[Amps] Amp Supply Power Dropping

[Michael Almeter]

Hello All,   I've got an interesting problem with my Amp Supply LK-500NTC. While operating a contest this weekend, I watched as periodically, the power would drop down to about 100 watts output (with about 50 watts going into the amp from the transmitter). I'd give the amp a second, and the power would go right back up to about 500 watts.    I initially thought this was overheating, so I turned the internal fan on full blast. This didn't seem to make that much of a difference. Every once in a while, the amplifier would not have any output. Between 50 and 90 watts going in, but nothing coming out. This makes me think there's a connection issue in the amp, but I haven't been able to find one - yet. While there was low output or no output, the plate and grid current on the amplifier remained within normal ranges.    Any one got any ideas?

73,

Mike 

W4MJAdiv>