[R-390] Low sensitivity on 7-8 Mhz band

n4buq at knology.net n4buq at knology.net
Wed Apr 19 09:24:54 EDT 2006


I think that was Mr. Chuck Rippel.

http://www.r390a.com/Commonfail.htm#I%20was%20finishing

Third link down the list.

Barry - N4BUQ

> I am not sure anyone has mentioned this yet (although I may have missed 
the  
> post).  
>  
> Years ago, someone on the list gave me a tip to check out C 327, a 100pF  
cap 
> on the primary of T 207.
>  
> Replacing it on 3 different radios so far has solved 90% of the poor  
> performance up to 8mHz.  Admittedly on one of the radios I had to 
replace  some other 
> components related to the 1st crystal oscillator (V207), to finally  fix 
it.  
> The problem was clearly, in each case, related to poor output of  this 
> oscillator.
>  
> I used a high voltage NPO cap for the replacement each time.
>  
> Hope this helps, and good listening!
>  
> Harry  KG5LO
> Saline, MI
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