[Amps] Alpha 76a

[Colin Lamb]

"One thing you might consider if you haven't already is replacing the power supply HV filter caps.  They are more than ready One thing you might consider if you haven't already is replacing the power supply HV filter caps."

Two weeks ago, I had my Alpha 76A apart and decided to check out the electrolytics and bleeder resistors.  I removed each capacitor and checked them with a capacitance meter and and ESR meter.  I also measured the leakage current under load.  The amp had not been used for years, but after forming for a few minutes, the leakage current dropped to almost nothing.  Measured capacitance was within a couple percent.  

These caps are high quality original caps and did not need replacement.  Although I have found other amps that needed replacement caps, the Alphas have held up well.  Worthwhile to try them before replacement.

73,  Colin  K7FM