Thanks again to all those who responded to my posting about reed relays.  As
always, the people on this list have been very helpful with a variety of
insights.  From the info posted I have decided to do the following:

It is now my belief that the protection diodes on the PICs are capable of
suppressing the flyback energy from the reed relay but I have selected a
device with integral diodes just to be sure (better safe than sorry).

I now believe that the reed relays will couple less power supply noise to the
signal than a normal relay does but that the coupling is not zero.  I,
therefore plan to use reed relays where my signal is strong and low impedance
but will use latching relays in the sensitive, high-impedance areas.

Thanks again to all who posted.
IMHO it is these application threads that are most interesting on this list.


Mark A. Corio
Rochester MicroSystems, Inc.
200 Buell Road, Suite 9
Rochester, NY  14624
Tel:  (716) 328-5850 --- Fax:  (716) 328-1144
http://www.frontiernet.net/~rmi/

***** Designing Electronics For Research & Industry *****