Has anyone hooked up or used one of these EMI TG 12345/R724/3 amp cards?

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well I got it working, it needs "B+" on the primary center tap to power the output stage, I don't have the docs for the transformer
wiring but the unit also uses +/- 20volts very strange design! there is also a 37 volt supply in the case from these but it seems to
me it was hooked up to one of the plus/minus rails all! very weird stuff all the other EMI use straight +/- 20.
 

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