Wonder if anyone has seen the following problem. Nothing that is keeping me off the air. K3 is SN in the 1500 range. It is fairly bare bones with just the IF OUT/RX ANT strip installed. Also 100 watt module. On 6 M I use a 20 DB preamp that is powered from and external power source the the RX ANT IN/OUT connects the preamp. When adjust the transmitter power out, when I reach the point where the power meter scale changes from 0-100 watts to 1-10 watts the receiver gain drops by 20 db, the amount of the preamp. It appears that the RX ant has been switched back to normal antenna input. It becomes good again as I increase the output power to the point where the scale changes back to 0-100 W. Weird indeed. Normally I run above 10 watts on 6 M so no problem but this should not happen. Elecraft techs suggest reseating the front panel. I have another K3 , later serial number that does something similar but in reverse. When I cross the transmitter power scale change from 0-100 to 1-10 there is a very minor increase in the receiver gain. I can see it on the P3 and just hear it in the speaker. This amount not a problem to me but apparently something happens in the receiver circuit on 6 M when the power scale switches over. Other bands appear okay. I know there was some kind of firmware patch way back to correct for transmitter power jumping from around 8 to 13 watts or something like that. Don’t remember the exact numbers. Before I pull the front panel any suggestions. 73 Mike K4PI ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net
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