Posted by
John-483 on
Apr 23, 2006; 2:21am
URL: http://elecraft.85.s1.nabble.com/Strange-receive-problem-tp389057p389064.html
I have the same problem on one of my 40M dipoles, hears good for a while
and then the signals go way down. One tap of the key and receive is
restored. I know the problem is at the remote coax switch, most likely some
corrosion at the coax connector. I've had the problem in the past with
another coax connector and agree that Vic's suggestion has merit. When I
always ran QRO in the past I never had the problem, don't know if the KW
kept it clean or what?. Since I've been total QRP for the past 5 years I've
seen this problem 3 times. I clean all the connectors and the problem
clears. Worth a shot?? RF does some strange things.
John
k7up
At 04:33 PM 22/04/06, you wrote:
>Joseph Reed wrote:
>
>>I have an issue on 30m receive only. When I transmit on 30m I get
>>full power, and it receives normal, but after a while it loses most
>>of its sensitivity. Transmit again and it will hear the other side
>>of the earth. I have noticed that once it goes partially deaf I can
>>get a High Curr indication on the first dash I send, but after that
>>it puts out full power with no complaints and of course after every
>>transmission it is that beautiful K2 receive.
>
>Check the 30m feed line, connectors, etc. Also test it into a dummy
>load. Although you might have some difficulty determining receive
>sensitivity, you'll notice if you get the Hi Curr indication. Maybe the
>problem isn't actually in the K2! Poor contact in coax connectors often
>looks like this.
>--
>73,
>Vic, K2VCO
>Fresno CA
>
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