[Collins] 75A-2 info

[Gerald]

On Mon, 2005-07-04 at 17:30 -0700, telegrapher at att.net wrote:
> Does the Collins Compendium that's available cover 75A-2 mods as well? 
> This A-2 is not performing like it's supposed to.  I stripped out the 
> product detector mod that was haywired it and replaced all the caps in 
> the Audio and IF section.  Sure looks better.  Now if it would only work 
> like it should.
> 
> Someone please bring me my medicine!
> 
> larry
> W0OGH
Well, now you can check the rest of the paper capacitors or simply
replace them. Low screen voltage on multiple stages is hard on receiver
performance. 

Next you can check all the carbon composition resistors for those that
have drifted (from heat, humidity, and age) out of tolerance. There
could easily be several out of tolerance today.

Of course, tubes do age and contribute much to poor performance.

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer