Shakespeare makes a VHF SWR meter to test your antenna. About $120. Wow the price sure has gone up! Checks output power and has a tone generator to check the receiver too. Will not test for hum. You will also need a 3 ft coax jumper with PL-259's on each end.
BTW, is the hum still there on LOW POWER?
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Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May, NJ
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