[R-390] R-390 alignment question

[Bob Camp]

Hi

Find the peak in the IF 

Move off of the peak to the specified attenuation (both sides of the peak, same delta frequency from peak)

Adjust the phasing capacitor as needed to balance the rejection on both sides of the peak

Bob
KB8TQ

On Jul 29, 2014, at 7:29 PM, Frank Hughes <fsh396ss at gmail.com> wrote:

> Hi,
> I am trying to do my first alignment on the "tailgate" R-390, so as to perk
> up the performance.
> 
> Using this manual:
> http://i180.photobucket.com/albums/x257/fish1_07/R-390/r390TMcover_zps1455706b.jpg
> 
> R-390A alignments in the past have been no issue, but the R-390 is a little
> different, and I am baffled by one procedure.
> 
> All was going well, peaking coils, watching the HP 410C meter increment a
> tiny bit more with every pass.
> 
> Then I hit paragraph "K".
> OK, I am old, and cognitive functions are more limited - most of my brain
> cells are dedicated for looking for my glasses.
> 
> Thus I would be MOST appreciative if anyone can explain in language I could
> understand what they are trying to tell me in paragraphs "K" - "N". I just
> don't get it.
> TEXT:
> http://i180.photobucket.com/albums/x257/fish1_07/R-390/r390text_zps4f6aeefc.jpg
> 
> TEST SETUP:
> http://i180.photobucket.com/albums/x257/fish1_07/R-390/r390_test_setup_zpsfeee93f8.jpg
> 
> THE DREADED Z501:
> http://i180.photobucket.com/albums/x257/fish1_07/R-390/Z501_zps5acd2b93.jpg
> 
> 73
> Frank
> KJ4OLL
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