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51SL Little Transmit Power

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slackcc

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Hi all,

I'm testing out an EF Johnson 51SL (4.14.5 firmware) and when I'm testing on the various frequencies in PC Tune I get up to the TX power tests and everything seems to tune up fine but the TX power displaying on my service analyzer doesn't even register in watts, it indicates around 800mV output. If I swap out with a known good HT-1000 on the same freq I see the expected 5W output, so assuming something is wrong with the 51SL. If I transmit into an antenna on the 51SL I can hear on a radio next to it, but cannot raise any local repeaters so I'm guessing there is very limited RF output at the moment.

Changing the sliders in PC Tune has little to no effect, save if I slide a slider all the way to 0 the power meter does drop from the 800mV output to 0.

I am guessing that the TX section of the RF board is dead here, but this is the first time I've really worked with an EF Johnson radio so I just wanted to check to see if there might be some known issue or some trick I might be missing that might explain what I'm seeing.

Any suggestions would be appreciated.

Thanks,

Chris
 
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