[TenTec] Audio Hum on Omni-VII

[Bill and Cindy]

I just got my new Omni-VII last week. It seems to be a great radio, the second radio in the
shack is an Omni-VI+, so I knew what to expect......
 
There is a hum on the audio. The Omni-VII is keyed from an old Compaq laptop running
N1MM software, through an Array Solutions SO2R switch box. The hum COMPLETELY
disappears when the AC/DC adapter power cord is pulled out of the laptop and the
computer is on battery power. I don't remember this happening with the Omni VI+....
 
Hmmm (no pun intended). Is this the AC/DC adapter going bad? The computer apparently
takes 18.5 V at 2.7 A based on the listed output of the AC/DC adapter. What if I just
power the laptop from the 13.8 V MFJ power strip that powers all the other accessories?
Will this work?
 
Thanks, Bill /  KO7AA in Tucson