[Elecraft] Hot KPA100 Resistor

[Roy Morris]

I have noticed that the R13, 100 ohm, 3 watt resistor that is mounted longitudinally in front of the fan gets right hot.  Maybe this is why it is placed in front of the fan.  I can't keep my finger on it for any length of time when the amp has been on for a period of time in sideband or cw service.  The K2/100-1 LCD readout shows 13.1 volts @ 480 ma in receive mode with the amp in the circuit.  The readout shows 13.1 volts @ 680 to 700 ma with PTT engaged in SSB (no modulation).  ALL options have been installed in this K2.  If 200 ma flows through this resistor, I calculate this resistor is consuming 2.62 watts or more which means it is operating near its power rating.  I just wanted to pass along this observation.   Roy Morris  W4WFB  
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