[TenTec] INRAD Filter Question

[Paul Christensen, Esq.]

My experience has been that the symmetry (i.e., USB v. LSB) is better on the
INRAD filters but that their narrow filters tended to ring more than Ten
Tec's crystal ladder filters.  To the best of my knowledge, INRAD uses a
more conventional lattice filter design which tend to smear and cause
ringing of CW reception.

If you can find Ten Tec 1.8K and 2.4K filters with near perfect symmetry,
hold on to them.

By far, the worst stock filters I had ever heard were on a Kenwood TS-950S.
I had that radio for one week before trading it in on my current Omni Six.

-Paul, W9AC

----- Original Message -----
From: <tlogan7 at cox.net>
To: <tentec at contesting.com>; <geraldj at isunet.net>; <tentec at contesting.com>
Sent: Friday, May 23, 2003 16:43 PM
Subject: Re: Re: [TenTec] INRAD Filter Question


> I had the same experience Jim had. At first I thought I had done the right
thing on my Omni V with Inrad filters. However, I now have an Omni VI+ and
far prefer the TenTec filters. I would not put Inrads in it. My 2 cents.
73/Tim
> >
> > From: "Jim Reid" <jimr.reid at verizon.net>
> > Date: 2003/05/23 Fri PM 04:28:37 EDT
> > To: <geraldj at isunet.net>,  <tentec at contesting.com>
> > Subject: Re: [TenTec] INRAD Filter Question
> >
> >
> >
> >
> > > If anything its the other way around. Steeper skirts and squarer
> > > passband corners mean more ringing, and so the Inrad
> > > should ring more than the TT filters.
> >
> > And...INRADS come up again a ways out from the frequency band
> > shown in the example response curves.  That,  to me,  is
> > the great reason to stay with the Ten Tec filters and not
> > substitute the INRADS.  I did that a three or so years ago in the
> > OmniVI+ I had at the time.  For awhile I thought I had done
> > the correct thing;  then realized I had not.  To the fellow who
> > bought the rig from me,  I shipped the Omni to him equipped
> > 100% with the INRAD filters;  but,  for what he paid me,  I
> > also shipped to him every one of the Ten Tec filters that
> > I originally had....all the sockets were filled with TT filters.
> > He is an avid CW man,  and I suspect he has taken out
> > the INRADS and replaced the TT's back in,  hi.
> >
> > 73,  Jim  KH7M
> >
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec at contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec