[R-390] Below 8mhz problem

[Scott, Barry (Clyde B)]

You guys who do these modifications just kill me.  If the engineers had wanted a good, clean ground at that point, they would not have gone to the trouble of having it varnished/MFP-ed underneath it!
.
.
.
<grin>

Congratulations on the find.  Makes you wonder if it was hard of hearing from the factory and never fixed.

Barry - N4BUQ

>  Hello to the list,
>  
>  Success!!  It was in the 1st oscillator circuit where I 
>  found the problem,
>  but the fix I did not expect.
>  
>  I had originally checked and reworked all the grounds in the 
>  RF deck......I
>  thought.
>  
>  Below T207, surrounded by components, is another ground 
>  point that also
>  anchors T207 to the deck.  The deck is coated with a shellac 
>  of some sort,
>  and I found the ground sitting on the shellac, finger tight. 
>   I removed the
>  shellac and tightened the ground, and the radio sprang to life.
>  
>  Very strong cal signal above and below 8mhz.  Also, the 
>  variable IF is
>  hearing just fine now.
>  
>  It goes to show that all those trees in the forrest can get 
>  in the way of a
>  simple fix.
>  
>  Thanks to all who offered their time and expertese in 
>  assisting me with this
>  fix.  I also know that those who may have expertese in other 
>  areas would
>  have assisted if it was needed.
>  
>  Thanks again.
>  
>  Regards,
>  
>  Jim Temple
>  73, KF4ICZ

<snip>