[sdiy] VTL vs. H11F

[Neil Johnson]

lanterma at ece.gatech.edu wrote:
> IIRC it didn't do that vactrol ringing thing - it responded much
> faster. So it was definely its own thing.

Do vactrols "ring"?  What part do they store the energy?  Do they 
exhibit significant inductance or capacitance (or both)?  I thought they 
were just an LED and a cadmium-sulphide cell.

Neil
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