[sdiy] voltage-controlled AM radio tuning

[Loscha]

My thoughts were going towards switching more caps/coils in parallel
with cd4066 or what have you to extend range. Flicking them on and off
in patterns could "Arpeggiate" the timbres generated. I think
Stockhausen did a similar sounding thing (with splicing, of course) in
Hymnen.

-ErJ

On Sat, Mar 21, 2009 at 3:38 AM, Donald Tillman <don at till.com> wrote:
>
> [Talk of varactors and tuning AM radios...]
>
> Okay guys, here's how you do it.
>
> Screw the varactor...  Get a servo motor and controller, attach a
> large plastic hand and arm to it, like from a store manikin, but
> you'll want something with fingers that can grip a knob.
>
> Set it up on stage; An actual AM, FM or shortwave Radio, the fake arm
> and hand, and the servo motor.  It'll look great, and the audience
> will enjoy watching the detatched hands move and be able to relate to
> where the noises are coming from.
>
> Have a second servo hand turn the band select switch between AM, FM
> and the various shortwave bands.  Add more radios and more servo
> hands.
>
> Add a TV set; an old style one with a channel tuning knob.  And just
> for effect you'll want an additional servo hand on the horizontal hold
> or tint knobs.  Or solenoids operating a remote control.
>
> That's so much more fun than a varactor.
>
>
>  -- Don
>
> --
> Don Tillman
> Palo Alto, California
> don at till.com
> http://www.till.com
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