I am building a switchbox to allow use of a Heil PR-781 microphone to be
used by my K3S and K3, the switchbox using XLR connectors. I note that
in the Heil XLR cable ended in an 8-Pin Foster has mic low (-) tied to
ground and (+) tied to mic high.
Knowing that the XLR pin 1 should be chassis ground, my question is, "At
the switchbox, should I tie XLR pins 1 and 2 together and only switch
XLR pin 3 between radios?" IOW, should XLR pins 1 and 2 be chassis
grounded or should I chassis ground pin 1 and switch both XLR pins 2 and 3?
Thanks in advance.
73,
Dan
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