This is a description of Preamp Power Supply

Since each supply provides power for each box these rails are subdivided into eight (8) outputs supplying approximately the same power level. Output ratings are as follows A 12V 20A. B 12V 20A. C 8V 20A. D 8V 20A. E 8V 20A. F 8V 20A. G -6V 25A. H -6V 25A As seen in the illustration +12(A,B) and –6 (G,H) provide power for two columns while +8 ... ................
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