[ICOM] Icom 746 filter mod

[D C *Mac* Macdonald]

Icom's filters are supplied with a perfect-fit plastic
"gasket" to serve the insualtion purpose.  I lost one
but put a piece of heavy-weight printer paper on
a towel, pushed the filter down onto it, traced
around the filter edges with a Sharpie marker,
then cut the paper out just a bit larger.  This
worked like a charm in my 746.

73 - Mac, K2GKK/5
Oklahoma City,OK



----Original Message Follows----
From: "Anders Janis SM4RNA" <sm4rna at telia.com>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: "ICOM Reflector" <icom at mailman.qth.net>, <ic746 at yahoogroups.com>
Subject: Re: [ICOM] Icom 746 filter mod
Date: Tue, 6 Mar 2007 21:28:30 +0100

I have done that. I found that I needed to put thin plastic spacers on the 
connector pins on the filter as otherwise the filter may short out some 
tracks on the PCB.

I put in a 2,4 INRAD  #109 and combined that with a 350Hz and a 1,9kHz 
filter in the 9MHz IF.

Big difference with a crystalfilter instead of the Murata. I think it would 
be boring to listen to some stations with narrower then the 2,4kHz in 455kHz 
IF. If needen I had the 1,9 in 9MHz IF and also the PBT if needed.

I do not have the 746 no more, but that is becaurse other issues,,,

de SM4RNA Anders