AETHERPHON, global theremin family

--- In aetherphon@yahoogroups.com, "David VanHorn" <microbrix@...> 
wrote:
>
> What frequencies are the oscillators running at?
> I'd try to separate them by at least 30-40kHz to avoid audible mixing.
>

The tone oscillators are around 190 KHz, the volume circuit is running 
in the neighborhood of 400 KHz. I haven't checked recently. I almost 
threw this thing in the lake Saturday. The oscillators were literally 
driving me crazy. They would stop working if you touched the antennas 
or even looked at it crooked.

Sunday afternoon I found a Navy technical text on the internet that 
dealt with this sort of thing with Hartley style oscillator 
instabilities and I just changed a couple of biasing resistor values, 
and VOILA, the thing WANTS to work now. I was VERY concerned that if I 
made (make) major modifications to the circuitry of Mark's design to 
make it work it will not sound right. 

I don't have a LOT of experience about how a theremin is supposed to 
sound but Kevin your statement means a LOT to me. All this frustration 
and hard labor has not been for naught.

Thanks

Philip