Mig100b schem/xformer info

[blindsirens]

Scratching my head here. Only seem to be getting heater voltage for v3 and outputs. Why would sovtek put V1 and V2 on separate windings?

No voltage whatsoever on other windings,no B+ nothing. Unusual for a pwr tranny to have some windings run perfect and others completely dead? No fuses blowing,filter caps and rectifiers all check out.

Anyways,if this is the case I'm looking for a suitable replacement. These seem like a good layout to start with or maybe I'm just nuts. Anyone familiar with these and know of the quality of the xformers on these Migs?

[blindsirens]

Discovered 200vAC at standby switch. None of the caps or diodes show this. Stby is always after rectifier and caps as far I've experienced, so I'm wondering how this can be. There are purple and red leads running from the xformer straight to stby switch. Still looking for sovtek 100B schematic.

[bulldogguitars]

The free info society might have them, www.freeinfosociety.com

[clintronics]

http://www.clintronics.net/images/Sovtek%20Mig100%20schematic.jpg

[blindsirens]

Thanks. It is somewhat similar although on mine V1 & V2 share htr voltage and V3 shares with the outputs. The stdby fuse is wired different and like I said someone has the high voltage running straight from the xformer to the stdby switch which is snapped off. Its one of those amps where you would have to see it to believe it.

There is at least NINE leads from the pwr xformer disappearing into an intersection of wires off the power supply. I have no idea what they were doing and I'm going to have to completely disassemble this mess and map out how it currently is wired and attempt to rewire it. There's also a jumper below the pwr supply board I am not sure is post factory or not.

Did I mention the 16ohm jack is removed with the leads taped inside the amp?
I'm going to take my time and start with power supply. I'm praying the trannys are okay as everything else looks replaceable.

I wish I could get an internal pic from someone who has one of these. Although if anyone had a guitar Mig50 or 100 I would definitely benefit from seeing those insides.

Going to look for a sovtek forum or fan page.

[blindsirens]

You learn something new everyday. The Mig 60 is looking like the best info for this 100Bassov Blues amp. V1&V2 heaters are 12vdc and v3 shares with the output in the usual 6vac. And surprisingly they wired these secondary's straight to standby then to the rectifier section so most of the supply is already correct barring some jumpers someone put on the bottom of the pcb which may or may not be factory. I'm just going to follow the Mig60 schem.

[Enzo]

There are many amps where the standby switch cuts off the AC to the rectifiers. Some Marshalls come to mind.