[1000mp] inrad 1.8 filter experience

[n3drk]

Mike, are you referring to the mark V or mp?
john

----- Original Message -----
From: "Mike Schatzberg" <cherokeehillfarm at earthlink.net>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Friday, May 27, 2005 8:39 AM
Subject: Re: [1000mp] inrad 1.8 filter experience


> Hello Yaesu Fans:
>
> I removed the 1.8 khz third IF filter, after about 2 years, after
> experimenting with various Inrad combinations.  The 1.8 khz pair, provides
> the best QRM reduction, but the fatigue of listening was too high for
> everyday DXing.  I achieved the more comfortable sound of the 2.4 khz
pair,
> by using the 8 pole Collins 2.0 khz filter in the third IF.  If you use a
> slight counterclockwise rotation of the shift control with this
combination,
> you may not even realize that you have the narrow pair engaged, as the
> quality is that good.  I think your ear must get trained to listening to
the
> mechanical filter sound, as your 2.4 third IF is also a ten pole Collins
in
> the Mark V.
>
> The use of the DSP filters in the second IF, adds quite sharp skirts to
the
> analog filters, and can be superimposed over the various filter
> combinations.  When the band is quiet, and the QRM low, I especially like
> the use of no filter in the second IF, and the 6 khz ceramic filter in the
> third.  For additional selectivity, you then engaged the DSP into the
second
> IF.  These combinations give the lowest noise floor possible.
>
> All the above I use with the Inrad roofing filter.  You will generally
find
> that reducing the IF gain in menu 9-1 by two numbers from the factory
> setting, will give excellent results, and further reduce the noise floor
and
> improve the MDS level.  Please don't forget to use the RF gain control at
> all times, reducing the average setting to about 2 o'clock, for the lowest
> noise floor, and highest audio quality.
>
> I have found the above set up to work extremely well, and to provide the
> best QRM reduction when necessary, without fatigue.  Even working pileups
> for hours is not as tiring as it once was.
>
> Regards,
>
> Mike
> WB2AJI
> ----- Original Message -----
> From: "k8rs" <k8rs at arrl.net>
> To: <rick.moskovits at ns.sympatico.ca>; "All about Yaesu 1000mp"
> <1000mp at mailman.qth.net>
> Sent: Friday, May 27, 2005 7:55 AM
> Subject: Re: [1000mp] inrad 1.8 filter experience
>
>
> > Rick,
> >          The Inrad roofing filter I just installed in my 1000MP has made
> the
> > audio harsh and distorted on strong signals.  Look as if there is too
much
> > gain there and has to be reset.
> >          I am quite satisfied with the two SSB filters I have had for 5+
> > years.
> >                            K8RS
> >
> >
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