[sdiy] AS3350 vs CEM3350

[Tom Wiltshire]

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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