[QuadList] QuadList Digest, Vol 17, Issue 14

[Peter Ford]

Hi

The RCA heterodyne idea came from an existing High Frequency Communication 
receiver design.

The British Racal RA17 Receivers used a heterodyne system called the Barlow 
Wadley loop to cancel drift in receiver tuning.

Peter Ford
pford at clear.net.nz



> Date: Tue, 10 Nov 2009 16:57:25 EST
> From: Chill315 at aol.com
> Subject: Re: [QuadList] RCA Hetrodyne Process and Early Color
> To: quadlist at quadvideotapegroup.com
> Message-ID: <c98.5bb58277.382b3bc5 at aol.com>
> Content-Type: text/plain; charset="us-ascii"
>
> The second process has to be both unstable signals.  The only way for 
> this
> to work is to use both signals that have the same errors in them to cancel
> out the errors.  The interesting part is that it is so simple.
>
> Error plus stable equals New Error.
> New Error minus Error now gives stable.
>
> It is so interesting how they came up with it.
>
> So what happened to the TRT?
>
> Chris Hill
> WA8IGN