No, not dumb. Put a fuse in the -48 leg.
Hopefully neither the radio or the power supply connect either side to
ground. If one of them does the other needs to be floating or matching.
-----Original Message-----
From: Sterling Jacobson
Sent: Friday, February 17, 2017 3:15 PM
To: '[email protected]'
Subject: [AFMUG] DC -48 voltage grounding
Is it dumb of me to run a pair of wires up a tower 30 feet to connect DC
voltage to the radio straight to the power supply in a cabinet at the base?
If so, what do I do to ground it or fuse it or isolate it?