Finished a new module

[Dempsey Elks]

Eric Barbour wrote:
> 
> It's a quad VCO, made with only 5 tubes. Four 5696 thyratrons
> and a 12AT7.
> 
> It's fat, baby.
> 
> Tech-heads will not be happy, no doubt some of them will claim that such
> a primitive circuit can't possibly work and be stable. Sorry.....
> 
> An extra bonus: the ionized argon is visible from the sides of the
> 5696s due to their unusual construction, with an open anode consisting
> of a narrow strip of metal with the control electrodes behind it.
> It gives a nice purple haze which pulses visibly as the oscillator
> pitch goes up and down.
> 
> --
> Eric Barbour
> Svetlana Electron Devices
> Portola Valley CA USA


Tell us more!
Are you releasing schematics?