Bogen Output transformer

youngpedals · 01-11-2009, 04:11 PM

Hello all,
I am building an Epi Valve Junior using transformers from a Bogen AP-35. I have a mystery output transformer and i'm hoping someone might have the wire color connections. The OPT is marked 83-336-000 and -606-4-46 below that. The primary has blue, brown, and red wires; the secondary has black, yellow, and green wires. I believe the AP-35 is a push-pull, so my guesses for the colors are:
blue/brown = plate
red = B+ (center tap)
black = ground/ bottom of OPT sec. winding
yellow = 16 OHM tap
green = 8 OHM tap

But these are only guesses and i'm hoping someone can verify or correct me.

Thanks,
Marcus

olive2sing · 01-17-2009, 02:51 PM

It looks like you're close. I'm looking at the schematic for a MX30A and the red is B+, blue and brown are the plates. Black is Gnd./com, yellow is 8ohm and green is 16ohm. hope this helps.

01-11-2009, 04:11 PM	#1
youngpedals Junior Member Join Date: Jan 2009 Posts: 1	Bogen Output transformer Hello all, I am building an Epi Valve Junior using transformers from a Bogen AP-35. I have a mystery output transformer and i'm hoping someone might have the wire color connections. The OPT is marked 83-336-000 and -606-4-46 below that. The primary has blue, brown, and red wires; the secondary has black, yellow, and green wires. I believe the AP-35 is a push-pull, so my guesses for the colors are: blue/brown = plate red = B+ (center tap) black = ground/ bottom of OPT sec. winding yellow = 16 OHM tap green = 8 OHM tap But these are only guesses and i'm hoping someone can verify or correct me. Thanks, Marcus

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01-17-2009, 02:51 PM	#2
olive2sing Junior Member Join Date: Oct 2008 Location: Poe Indiana Posts: 14	It looks like you're close. I'm looking at the schematic for a MX30A and the red is B+, blue and brown are the plates. Black is Gnd./com, yellow is 8ohm and green is 16ohm. hope this helps.

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