[sdiy] AS3350 vs CEM3350

[Mike Bryant]

There's a few resistors that need values changing.  Google on MuggWiggler for the actual values

-----Original Message-----
From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Tom Wiltshire
Sent: 04 May 2021 13:57
To: synth-diy francesco mulassano via
Subject: [sdiy] AS3350 vs CEM3350

Does anyone have any experience with using the AS3350 as a replacement for the CEM3350? Or experience with the Rhodes Chroma’s calibration routines?

I’ve got a customer who’s trying to fix a Rhodes Chroma, replacing dead CEM3350s with AS3350s. The synth doesn’t like the AS chips and won’t calibrate the voices with them in. The CEM voices calibrate ok. Switching the chips around, the problem follows the chips.

It looks like there’s some difference in scale or response between the AS and the CEM, and the Chroma doesn’t have a wide enough calibration to be able to calibrate it out.

Any pointers gratefully received.

Thanks,
Tom

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       Electric Druid
Synth & Stompbox DIY
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