[sdiy] LDR decay time (was "2SA798 data")

[Paul Higgins]

Isn't there a Japanese brand of LDRs, Hamamatsu (sp?), that has a 
faster response than most?  But I imagine the decay time is still 
proportionally as long with respect to the attack time.  I remember 
some people had mentioned the Japanese brand as being so fast that they 
were more like VCAs when used in compressors, Mutron III clones, etc., 
and not suitable when you want the "soft" switching/turn-on 
characteristics of LDRs (e.g. the way that Mesa/Boogie uses literally 
dozens of Vactrols in their amps--my Quad Preamp has 32!).

-PRH

On Wednesday, April 28, 2004, at 05:55 AM, Harry Bissell Jr wrote:

> Arrgh you can say that again...
>
> in fact you could say that ALL photoconductive
> cells turn on faster than they turn off...
>
> (and in general, the higher the resistance range
> the longer the turn off time)
>
> This is due to the fact that you can bombard the
> cells with as many photons as you like (limited by
> vaporizing the cell :^) ... but you cannot remove
> any energy...
>
> unless you have a flashDARK...
>
> H^) harry


Paul Higgins
email: higg0008 at tc.umn.edu