[1000mp] INRADS Roofing Filter

[Bob Main]

Somebody mentioned something that, if I understood them right, you don't 
need any test equipment.  Since the Mark V has duel receivers and I don't 
think the sub VFO would go through the roofing filter then logic would say 
the I could tune both receivers to the same signal and then adjust 9-1 so 
that the main receiver matches the sub-VFO.  Sure would make things a bit 
easier, although the EG-1 that was mentioned is not that much, so may get 
that anyway to do mine.

73s
Bob
KB4CL

----- Original Message ----- 
From: "Thomas Otterbein" <mailbox at otterbein-inet.de>
To: "'All about Yaesu 1000mp'" <1000mp at mailman.qth.net>
Sent: Saturday, February 05, 2005 10:08 AM
Subject: RE: [1000mp] INRADS Roofing Filter


> Hi Bob,
> due to missing measuring instruments, I compared before installing the
> Roofing Filter The FT100 MP MkV Field with the FT897D, for noise and
> for the sensitivity.
>
> I guess the Roofing Filter brings some db amplifying for the filter
> losses. The sensitivity, compared with the first comparison with the
> FD897D brings no benefit or losses. It is the same.
>
>>>Dumb question, if you cut back on the IF-Gain BEFORE you install
>>>the roofing filter won't that also cut back on the noise?
>
> Yes....it would.
>
> 73 de Thomas
> DG8FBV
> ---
> mailbox at Otterbein-INet.de
> www.Otterbein-INet.de
>
>
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