[TenTec] Orion Roofing Filters

[Mark Erbaugh]

Rick,

Same here.  I thought I noticed a problem with the 250 Hz filter in my Omni
VI (opt 3), but when I mentioned it to TT service they explained that that
was how it was supposed to work. As a test, I just swapped the 500 and 250
Hz filters in the Orion and the problem followed the 250 Hz filter, so I'm
pretty sure the problem is the filter.

Any ideas on if the filter can be repaired?

Since you have a working 250 Hz filter in your Orion, if my filter can't be
repaired, do you think I should replace it? Have you encountered situations
where the 250 Hz filter made much difference over the 500 Hz filter?

73,
Mark

----- Original Message ----- 
From: "NJ0IP" <Rick at dj0ip.de>
To: <tentec at contesting.com>
Sent: Sunday, July 25, 2004 10:25 PM
Subject: RE: [TenTec] Orion Roofing Filters


> Mark,
>
> I had the same problem in my Omni V / VI / VI+, and then in my first Orion
> (without AT).
> What they had in common was the exact same 250 Hz filter.
> When I got my second Orion, it had another 250 Hz filter.
> I swapped the filters between the two Orions and the problem followed the
> specific (old) filter.
>
> I only kept the second Orion (with AT) and I kept the defective filter.  I
> will purchase a new 250 Hz filter for it.  It's obvious to me that my
filter
> has too much loss and for 14 years I thought it was a design problem.
>
> 73
> Rick
>
>
> -----Original Message-----
> From: tentec-bounces at contesting.com
> [mailto:tentec-bounces at contesting.com]On Behalf Of Mark Erbaugh
> Sent: Saturday, July 24, 2004 10:43 AM
> To: tentec at contesting.com
> Subject: Re: [TenTec] Orion Roofing Filters
>
>
>
> > I am running 1.371 and don't see any problem with the roofing filter
> control
> > software. It sounded like, from his last note, that Mark has his working
> > also. I think, at this point, it looks like there is not a problem in
this
> > area with 1.371.
>
> It's good to get confirmation that the problems I am having don't happen
on
> all Orions running 1.371, so it's probably not a firmware issue. I
> definitely have a problem with my Orion. If you look at the numbers in my
> last post. With the 250 Hz roofing filter engaged, signals in the center
of
> the passband are being attenuated almost 20 dB from what they are with the
> 500 Hz filter. (with 250 Hz filter signal S8, with 500 Hz filter signal 12
> dB over S9).
>
> I can see a couple of possibilities:
>
> 1) the filter is defective
> 2) the amplifier to adjust for filter insertion loss needs adjustment
>
> I'll give TT a call Monday morning.
>
> 73,
> Mark
>
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