[CTSARA] Power Supply gauge and voltage loss with the home rig

James Freire james.freire at gmail.com
Mon Nov 7 13:21:54 EST 2011


After seeing George's presentation and hearing Jon's question about the
gauge wire we use from the power supply to a rig at home, I examined my own
setup.

I had noticed that I was getting the same signal noise ratio from my FT920
as I was through my Elecraft K1 on a few skimmers on reversebeacon.net. Not
saying this is the best way of measuring my actual power output but it got
me wondering if my FT-920 was actually getting the power it needed.

I run a Yaesu FT-920 and what seems to be the stock power supply cable. It
was over  6' long.  It is also only 14awg.

I measured the voltage at the back of my rig with the key down. Turns out
my voltage was dropping down to 11.7v. I shortened the power supply cable
to a reasonable length for my desk, about 17". Now the voltage stays above
13v.

Thanks a lot for a lot of great information George and a really good
question Jon.

-James
NU3F


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