Most of these noise problems could be cured by replacing all those
transistors with tubes.
Steve N4LQ
----- Original Message -----
From: James D. Duffer <jduffer@mnsinc.com>
To: <geraldj@ames.net>
Cc: rohre <rohre@arlut.utexas.edu>; tentec list <tentec@contesting.com>
Sent: Sunday, July 25, 1999 6:42 PM
Subject: Re: FW: [TenTec] Omni VI plus - noise
>
> Dr. Gerald N. Johnson, P.E. wrote:
> >
> > Its not true that a twin-tee notch filter in the feedback will cause
> > greater reduction in the noise at the notch frequency. Quite the
> > contrary, a twin-tee notch filter in the feedback makes a bandpass
> > amplifier. At least 4 decades ago, maybe 6, General Radio based an audio
> > spectrum analyzer (manual type) on a twin-tee feedback network and an
> > amplifier.
> >
> > Oh, it takes three R and three C to make a twin tee network.
> >
> > 73, Jerry, K0CQ
>
> Wouldn't it make a difference if the twin-tee was included in
> degenerative vs a regenerative feedback. I would think it would make a
> big difference. In the above context, what kind of feedback? Just
> wondering??
>
> 73,
>
> Jim WD4AIR (FAA Retired)
>
> --
> FAQ on WWW: http://www.contesting.com/tentecfaq.htm
> Submissions: tentec@contesting.com
> Administrative requests: tentec-REQUEST@contesting.com
> Problems: owner-tentec@contesting.com
> Search: http://www.contesting.com/km9p/search.htm
>
>
--
FAQ on WWW: http://www.contesting.com/tentecfaq.htm
Submissions: tentec@contesting.com
Administrative requests: tentec-REQUEST@contesting.com
Problems: owner-tentec@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|