[Yaesu] Inrad Filter

[va3pl at cuic.ca]

Thanks Dean
That's the way to go as you describe it.
I feel that Inrad 701B 400Hz is a disappointed and only way to go is with
pair of 250 and replacement of Murata filter in second RX with 2.1 filter
(or whatever someone prefer).
Andy - VA3PL


----- Original Message ----- 
From: "Dean St. Hill" <vision2000 at acepaging.com>
To: "va3pl @ cuic.ca" <va3pl at cuic.ca>; "Yaesu" <Yaesu at mailman.qth.net>
Sent: Thursday, May 05, 2005 10:46 PM
Subject: Re: [Yaesu] Inrad Filter


> Hi Andy et al,
>
> Like you, I installed a 400hz filter for the 8.2MHz IF on my field. I
found
> that even though the same bandwidth filter seemed to have worked great on
a
> kenwood back in my dark days, it did not seem to be any significant
> improvement over the 500hz OEM.
>
> I subsequently bought a 250Hz 2nd IF and later a 250Hz 3rd IF and my
results
> have been a dramatic improvement!!!
>
> I think part of the problem is the larger number of stations that turn out
> for RTTY contests in relatively small sub-bands... forcing stations to
> increase their selectivity to the point where in RTTY contesting, 250hz
> filters seem the norm.
>
> Not having anything better to do with the 400Hz filter, I desoldered the
> 500Hz OEM and replaced it with the Inrad 400Hz -- again I'd say that on
CW,
> the results are probably worth it, but if I had to do it all over again,
I'd
> go straight to a pair of 250Hz filters.
>
> One other mod. I'd highly recommend is a change out of the 2nd Receiver's
> OEM SSB filter for either a 2.1 or 2.8Khz filter (450Hz 2nd IF filter) -- 
It
> involves some work, and of course involves both desoldering the original
> small murata filter and wiring in the replacement. The increase in
receiver
> selectivity is truly dramatic!!!!
>
> www.remeeus.nl/english/hamradio/ft1000subrxfiltering.htm  has info on that
> modification.
>
> Best Regards,
>
>
> Dean - 8P6SH / 8P2K
>
>
>
>
> ----- Original Message ----- 
> From: "va3pl @ cuic.ca" <va3pl at cuic.ca>
> To: "Yaesu" <Yaesu at mailman.qth.net>
> Sent: Thursday, May 05, 2005 3:53 PM
> Subject: [Yaesu] Inrad Filter
>
>
> >I have bought and install Inrad Crystal Filter #701B for mt MKV Field.
> > This is for second (8.2MHz) IF.
> > Thay advertize it as 400Hz.
> > I do not see any difference between stock 500Hz filter and Inrad 701B.
> > Is anybody actually measured it?
> > I was hoping for a bit better rejection for RTTY and CW but I am a bit
> > dissapointed.
> > Any opinionon 250Hz inrad filters for second and third IF?
> > 73 de Andy - VA3PL
> >
> >
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>