Curiously, I have also seen a recent insertion loss when selecting the 500
Hz filter in my 585 Paragon. I never could tell much difference (especially
looking at a waterfall display) between the 500 and 250 Hz filters, so I've
resorted to just using the 250. They were both essentially equal until the
last few months, and equal to the 1.8 and 2.4 filters as well, but now
signals are lower when the 500 is selected. I haven't tried reseating them
or anything at this point. If you work on it, let me know what you find.
=Vic=
WA4THR
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To: Kimberly Elmore <cw_de_n5op@sbcglobal.net>, Discussion of Ten-Tec
Equipment <tentec@contesting.com>
Subject: Re: [TenTec] On Crystal Filters
From: Bwana Bob <wb2vuf@verizon.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 30 Oct 2014 22:16:01 -0400
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Well, all components age, including crystals. I haven't noticed any problems
with the filters in my 44 year old Heath HW-100. I have noticed increased
insertion loss in the 500 Hz Ten Tec filter in my Paragon. I haven't had
time to open it up and swap filters around to see if the problem is in the
filter or the circuit. If it's the filter, I'll try replacing caps on the
filter board. If that doesn't work I guess I'll have to replace the filter.
The selectivity is fine; it just knocks the signal down, compared to the 1.8
ans 250 Hz filters in the rig.
73,
Bob WB2VUF
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