[TenTec] Inrad Roofing Filters for Omni VI

[W.D. (Doc) Lindsey]

Bill:

Just wondering where Inrad could be convinced to build a small run of
filtres if a certain number of folks were to order at the same price, and
pay in advance, etc.?  Whatsay?
Might well be worth investigating.  Just a thought.

73,
--Doc/K0EVZ


> [Original Message]
> From: Bill Cotter <n4alg at qx.net>
> To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
> Date: 6/14/2007 4:33:08 PM
> Subject: Re: [TenTec] Inrad Roofing Filters for Omni VI
>
> Paul,
>
> I have installed the two 400Hz Inrad filters (#750/#759), in 
> addition to the 600Hz roofing filter (#763) and board. I can tell 
> you from my perspective, after replacing the TT 2x500 and 2x250 
> filters, that the choice was worth the expense. My primary usage is 
> CW DX'ing for the weak ones, in crowded and noisy conditions.
>
> The 400Hz filters are razor sharp, very low ringing, and seem to 
> enhance the signal by diminishing the noise power in the passband. 
> I seldom the TT NR-DSP because of the distracting artifacts, but it 
> REALLY is more useful with the Inrad filters - I think due to less 
> noise to process. And, as Clark mentioned, when you switch in the 
> roofing filter, the adjacent QRM disappears.
>
> The TT 250Hz filters drove me crazy with the hollow-ringing and 
> constant 'chasing' a weak signal around the passband. The 500Hz TT 
> filters were just the right width, but the shape factor always 
> seemed too large. I never had extra TT filters to swap around to 
> discover if there was anything unusual about the pairs I owned.
>
> After using the Inrad 400Hz filters, I bit the bullet and purchased 
> one of the #766 1,000Hz filters for the N2 position. I wanted a 
> 'wide' window for sleuthing around the band, and it is an absolute 
> delight. I just wish that Inrad would produce the compliment 6.3mHz 
> 1,000Hz filter. I have been advised that if they receive enough 
> orders, they will market one. For now, I continue to use the 1.8kHz 
> TT filter.
>
> 73 Bill N4LG
>
>
> At 11:52 AM 6/14/2007, you wrote:
> >I only see a couple of entries in the eHam reviews for the Inrad 
> >roofing
> >filters for the Omni VI.  I'm considering getting the CW version 
> >and would
> >appreciate any comments on the performance enhancement that these 
> >filters  provide.
> >
> >Thanks,
> >
> >Paul, K5AF
> >
> >
> >
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>
> ----------------------------------------------------------
> Bill Cotter, N4LG             E-mail: n4alg at qx.net
> 173 Carolyn Lane               Home: (859) 887-5563
> Nicholasville, KY 40356-9340   Work: (859) 323-6474
>
> ARRL   ARCI #9878   QRPl #1646   QCWA #29393   FISTS #4535
> ---------------------------------------------------------- 
>
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