[sdiy] Looking for CEM5530 or replacement

[Cary Roberts]

>Fair points. Anything that minimises the damage you have to do has to 
>be a good idea. I got the impression they weren't that impressed with 
>the original power supply, though, didn't you?

It's pretty well understood that power supply design was not Sequential
Circuits' strong point. :)

>With respect to the chip, the Maxim one wouldn't be the only option. 
>There are also some 32-channel Analog Devices chips and you could 
>probably design something very similar around one of those. Maybe 
>they're cheaper too, who knows!

I prefer discrete components over custom ICs.  I'd rather see something
using discrete 3:8 analog demuxes and quad opamps with individual hold
up caps.  Assembly cost/time is far greater than a monolithic solution
but it will be repairable in 10 years.  Unfortunately the replacements I
made in 1997 used PDA508s which are now cost prohibitive for
replacement.  Had I used TL084s it'd still be repairable now and in 10
years, not that any of my PDA508 based boards have died yet.

-Cary