I don't believe this is the story for this mod. I exchanged notes with
George at INRAD this afternoon related to this question - it was also my
concern. However, I believe what this mod is probably doing (and George
wouldn't be specific) is to improve the coupling between stages such that
the full 2400 Hz bandwidth will be getting through, not just 1600 Hz of
it as he attributes to the current design. The mod does not affect the
filtering effectiveness, but allows you to hear what should be getting
through (as George describes it). I plan to put the mod on my VI+ to see
what improvement is heard. I have the 1.8 kHz Network Science filter
also, and am hoping the mod improves audio through both filters. Since I
had to do a similar mod on my previous rig (IC-765) while fixing the AGC
(and a few other things), I'm interested to see what this one
accomplishes.
73, Duane AC5AA
On Thu, 1 Mar 2001 20:43:18 -0500 "John Pritt" <n1jp@arrl.net> writes:
>
> For all you contesters and operators alike, remember that the
> filters in the
> Omni 6 are cascaded. What this means is in achiving higher fidelity,
> you
> loose selectivity! With the stock 2.4 filters, that come standard
> with the
> rig, plus any that you add to the 9 and 6.3 mhz filter positions,
> these are
> all cascaded to provide extremely excellent steep filter walls. This
> is just
> what the doctor ordered for phone contesters and DX
> chasers....minimal QRM
> from outside the passband. I can even remember those who talked
> about how
> nice it would be if the roofing filter could be replaced with a 2.4
> mhz
> filter! But....if you are a ragchewer and QRM is not a factor, then
> this
> Inrad mod is for you.
> 73.........John
>
>
> --
> FAQ on WWW: http://www.contesting.com/FAQ/tentec
> Submissions: tentec@contesting.com
> Administrative requests: tentec-REQUEST@contesting.com
> Problems: owner-tentec@contesting.com
>
>
Duane A. Calvin, AC5AA
Austin, Texas
ac5aa@juno.com -or- ac5aa@austin.rr.com
Day: dacalvin@us.ibm.com
--
FAQ on WWW: http://www.contesting.com/FAQ/tentec
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Problems: owner-tentec@contesting.com
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