[Elecraft] Low PowerOut Troubleshooting HInt?

[Scott McDonald]

I'd appreciate some thoughts on the following. Setting up for SS tonight, I measured K3 (SN474, all mods done) low power output all bands, CW and SSB, about 400 milliwatts before KPA3 kicks in, then increasing power to about 8 or 9 watts at 100 watt setting.  Tuner would function fine and tune at 5 watts, but post tune behaved the same way. Put the radio on the bench, and saw the same behavior, all bands. At the bench, before removing the cover, I administered one very firm diagnostic swat, and everything returned to normal and has behaved itself for about 30 minutes. Any chance that behavior is indicative of a particular connector/relay or other issue I should take a look at, as I can't replicate the problem now? Thanks for any thoughts. Scott ka9p