[1000mp] Roofing Filter

[Michael Raskin]

Good memory, Ken.  I did that and the sub is S-9.  The main is one dot below 
S-9 with the IF Gain (menu 9-1) between 18-31.  The MK-V just came back from 
Yaesu with the IF gain set at 31 and a new CPU chip (ver. 2.17) installed. 
I'm wondering if it has anything to do with the new chip.

----- Original Message ----- 
From: "Ken KW0A" <kw0a at mindspring.com>
To: "Art Searle W2NRA" <art at w2nra.com>; "All about Yaesu 1000mp" 
<1000mp at mailman.qth.net>
Sent: Monday, February 13, 2006 1:28 PM
Subject: Re: [1000mp] Roofing Filter


>I recall seeing that a good way to handle it is after installation is to 
>inject a 50 microvolt signal and adjust 9-1 for an S9 reading on the main S 
>meter. The subVFO may not go through the same filters and the readings 
>between the S-meters may be different to start with. This does usually 
>correlate with adjusting the setting by 1 or 2 notches. This is also by 
>'selective recall'.
>
> Ken KW0A
>
>
>
> -----Original Message-----
>>From: Art Searle W2NRA <w2nra at optonline.net>
>>Sent: Feb 13, 2006 11:03 AM
>>To: All about Yaesu 1000mp <1000mp at mailman.qth.net>
>>Subject: Re: [1000mp] Roofing Filter
>>
>>Hi Douglas,
>>
>>I seem to remember that the only reason for the reduction was for those 
>>that
>>installed the 70MHz IF mod that required an increase in the IF gain.  The
>>later IF kits didn't.  So if you have a later IF kit installed or no kit 
>>at
>>all you should consider making no change to the IF gain on installing the
>>Roofing Filter.  Can anyone back me up on this?  This is, of course,
>>assuming my memory serves and it usually doesn't.  When it comes to memory 
>>I
>>have Selective Total Recall.
>>
>>73 Art W2NRA
>>
>>From: <KB9GKC at aol.com>
>>
>>>
>>> In a message dated 2/12/2006 11:12:16 P.M. Central Standard Time,
>>> rask1553 at bellsouth.net writes:
>>>
>>> Before  installing the roofing filter, I checked my IF gain setting
>>> (hidden
>>> menu  9-1) and it was 31.  I believe most were claiming that the setting
>>> was
>>> between 11 to 13 and that they had to reduce it one or two units after 
>>> the
>>> mod.  Why is mine set at 31?
>>>
>>>
>>>
>>> When the factory alignment is done the numbers for the IF gain land all
>>> over
>>> the place.  Don't worry about it, just make a note of it in the manual
>>> for
>>> future reference.
>>>
>>> Enjoy the roofing filter, it's exactly what the 1000MP needed to keep up
>>> with the new radios.
>>>
>>> 73
>>> Douglas
>>
>>
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>
>
> K. Kreski M.D.,A.B.I.M.
> KW0A  (EM48wx)
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>
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