[Hallicrafters] HT-32 WHAT IF THING

[Peter May]

I think we had one of these back in the days of B&W TV servicing.
In the end it became one of those devices thaty never got used.

Regards
Peter
----- Original Message ----- 
From: "Charlie" <pincon at erols.com>
To: <Hallicrafters at mailman.qth.net>
Sent: Tuesday, December 14, 2004 9:51 PM
Subject: Re: [Hallicrafters] HT-32 WHAT IF THING


> Hey, don't laugh.  I remember a signal generator that had a device in it
> they
> called a "Wobulator" for Frequency Modulation.  Basically it was a voice
> coil and magnet that drove an aluminum plate which was part of the L-C
> circuit for the RF oscillator.  An audio output stage drove it and you
> simply turned up the "volume" to get more deviation!
> 
> 73' Charlie k3ICH
> 
> ----- Original Message ----- 
> From: <k0ewu at juno.com>
> To: <Hallicrafters at mailman.qth.net>
> Sent: Tuesday, 14 December 2004 7:52 AM
> Subject: [Hallicrafters] HT-32 WHAT IF THING
> 
> 
> >         This should be an April Fool thing?
> > As we know the 7360 is very sensitive to external magnetic fields the
> > normal shield
> > is of a magnetic shield such as "conetic"
> > So if we wanted am from the -32 why not use the voice coil from an old
> > speaker placed around the tube.
> > Then using a small audio amp with a microphone feeding the "voice coil"
> > now known as a magnetic modulator, to alter the magnetic field at an
> > audio rate.
> > This should result in carrier injection detectable in a receiver as am?
> > old   jack
> >
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