[Elecraft] K3 receiver gain problem

[Dick Dievendorff]

I had these symptoms (with another radio) and eventually tracked it  
down to a corroded junction where a saddle clamp joined parts of the  
linear loading wire on my short 40m beam.

Dick, K6KR


Sent from my iPhone

On Mar 27, 2010, at 10:44 AM, Vic K2VCO <vic at rakefet.com> wrote:

> On 3/27/2010 9:02 AM, Ron W3ZV wrote:
>> I am playing in the contest today. I have had two instances where my
>> receiver gain has gone down dramatically. It sounds like I have  
>> switched
>> to the second antenna with nothing attached. Engaging PTT brings it
>> back. I installed the second receiver and DVR a week ago. Has been
>> working fine until today. The problem is not reproducible. Happens on
>> its own schedule.
>
> Often this kind of problem is caused by an intermittent poor  
> connection somewhere in the
> antenna system, a dirty relay contact if you have any relays in the  
> path, etc. As soon as
> you hit it with a bit of RF, it cleans up and works for a while. But  
> in receive, the
> voltage is so low that it stays in high-resistance mode.
>
> Check the coax connectors, relays if any, etc.
>
> I had the exact symptom about a year ago when I had a balun with a  
> corroded solder connection.
> -- 
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco/
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