[TenTec] Orion Roofing Filter Cut In

[Bernard(wtrone)]

    It looks like Steve and I have sparked a very interesting discussion
about roofing filters.

    My original premise was that in the automatic mode, both the 1.8 and 2.4
kHz filters were too narrow because I have difficulty copying SSB signals
that are less than 1.8 kHz.  I think that 1.8 is just too narrow for me and
possibly most SSB QSOs.  I first noticed this on a Drake R4-C that I bought
back in the late 70s (no it didn't have the Sherwood mods).

    I still think that a 3.5 kHz (or something like it) would have been a
better choice for SSB operation.  I suspect that TenTec offered the 1.8 and
2.4 because they were already available.

    Anyone try a wider filter in the 2.4 slot?

    Anyone else run the 1.8 and 2.4 filter listening tests like Bill did?  I
would be interested in know if you can hear any difference between the two
filters with the DSP set at 1.750 kHz or less.

            73,

            Bernard, WA4OEJ


----- Original Message ----- 
From: "Bill Tippett" <btippett at alum.mit.edu>
To: <tentec at contesting.com>
Sent: Friday, August 06, 2004 6:44 AM
Subject: [TenTec] Orion Roofing Filter Cut In


> N4LQ wrote:
>  >The Omni 6 uses a 15 khz filter at the beginning of the 9 mh   zIF.Inthe
> manual, TenTec refers to it but does not call it a roofing filter. The
> roofing filter hype didn't begin un  tiltheOrion.
>
>          If you call outstanding IMD and BDR performance "hype", that
> began with Sherwood's introduction of the 600 Hz roofing filter for the
> R4C in the 1970's.  I don't call that hype.  I call Icom's use of words
> for the 7800 like "unparalleled, astonishing, ultimate, Masterpiece" and
> pseudo non-qualified "specs" like "+40 dBm IP3" and "110 dB dynamic
> range" hype.  "Hype" implies something beyond truth and facts.
>
>                                          73,  Bill  W4ZV
>


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