Mutron

[Kevin Lightner]

>>* The schemos suggest that 6 LDRs share one LED - did they manufacture a
>>special "hex Vactrol" then ?
>
>Probably.  My Mutron Phasor II has what looks to be a "quad Vactrol" in it -
>a weird black disk about 2 cm across and 1.5 cm thick, with 10 legs coming
>out of it.  My guess is that it is just an LED with 4 photocells glued to
>it, surrounded by black plastic to keep out light.  Slightly more advanced
>than the Univibe, but not by much.


I put up a pic of what's inside there.
It appears to be 3 dual photocells per LED for an effective total of 6 each.
All the opamps on the phasor boards are 4558's.

http://synthfool.com/diy/mutronldr2.jpg

-K