[Swan] Sensitivity and meter on 500

[Steve Sutfin]

Hi Jeff,
  This is in case my response didn't get thru the 1st time.
Both the 12BE6 2nd IF and the C202 CanCap have an effect on the S- 
Meter AND the AGC system which could result in low receiver  
sensitivity. I can see that happening with the 12BE6 after warm up.  
Something to look into.
73,
Steve k7dna

On Jul 3, 2017, at 7:11 AM, Jeff wrote:

> Hi all -
>
> Seeking some advice on a 500.  This seems temperature related, and  
> I'm having a hard time tracking it down.  I picked up a basket  
> case, and have been slowly rebuilding it.  I have it transmitting  
> and receiving OK now, but only when it's cold.
>
> From a cold start, the s-meter and receive function works as  
> expected, with good meter swings on signal peaks.  However, as the  
> rig heats up, the s-meter deflects less and less until it basically  
> remains stationary.  I also begin to lose receive sensitivity.   
> Compressed air blown at spots underneath the chassis doesn't seem t  
> have any effect, nor does air applied to the air variables.  It  
> just... dies out.
>
> Short of just starting to shotgun everything, does anyone have any  
> suggestions on where to start looking?
>
> Thanks...
>
> Jeff
>
> WB3JIH
>
>
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