Many thanks, senior_falcon!
"Wow, that Melodia has a really nice bowed string timbre! And nice playing too!" - Dewster
I agree - real lovely.. Got me scratching my head a bit though! - by far the best sound I have ever heard from any diode mixer - Kind of wondering if the "crude" VCA topology is giving an asymmetrical bias to the audio (giving more ramp-like qualities to the waveform) or whether its just the low-z oscillator drives, or a combination of both..
But the thereminist may also have a lot to do with it..
If I am correct, bisem played your (Dewsters) modified EW - And it also sounded wonderful...
One thing puzzles me a bit on the schematics.. If the PNP transistors were germanium and the NPN's silicon, I would have expected the values of R7 and R8 to be different for the two builds.. As it stands, both have 150k / 22k, which, with a 6V supply, puts the bias voltage at ~0.76V .. Now to me, this looks a little on the high side even for silicon - but for germanium I would be surprised if the theremin ever went silent! (I dont actually see how it could...)
I am probably being silly and missing something obvious which will make me go "duh!" when I see it ! ;-)