Marc - I just rebuilt the L-7PS with a Harbach board (and a L-4PS with the Heathkit Shop board)....Both boards show 2700 volts on the amp meters after putting them into operation.
Did you do a low-voltage test before installing? I applied a 20VAC voltage to the input and got ~50VDC at the outputs verifying the voltage doubler function. You may want to give that a try....sounds like a part reversal during install. Dino KL0S On Feb202012, at 1050 AM, hs0zju wrote: > I recently aquired a l4b. I upgraded the ps and soft key with harbach. I > turned the amp on in ssb with no load and have 2400 volts. I did not try and > key or do anything else as i do not want to cause damage. I believe i should > have 2600volts. > > 73 marc hs0zju
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