[sdiy] Question: Vactrol equivalent - Korg PS3100

[Kevin Lightner]

>My Korg PS-3100 has some LDRs in it - three are "HTVP873D" and 
>another three are "HTVP873-G35-201B" and I want to buy some spares.
>
>The first type contains two LDRs with a common terminal, the second 
>type is a standard single LDR.  I have searched and visited several 
>websites but, short of demounting the LDRs and measuring them, I 
>don't know their characteristics and can't see what equivalents 
>there might be. the Perkin Elmer site didn't throw up any 
>equivalents.
>
>Does anyone know these devices, or can anyone tell me model numbers 
>for some similar ones?
>
>Cheers
>
>RMC, England


Fwiw, I just restored a 3100.
They have 154 electrolytics in them (and yes, I changed them *all*!)
Amazing to see so many Korg35 filter chips in there too.
One broken 3100 could help a lot of MS-20's. ;-)
I'd think these hybrid chips would fail more quickly than the LDRs, 
but I know there's some substitutes available.
Not an easy synth to access the key contacts for cleaning either :(

-- 
Regards,
Kevin Lightner

Myself: http://www.synthfool.com
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