I once ran some scope tests on suppressed vs. unsuppressed relay coil
transients. The results were startling - an unsuppressed 28 vdc
hermetically sealed aircraft relay can easily generate 600 volt spikes
at the coil terminals. The addition of a back-biased diode across the
coil nearly eliminates the spike.
Bill wb0cld
Bill Launer
St. Charles, MO
launerb@crl.com
wb0cld@wb0cld.ampr.org [44.46.66.25]
qrp-l #279 qrp arci #3551
Grid Square EM48RT
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