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A friend and I are trying to bring a TL-922 back to life and obtain full power output. The amp is working with a new HV supply and new 3-500Z tubes but cannot achieve full output as specified. It seems to be putting out about half the power that it should. If anyone on this reflector has any clues as to where we should be looking for some component which may be failing or have failed and would cause the low output, please reply. We are driving the amp with 100W and are seeing CW outputs at about 600W, key down, and SSB outputs of about 800W peak.