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Old 30th January 2005, 08:35 PM   #1
diyAudio Member
Join Date: Jan 2005
Location: Boston, MA
Default MFA Luminescence--need schematic

I am looking for a schematic for the MFA Luminescence, specifically, an earlier design than the one that is best known. I sorry, but I forget the model designation codes. I don't need the audio circuit schematic--just the one that depicts how the transformers are connected.

The best known Luminescence (as far as I know) is the one with dual power supply regulators. Mine has only one regulator, and two odd size filament transformers.

My particular question that I'm researching is the wiring of these filament transformers. Both (and the B+ supply transformer) seem to have dual primaries, and all have a brown wire that is connected to the other brown wires, separate from neutral. This separate lug seems to be 1.4 ohms off neutral.

Thanks. If you can explain this or have such a diagram, I'll contact you off list.
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Old 31st January 2005, 12:49 AM   #2
KBK is offline KBK  Canada
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Join Date: Dec 2003
Location: The Wilds Of Canada
I have some email communiaton from a guy who has three of them. he was selling one on ebay or audiogon, I forget. Anyway, we had a few discussions about the designs, etc. I believe he has schematics. If I remember! always the trick!.. I'll dig up these fairly recent emails at workand maybe put the gentleman in contact with you.

That is, if you have no luck or joy, here on the forum.
"Extraordinary claims require extraordinary evidence." - Carl Sagan. Sometimes the claims aren't extraordinary. Sometimes the weakness of men's minds are the culprit. Mass mentality has nothing to do with obviousness or truths.
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Old 31st January 2005, 06:42 AM   #3
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Location: Boston, MA
Thanks very much.
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