SIMPLE TRANSFORMER PROBLEM

[michael_krell]

ok i appreciate your help, thanks

[R.G.]

Yep, that one is toast. It's the most deadly form of fault - a short from primary to secondary.

I personally would either toss it in the dumpster or donate it to a rewinder, and get another ordered.

[puretube]

BTW: this is exactly a case,
why the yellow/green "earth" (=safety)-wire from a 3-prong mains cable
must be connected directly and firmly to the amp`s (or effect`s) chassis!!!

BTW: this was not directed neccessarily at you, Michael!

I just wanted to note it,
since I recently found an "anti-hum/groundloop remedy advice"
by *putting a resistor between chassis and the green/yellow earth wire* in an other forum - something I don`t really can approve...

[birt]

sorry i didn't read the second page :oops:

i think it's problem 3 in RG's list.

i've had the same thing and you won't find it with a DMM unless you have blown so many fuses and you have searched very long connecting and disconnecting wires until it gets that bad that you CAN find it with a DMM. (that's how i found out.)

this is a pain in the ass. i even found out wich winding it was on mine.

[michael_krell]

OK, confirmed. It is definetly broken. Do you know of a good replacement besides whats on fliptops.com?   theres a replacement transformer for 150 that is pretty much an exact replacement. but is that what i really want? something that will break again? i dont know, maybe it was badly taken care of or something. If you guys know of a more inexpensive solution please let me know.  other wise ill just order the one from fliptops for 150. I also need to get a new faceplate fromthem and those are rather expensive to running at 50 bucks.

[zachary vex]

hey R.G., the very first thing you said to do was:

account for all of the wires into/out of your transformer; which hooks to what, by actual ohmmeter readings?

and the very first thing i said to do was:

disconnect that transformer from everthing in the circuit and measure all the resistances between wires and create a drawing showing the most likely relationship between all of them.

look, it's simple... we learned the hard way, years ago.  why ask if you aren't willing to listen?  8^P  

an aside:  i NEVER EVER work on big guitar amps anymore.  ever.  i leave that to professional people with whom i have no strong personal ties.  honestly, they're suicide machines.  repairing a powered guitar amp is as safe as fixing a running garbage disposal.  with your face.