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MKB, if you could please do so since I'm interested on those values. I'm building a second Neovibe soon. Peace...

sounds great! Thx for the interesting info and pics guys. Something I noticed with the photocells is that the "squigglies" are greater in number on the Fulltone version's photocells. On at least one pic I saved of an original, they were less. Does the number say anything as far as response time, etc? Oh yeah, (as far as Univibes) I also discovered apparently that the 2SC828 seem to be the same as BC147, as BC107 is basically the same (slightly different with collector dissipation or something). The progenitor of the 828 was 2SC538 which had the same type package as 107,8,9. Not sure if they will give greater mojo but IIRC for the Neovibe board the 107 pinouts do fit.

Torchy wrote:
... and has been discussed to death at Aron's. Even so far as 'scope measuring rise/fall times on several brands of photocells and optocouplers for repairing vintage gear.

sorry for reviving this old thread, but i'd find this comparison between various photocells very interesting - with all the measurements, etc., but i can't find the thread or site that Torchy was referring to. Looked in other forums too. In case you have a link, please let me know where to find this info. (i'm thinking about building a uni-vibe clone and want to read up on the various options for the LDR's that are out there).

Thank you!

VintageCharlie

Anybody here have Mega Vibe and maybe can check phase cap values if there are standard 15n/220n/470p/4,7n values?

Bump!