Theremin?

[John M Iverson]

RCA made a therimin in the early 30s. the circuit is in a riders manual,
 don't remember the one, but with interest i can go down in the dungeon
to find it.   73   old jack
Jack Iverson    K0EWU    jackiv at juno.com
ARRL,  IEEE LM,  RCA, AMI, ARCI, QCWA

On Sun, 4 Apr 1999 06:48:11 -0700 Chris Trask <ctrask at PRIMENET.COM>
writes:
>On Sun, 4 Apr 1999, Will White wrote:
>
>> I just saw a very interesting video about Leon Theremin and his
>musical
>> "instrument," called a Theremin, which he invented in the 1930's.
>From
>> what scant technical information the film presented, I gather this
>was a
>> device composed of one or more oscillators, an audio amp, two
>antennas,
>> possibly an RF amp. All vaccum tube electronics, 'played" apparently
>by
>> using the hands around and about the device, varying hand
>capacitance
>> effects. Remember the Beach Boys tune "Good Vibrations" and that
>> wavering, organ-like sound? That's this thing.
>>
>> I seek further info about this odd marriage of radio and music,
>possibly
>> even a schematic. I'd like to give a shot at building one.
>> --
>>
>
>        The Theremin has a single oscillator.  The one "antenna"
>controls
>the pitch, or frequency, and the other controls the volume.  There
>have
>been a few commercial ones available over the years (I don't remember
>as to where), and there were some articles to build them in Popular
>Electronics and/or Electronics Illustrated back in the 60's.  I don't
>recall ever seen a vacuum tube version, but I'm quite sure that there
>must be one someplace.
>
>        I'm curious about the video.  Where did you see/find it?
>
>
>     ,----------------------.       Circuit Design for the
>    /    What's all this     \            RF Impaired
>   / extinct stuff, anyhow?  /
>   \  _______,--------------'        Chris Trask / N7ZWY
>  _ |/                               Principal Engineer
> oo\                                 ATG Design Services
>(__)\       _                          P.O. Box 25240
>  \  \    .'  `.                  Tempe, Arizona 85285-5240
>   \  \  /      \
>    \  '"        \                     Technical Editor,
>     .       (  ) \                      QRP Quarterly
>      '-| )__| :.  \                     QRP ARCI 9464
>        | |  | | \  '.
>       c__; c__;  '-..'>.__      Email:  ctrask at primenet.com
>                               http://www.primenet.com/~ctrask
>
>                    Graphics by Loek Frederiks
>
>--- --- --- --- --- --- --- --- --- --- --- --- --- --
>To subscribe: listserv at listserv.tempe.gov
>and in body: subscribe BOATANCHORS yourfirstname yourlastname
>To unsubscribe:  listserv at listserv.tempe.gov
>and in body: signoff BOATANCHORS
>Archives for BOATANCHORS: http://www.tempe.gov/archives
>--- --- --- --- --- --- --- --- --- --- --- --- --- --
>

--- --- --- --- --- --- --- --- --- --- --- --- --- --
To subscribe: listserv at listserv.tempe.gov
and in body: subscribe BOATANCHORS yourfirstname yourlastname
To unsubscribe:  listserv at listserv.tempe.gov
and in body: signoff BOATANCHORS
Archives for BOATANCHORS: http://www.tempe.gov/archives
--- --- --- --- --- --- --- --- --- --- --- --- --- --