Etherwave antenna coatings - rubber, paint?

Posted: 5/8/2009 5:50:01 PM

From: Croxley Green, Hertfordshire, UK

Joined: 10/5/2005

Sorry to go off topic, but

[i]I view the theremin in what some consider an unorthodox perspective. As many believe the relationship between the Thereminist and pitch antenna is a capacitive effect I have observed it to be more of a transfer of energy from the theremin to the Thereminist.[/i]

There [i]is[/i] a flow of energy across an earthed capacitor in an oscillator - for example this simulation ( It's what capacitors do with alternating current, ergo it's a capacitive effect.

(Incidentally, the site mentioned is full of excellent java applets for non-electricians such as myself. It even has memristors! They do interesting things to waveforms. I've emailed the owner to ask if he will do a simulation of a beat frequency oscillator. :-)

[edit]Maybe he doesn't need to! Right click on a black part of the java applet - you can make your own circuits, and the whole java program is downloadable from here ( (I'd send the site owner a copy of the circuit for inclusion.)[/edit]
Posted: 5/9/2009 12:35:55 AM

From: Eastleigh, Hampshire, U.K. ................................... Fred Mundell. ................................... Electronics Engineer. (Primarily Analogue) .. CV Synths 1974-1980 .. Theremin developer 2007 to present .. soon to be Developing / Trading as . ...................................

Joined: 12/7/2007

Wonderful site, Gordon!
It would be great if someone released a simulation package which generated a Java applet from simulation results.. At present, if one does a simulation on any of the good simulators, these can only be viewed by those who have the same package and know how to use it.
There are some real good free simulation packages available (LTSPICE ( is probably the best by far) but these take a lot of learning if one is not an engineer..
These Java applets look like a good solution - The site is particularly interesting because some unusual circuits are simulated (log amp for example).
Posted: 5/9/2009 5:27:21 AM

From: Croxley Green, Hertfordshire, UK

Joined: 10/5/2005

I'm taking the circuit simulator to a new thread. here (

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