I just bought a 30L-1 at a local auction.

It puts out 500 watts on 3.5 MHz and 7.2 MHz

On 14.5 MHz it's 350 Watts.

On 21.2 and 28.25 MHz its 200 Watts.

Any thoughts on where to start trouble-shooting?

I'm thinking of checking the bias voltage and working from there.

I'm driving it with a Ten-Tec Omni -D with 100 watts output. The reflected power in the exciter is low, less than 1 watt.

I've ordered the power supply HV upgrade kit since the caps are old and this amp has sat for many years.

Thank you for your suggestions.