[1000mp] roofing filter and menu 9.1

[Mike Schatzberg]

Jim of course is right, and has experienced the same results that many
others have had.  The Inrad instructions were not correct for my radio, and
for many other radios which were all reported to have experienced an
impressive gain in signal with the installation of the two stage low noise
amplifier, which is part of the roofing filter mod.  The stated few DB gain
in the first IF stage is simply much more, perhaps as much as 8 DB!

The roofing filter mod appears to do everything that the earlier IF mod did
for the Mark V, plus restrict the bandpass in the first IF to 4 KHZ.

I can not explain why Inrad has stated their installation instructions as
they have, except perhaps there has been some change in the design since the
first filters with their associated amplifiers were delivered.

Whatever the reason, there certainly is no need for both mods, or switching
between the two mods, at least in my radio.  The new roofing filter mod does
it all.

73 and Happy DXing,

Mike
WB2AJI
----- Original Message ----- 
From: "Jim W7RY" <w7ry at centurytel.net>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Monday, January 24, 2005 11:27 AM
Subject: Re: [1000mp] roofing filter and menu 9.1


> No.
> I was not talking about the IF mod. This thread is about the roofing
> filter. As stated before. I lowered my 9-1 setting 13 to 10.
>
> My understanding is that the part of the IF modification was included in
> the roofing filter. Thus lowering 9-1 was required.
>
> 73
> Jim W7RY
>
>
> 73At 05:44 AM 1/24/2005, you wrote:
> >If you didn't have the previous INRAD mod installed, don't change the
> >setting. If you make any changes make sure you make a note what the
original
> >number was.
> >
> >If you are concerned about the S meter you could try reducing the 9-1
> >setting by one number. Or adjust for best signal to noise ratio as other
> >posters have suggested. I believe most of those posts were talking about
the
> >if mod, not the roofing filter.
> >
> >73, Tom, W1TO
> >
> >----- Original Message -----
> >From: "Kostas SV1DPI" <sv1dpi at raag.org>
> >To: <1000mp at mailman.qth.net>
> >Sent: Sunday, January 23, 2005 4:27 PM
> >Subject: [1000mp] roofong filter and menu 9.1
> >
> >
> > > I added the roofing filter in my MARK V.
> > >     Does it need to decrease this value?
> > >     I read in inrad manual that i need to increase if i had IF mode =
> > >     installed (i didn't).
> > >     I had the impression reading the emails here that i must decrease
it.
> > >     I noticed that s-meter is wrong now (without decreasing the 9.1
menu)
> > >     Confused.....
> > >     Kostas SV1DPI
> > >
> > >
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