[Collins] 75S3B info

[Dan Cotsirilos K9DTC]

My understanding is when that foam deteriorates like that it greatly reduces 
the sensitivity (insertion loss). they have to be cleaned and repacked with 
cotton. at least that is the solution for the Yaesu mech filters.  Dan



----- Original Message ----- 
From: "Martin Sole" <msole at loxinfo.co.th>
To: "'Don and Diana Cunningham'" <wb5hak at sirinet.net>; "'Collins Radio 
Association'" <Collins at mailman.qth.net>
Sent: Thursday, June 23, 2005 8:43 AM
Subject: RE: [Collins] 75S3B info


>I will be interested to hear what others have to say about this. I found
> some similar decomposing foam type material in my 3B. Hope it's not the
> magic DX foam that allows the S line to hear signals others can't.
>
> 73
> Martin, HS0ZED
>
>
> -----Original Message-----
> From: collins-bounces at mailman.qth.net
> [mailto:collins-bounces at mailman.qth.net] On Behalf Of Don and Diana
> Cunningham
> Sent: 23 June 2005 06:34
> To: Collins Radio Association
> Subject: [Collins] 75S3B info
>
> I just got a very nice 75S3B in a S3 line today (73S3B, 32S3, 312B4, 
> 516F2,
> 30L1).  I am in the process of looking it over for obvious problems before
> "smoke testing", hi.  Under the filter cover on top of the chassis, I 
> found
> some foam packing around the filter that is doing some serious
> decomposition, to the point that it will crumble mercilessly when 
> touched!!
> Any reason to try to find/make a replacement foam for this??  If so, 
> anyone
> have a spare before I start looking for some foam rubber to cut up?
> Tks,
> Don, WB5HAK
>
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