I'm getting K3 PL1 Error and no transmitter output. After cooling a bit, PL1 voltage measures 5.9 volts. I get intermittent output when I send a string of dits with PL1 voltage showing 5.9 volts when a dit gets transmitted and 0.0 volts when a dit doesn't get transmitted. Help please. Any suggestions? 73, Hank, W6SX