Thanks Don, K3FPR, for the troubleshooting info.  I isolated the problem to the 
VCO part of the RF board.  When I replaced T5 with the VCOSHLDKT a couple of 
years ago, I did not tin the T5 toroid wires very well. The K2 quit a few days 
ago.  I removed the toroid, retinned the wires, resoldered the toroid to the RF 
board and the K2 came back to life.  The PTTL phenomenon is for real.  Roy 
Morris  W4WFB
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