Power Forum

RE: New PPP... tolerances?

75.87.178.214

In Reply to: RE: New PPP... tolerances? posted by PaulMC on May 07, 2009 at 17:10:17

I have a tube pre, cd player and 70 watt stereo tube amp plugged into the PPP. Prior I had a P-300 running the amp and a P-300 running the front end with no problems so I thought a PPP should work.

Came home tonight and checked readings before turning anything on. It read ~118-119 input adding 3 volts to output 122. THD input ~2.5%, output ~0.4%. Turned everything on to warmup and nothing changed. Came back about 20 minutes later, unmuted the preamp and turned volume up to listening level (with nothing playing) and saw the THD output jump to ~1.2%. Turning the amp off reduces it back to .4 THD. Turning amp back on it immediately jumps back to low to mid 1%.

Is 1.2-1.5% too high and is that abnormal?

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