Not only because of static, but also because of possible differences in
equipment ground references, ALL electronics should be off while
interconnecting devices with different power sources. Just is prudent not
to push your luck. There are lots of things with floating grounds that
might survive being plugged hot; but it is not worth the aggravation to find
out the "experimental" way. And, this issue may vary with time of the
year, and hence the static level being developed. Naturally, static is a
bigger problem in cold dry climates than the hot muggy seacoast.
Stuart
K5KVH
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