[AMRadio] Tube Theremin


Ken Zuercher hepcatrevival at yahoo.com
Thu Mar 26 23:49:16 EDT 2009


I went and found the book. I'll get it scanned at school (I'm now a music teacher) by this weekend so we can post it. It's funny to read the old style schematics.
ken


--- On Thu, 3/26/09, sbjohnston at aol.com <sbjohnston at aol.com> wrote:

> From: sbjohnston at aol.com <sbjohnston at aol.com>
> Subject: Re: [AMRadio] Tube Theremin
> To: amradio at mailman.qth.net
> Date: Thursday, March 26, 2009, 11:02 PM
> Ken, that sounds great.  We could also post it online for
> others.
> 
> Thanks...
> 
> Steve WD8DAS
> 
> sbjohnston at aol.com
> http://www.wd8das.net/
> ---------------------------------------------------------
> Radio is your best entertainment value.
> ---------------------------------------------------------
> 
> 
> -----Original Message-----
> From: Ken Zuercher <hepcatrevival at yahoo.com>
> To: Discussion of AM Radio in the Amateur Service 
> <amradio at mailman.qth.net>
> Sent: Thu, 26 Mar 2009 8:36 pm
> Subject: Re: [AMRadio] Tube Theremin
> 
> 
> 
> 
> Steve,
> I have a manual for what I believe is the first
> commercially available 
> Theremin
> made by RCA in the 1930's. It uses the same hetrodyning
> principal but 
> uses some
> oddball transformers that would give us fits to replicate.
> I can try to 
> scan the
> manual with schematic if you're interested. It is
> fascinating.
> Ken Zuercher KC8QO
> 
> 
> --- On Fri, 3/20/09, sbjohnston at aol.com
> <sbjohnston at aol.com> wrote:
> 
> > From: sbjohnston at aol.com <sbjohnston at aol.com>
> > Subject: [AMRadio] Tube Theremin
> > To: amradio at mailman.qth.net
> > Date: Friday, March 20, 2009, 4:08 PM
> > I've got a new sort-of AM project on the bench
> here
> > now:? a tube Theremin.? This musical instrument
> produces
> > sound by heterodyning two
> > oscillators that run in the low-end of the broadcast
> band.
> > I'd like to find three Miller 70-OSC coils or
> > equivalent for this rig - anyone have some??
> >
> >
> >
> > If you are interested in the circuit, I'm building
> upon
> > the ideas of Doug Forbes that I found online.?
> >
> > See
> >
> > http://www.wd8das.net/theremin.gif
> >
> > and
> >
> > http://www.wd8das.net/theremin.txt
> >
> >
> >
> > Thanks...
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Steve WD8DAS
> >
> >
> >
> > sbjohnston at aol.com
> >
> > http://www.wd8das.net/
> >
> >
> ---------------------------------------------------------
> >
> > Radio is your best entertainment value.
> >
> >
> ---------------------------------------------------------
> >
> >
> >
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