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23rd February 2011, 05:38 PM
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diyAudio Member
Join Date: Mar 2007
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ASL AQ 1002 PP KT88 problem with input stage
I'm lost trying to figure out where I'm loosing 60V on input/spliter anodes of 12AU7 triodes. Schematic attached . B+ on the stage to plate resistors is as it should 288V but center of 120k plate resistors is only at 101V potential with bias set up at -115 .Resistors measure as they should 120kohm. My friend simmed that circuit and voltages should be at the levels like notetd in the schematic. What the heck?!
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