There are some opto couplers that appear in surplus sales (and are presumably
still manufactured) which are designed for rotary motion sensors. These have a
fairly large spacing (3/4 inch?) between diode and transistor, and with a bit of
black tape to ensure no extraneous light gets in, should do for the HV isolation
- especially with a slotted board. Condensation on a board can be real source
of trouble, and this isn't a situation where guard ringing is helpful.
73
Peter G3RZP
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|