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RF Power Issue with my Icom FR3000

jm32935

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I have the 50watt version of the VHF Icom FR3000 repeater and noticed I am only putting out 18watts on my RF meter instead of the 50 its designed for at the antenna. I have about 75 feet of coax with N Connectors.

I have the H for Hi power indicator on the screen while the repeater is on.

I took a peek at the adjustment menu and channel A01 shows an LW setting.

I just want to make sure it is set at 50 watts and without needing a PHD to use the adjustment menu.

Any advice, thanks.
 

mmckenna

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Do you have an internal duplexer, or are you using an external duplexer?

Is your watt meter connected directly to the antenna output port and then to a 50Ω load?
 

jm32935

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Internal Duplexer.
The RF meter was hooked up at the antenna and when I keyed up the repeater it read about 18 watts.
 

mmckenna

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You will lose power going through the duplexer. If you are doing an alignment, you'd need to open up the radio and tie into the TX output off the RF module.

Losses through the duplexer will vary, and the small internal duplexers tend to be the worst of the bunch. Losing 2dB or so would not be unheard of.

Also, best to test into a known/good 50Ω dummy load.
 
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