Re: [IRCA] Full SRF-59 Service Manual Alignment Performed

["Mike Westfall, Lost Almost NM" <mwdx@xxxxxxxxxx>]

If there are image and intermod problems, I suspect that the filter
replacement won't take care of that. Fortunately, where I live is off
the beaten path, radio station wise, so I haven't noticed such
problems. I will have to wait until I go to Santa Fe or Albuquerque
before I can assess the performance from within an RF hall of
horrors...



On Jan 3, 2008 10:11 PM,  <satya@xxxxxxxxxxxx> wrote:
> Hey Mike:
>
> One of the other things that Gary found in the 2007 Shootout was problems
> with images in his RF-rich environment. His were:
>      " Strong KSUH-1450 image on 550;  spurious mix of KSUH-1450 and
>      KZIZ-1560 heard on 1610"
> Are you able to tell if there is any improvement in that aspect of the
> M-37V's performance??
>
> 73 - Kevin
>
> > Today I decided to experiment more, and decided to put the narrower
> > SFR450K 6-element ceramic filter (I think it's 4kHz bandwidth) in and
> > see what happens.  Well...  It definately gives even more selectivity,
> > but the audio is now too low-toned for comfortable intelligibility,
> > especially when females are talking. The filter worked well in the ol'
> >  DX-440, but I could tune slightly away from center one way or the
> > other to restore higher frequency response while avoiding adjacent
> > channel splatter.  That's a trick the SRF-M37V just can't do, so
> > tomorrow, I guess I put the SFP450I 4-element 6 kHz filter back in and
> > be done with it.
> >
> > Now to find a service manual, so's I can tweak and peak the
> > performance, though I suspect it doesn't really need it. I think I saw
> > a website that claimed to have it available for download, as long I
> > gave 'em my financial details and $18. I'm not that much of a fan of
> > the radio yet.
>
>
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-- 
Mesa Mike
LA de NM
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