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Old 15-01-2022, 09:20   #46
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Join Date: Jan 2019
Location: Oceanside Ca
Boat: Lancer 27PS
Posts: 555
Re: Icom AT-140 tuner with M802 HF radio (SSB) stopped tuning

Originally Posted by Daurin View Post
Still haven't tracked down an SWR meter here. What low-tech test could you recommend to test transmission power?
I know I am coming to the party late and without horderves, but a low tech test is to purchase an fluorescent light bulb and tape it to the wire at the output of the tuner. If there is RF present, the bulb will light up. This method was used by hams in the old days to manually tune their radios: the brighter the light, the better the match. Now, they may have used something else, maybe Mercury Vapor bulbs, but fluorescent lights were available in late 1920s.

Just a thought.

Note: this will not work on coax, must be single wire like GTO-15 and at the output port of the tuner.
Brian D
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hf radio, icom, radio, ssb

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