was bent because of it). since i had a non-working sovtek big muff, i figured i'd just take a jack out of it and put it in my amp. i did that with some success (the amp worked)-some metal ribboning that was on the board came off, but everything still worked.

now comes about twenty minutes ago (copy/paste time):

i found my big muff guts, and noticed that a wire had come loose from the switch. i figured that that was the reason it didn't work last time i tried it. therefore i figured i'd just take the jack i put in my amp out and back into the big muff. well, i did that, then noticed that my amp didn't work without that jack. i took it apart again and took a look, and noticed that the jack connected a path for some wires (there was some metal ribbon on the circuit board). for one thing, some of the metal ribbon had already come offwhich is obviously not good. however, since i'm apparently an innovative genius when it comes to amp repair, i figure that i just need to connect those paths with some wire. i connect the first one without problem, but the ribbon had come off of the second one, so i just decide to turn the amp on anyway. right as i do that, i hear a sizzle/popping sound and watch a few resistors light up. what the **** i was thinking i'll never know. all i know now is that i have one ruined amplifier, and no money to fix it. i really hope that when i do get the money to fix it, it won't cost very much. hopefully it'll just need replacement resistors and a new jack.
Ouch........

If it's only the resistors it won't cost more than 10 Bucks...

yeah, that's what i'm hoping for. i'm actually not too terribly upset about it, because it should be an easy fix (though i'm not going to attempt fixing it myself).

it really looks like the blown resistors have something to do with the fuses, so i'm hoping they're just there as a precautionary measure (which may have ended up saving my amp). then again, i know nothing about amps (obviously).

hi,

you need to check if nothing else is broken. if it's only the resistor you have to find the original values and can replace it then (or let some replace it). If there's a mosfet in the amp (I don't know if it's SS, tube or mixed) it might be harder to replace: the mosfets might be relabled and could be more expensive.

A friend of mine ruined one output channel of his Flextone. The Line6 head has a left and right output channel. Both were connected to a stereo 4x12 cab. Nothing wrong here. But the box was set to mono, so both signals were mixed and the right power mosfets and some resistors blew. Looked really bad - so you're definitely not alone...

Mig-50s are all tube man - i'd be looking at your transformers.. KB is right - if it's only the resistors, it'll be a totally minor thing..

i'd have thought it would have taken something more major to hurt either transformer, but make sure these are the first things you check are ok hehe

tom


Originally Posted by mig50i just typed all this out on a different message board, so i'll just copy/paste what i typed.

before that you'll need some reference: over the summer one of the output jacks on my amp (sovtek mig-50) was broken (i bumped it against something while i had a cable plugged in and it was bent because of it). since i had a non-working sovtek big muff, i figured i'd just take a jack out of it and put it in my amp. i did that with some success (the amp worked)-some metal ribboning that was on the board came off, but everything still worked.

now comes about twenty minutes ago (copy/paste time):

i found my big muff guts, and noticed that a wire had come loose from the switch. i figured that that was the reason it didn't work last time i tried it. therefore i figured i'd just take the jack i put in my amp out and back into the big muff. well, i did that, then noticed that my amp didn't work without that jack. i took it apart again and took a look, and noticed that the jack connected a path for some wires (there was some metal ribbon on the circuit board). for one thing, some of the metal ribbon had already come offwhich is obviously not good. however, since i'm apparently an innovative genius when it comes to amp repair, i figure that i just need to connect those paths with some wire. i connect the first one without problem, but the ribbon had come off of the second one, so i just decide to turn the amp on anyway. right as i do that, i hear a sizzle/popping sound and watch a few resistors light up. what the **** i was thinking i'll never know. all i know now is that i have one ruined amplifier, and no money to fix it. i really hope that when i do get the money to fix it, it won't cost very much. hopefully it'll just need replacement resistors and a new jack.

Looking at your pic ... I would take it to a amp tech. You have a bad short somewhere causing these resistors to fry.


Originally Posted by ImpMig-50s are all tube man - i'd be looking at your transformers.. KB is right - if it's only the resistors, it'll be a totally minor thing..

i'd have thought it would have taken something more major to hurt either transformer, but make sure these are the first things you check are ok hehe

tom

what exactly should i look for when checking the transformers?

there is an underlying problem. simply replacing them will cause them to blow again. it looks to be a multiple-watt resistor, which means you probably have a short sending a few amperes through it, as pepi suggested.

I guess you gotta change your name now...

I case you think in fix it yourself I recomend you get the book quot;How to service you rown tube ampquot; by Tom Michell. It an amazig book that goes on detail on every part of a circuit desing. If you have no idea about amplifiers don't even think in touching it, there are many relation between componets in amp. What you think it's a resistor could be a capacitor or the output transformer.


Originally Posted by BreoganI case you think in fix it yourself I recomend you get the book quot;How to service you rown tube ampquot; by Tom Michell. It an amazig book that goes on detail on every part of a circuit desing. If you have no idea about amplifiers don't even think in touching it, there are many relation between componets in amp. What you think it's a resistor could be a capacitor or the output transformer.um..that's the problem. i tried to work on it when i really have no clue what i was doing, and obviously that didn't work out too well.

instead of just giving it to a tech to fix it, i think i'm going to try to just talk to a tech about my problem because it seems that there is an easy way i could fix it myself. hopefully i can have a tech check it out and tell me what's blown and what isn't, and then tell me if my idea will work.

If the problem has an easy solution probably it'll be cheap aswell... If the solution it's complicated you won't be able to fix it... And finally, if you think the solution it's easy, and you are completely misleading the problem and you try to fix it yourself, then even a repairman won't be able to solve it.

The best thing it's to save money and take it to a qualified repairman... It'll be cheaper anyway.