At 06:28 PM 5/25/2004 +0300, you wrote:
> > Thanks Peter.  Do you know what type of part the C1701C is?
>
>No idea. Try to find it in a NEC catalog. The full part name is uPC1701C.
>It seems to be a phase control element, perhaps with hysteresis. My
>equivalence book says it's a triac control with zero-crossing switching
>(i.e. not a phase control?) and gives equivalent Samsung KA2804. The u in
>uPC is the greek letter mu. The thermostat in the 936 is not proportional,
>it is on/off type. This would match what you describe.

Yes, it looks similar to some of the old RCA (nee GE) circuits for that
function. Here's the data sheet, though not in English:

http://www.necel.com/nesdis/image/IC-7935A.pdf

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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