[1000mp] roofing filter and menu 9.1

[Mike Schatzberg]

Hello Bob:

Use your ears to tell you what the best signal to noise ratio is....tune a
S0 SSB station, and adjust the menu 9-1 to give the best readability, with
the preamp on (meaning the IPO lamp is not lit, say on 20 meters.

Adjust the menu downward from the factory setting 2, 3, or 4 numbers, and
pick the one which makes the weak signal easiest to copy.

If you pick three numbers down, your S meter calibration will be more or
less the same as before the mod.  If you pick two numbers down, signals will
read a little higher on the meter than before, and if you pick 4 numbers
down, signals will read a little lower on the meter than before the mod.

Of course, you can then go back a perform an S meter calibration after you
change the IF gain setting if you want to achieve 50 microvolts equal to S9
on the meter, with the tuned preamp on.

It is really not important that the meter be precise.  What is important is
to be able to copy the weakest signals against the noise floor of the radio.

73 and Happy DXing,

Mike
WB2AJI
----- Original Message ----- 
From: "Bob Main" <bobmain1 at alltel.net>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Sunday, January 23, 2005 8:32 PM
Subject: Re: [1000mp] roofing filter and menu 9.1


> OK now to find something that will give me 50uV so that when I get the mod
I
> will be able to set it up properly.  Luckily between the delay in them
> sending the mod and when I will be able to order it will give me plenty of
> time, at least 3 or 4 months.
>
> Thanks,
> Bob
> KB4CL
>
> ----- Original Message ----- 
> From: "Mike Schatzberg" <cherokeehillfarm at earthlink.net>
> To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
> Sent: Sunday, January 23, 2005 4:28 PM
> Subject: Re: [1000mp] roofing filter and menu 9.1
>
>
> > Hello Bob:
> >
> > On my Mark V, a reduction of 3 numbers in menu 9-1 brought parity to the
S
> > meter, after checking the meter on 10 meters, with the tuned preamp on.
> >
> > I used a signal of 50 microvolts, which gave a reading of S9 before the
> > mod,
> > and about 15 DB over S9 following the mod.
> >
> > In the end, I decided upon a reduction of 2 numbers only, which seemed
to
> > produce the best signal to noise ratio, and enabled me to hear the very
> > weakest S0 stations best.
> >
> > Today I regularly work S0 stations with no effort at all.  What a
> > sensational improvement in the Mark V.
> >
> > 73 and Happy DXing,
> >
> > Mike Schatzberg
> > WB2AJI
> > ----- Original Message ----- 
> > From: "Bob Main" <bobmain1 at alltel.net>
> > To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
> > Sent: Sunday, January 23, 2005 7:24 PM
> > Subject: Re: [1000mp] roofing filter and menu 9.1
> >
> >
> >> Just wondering how do you know what to turn it down to?
> >>
> >> Bob
> >> KB4CL
> >>
> >> ----- Original Message ----- 
> >> From: "Jim W7RY" <w7ry at centurytel.net>
> >> To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>;
> >> <1000mp at mailman.qth.net>
> >> Sent: Sunday, January 23, 2005 6:36 PM
> >> Subject: Re: [1000mp] roofing filter and menu 9.1
> >>
> >>
> >> > When I installed my roofing filter in my MK-V 1000 MP I had to turn
my
> >> > menu 9.1 from 13 down to 10.
> >> >
> >> > You most likely will need to do the same.
> >> >
> >> > 73
> >> > Jim W7RY
> >> >
> >> >
> >> > At 01:27 PM 1/23/2005, Kostas SV1DPI wrote:
> >> >>  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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> >>
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> >
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