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On Feb 28, 9:11 pm, James Barrett wrote:
Hi, I have put up a dipole and I admit it is not a very good one, about 20 feet up, approx 60 ft. It works great as a receiving antenna and I'm having fun listening, but so far no one can hear me. I have an Icom IC-735, and using SSB, the watt meter on the radio shows full power as I talk, but the watt meter on the tuner barely moves. In CW mode both meters go all the way. Is this a typical symptom of a poor quality antenna or does it indicate some other problem (besides my antenna making skills)? Any advice is appreciated. Thanks, Jim Dunno. Seems a bit strange if no one can hear you. It sounds like you are using an average reading meter, vs a peak reading meter. In the case of an average meter, on SSB voice peaks you will usually see about 1/3 of your actual output. IE: with a 100w radio, I'd expect peaks of appx 35w on the meter. Barely moving seems to be a problem. Being as the rig seems to be doing full power in CW mode, I doubt the antenna is the problem. As long as the SWR is under 2:1 you should be doing full output. It can probably actually be a bit worse, and still do full power in many cases. So that makes me wonder if you might have a mic drive problem, etc.. What mike are you using? Most older icoms require a mic preamp. If not, you won't get full drive. And I think the 735 is one that requires the mic preamp. Even my 706 requires a preamp if I'm not using a stock mic. If not, I won't get full drive. Try the stock hand mike, if you are using something else, and see what happens. Average meters will usually read only about 1/3 of actual output, but barely moving the meter is not right, if CW if reading correctly. You should see peaks of 25-35 watts if it's working right. Near full power peaks if using an actual peak reading meter. Most passive "capacitor" meter hang circuits only read about 80% of full power. MK |
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