On reading the buyer comments on the ebay post that Bob-B cites I now
realise that this is the pressure cutout / regulator switch. Obvious in
retrospect (brain had not licked in apparently).

Which makes some difference to what I wrote. As happens ...


     R
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.