Re: [IRCA] SRF-59 Alignment Procedure

[Bill Harms <philcobill@xxxxxxxxxxx>]

What is the IF? 455 kHz? Can it be peaked as well?

D1028Gary@xxxxxxx wrote:
> Hello All,
> 
> Congratulations to the east coast DXers John  and Paul on their
> SRF-59 DX loggings-- I'm always happy to hear of Ultralight DX  fun!
> 
> Recently I have had several requests to develop  (and thereafter 
> promulgate) an alignment procedure for the SRF-59.  This  has been
> done, and it was successfully performed on a unit whose sensitivity
> was  slightly off from my 3-TP original SRF-59 unit, making both
> equal in  sensitivity.  That is the good news...
> 
> The not-so-good news is that this alignment  procedure requires 
> patience, good eyesight, steady nerves, and involves a rather  tricky
> alignment of the dial needle frequency with the tuner frequency,
> which  may require trial-and -error attempts at bind-free dial
> movement.
> 
> The RF alignment itself is very simple, involving  only the peaking
> of a single IF transformer near the 1.75 inch ferrite bar  antenna,
> which has a significant effect on AM sensitivity.  A  non-metallic
> flat-bladed alignment tool (plastic or homemade wood) is required  to
> peak the slug.  This alignment procedure should only be attempted if
> you  have certain proof that the AM sensitivity of your unit is less
> than another  SRF-59, and then, only if you have some serious
> experience with disassembly and  reassembly of tight-fitting, 
> miniature electronic equipment.  Professional  technicians, hobbyists
> with extensive Heathkit experience, and watch repairmen  (hi) should
> have no trouble.  The file will be provided to any who request  it,
> and feel free to proceed at your own risk (after all, it's only 15
> bucks,  right?).
> 
  73 and Good DX,
> 
> Gary
> 
-- 
Bill Harms
Elkridge, Maryland

Check out the Spokane Radio History Pages
http://spokaneradio.philcobill.com

and the Spokane Radio Tower Pages
http://spokanetowers.philcobill.com
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