ICOM 7200 silent tx power loss. - ModsAndRepairs Forum at eHam.net

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eHam.net Forum : ModsAndRepairs : ICOM 7200 silent tx power loss.

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ICOM 7200 silent tx power loss.	Reply
by XXBAY1 on June 22, 2009	Mail this to a friend!
If rig's tx power is set to maximum it begans to fade after 2 minutes even without any actual tx, but it recovers after a dsp reset. What does it mean? Software fault?

RE: ICOM 7200 silent tx power loss.	Reply
by W3LK on June 22, 2009	Mail this to a friend!
If you are not actually transmitting, how do you know the output is dropping? How are you measuring the output? what mode(s) are you using? 73, Lon - W3LK Naugatuck, Connecticut

RE: ICOM 7200 silent tx power loss.	Reply
by XXBAY1 on June 24, 2009	Mail this to a friend!
ICOM 7200 only supports am/ssb. >If you are not actually transmitting, how do you know the output is dropping? I mean that TX power drops by time, whenever it's on or off. First I detected it by responses from my listeners, than tried to look what actually happens to it all the time and a simple test with an induction tester proved that the TX actually degrades.

RE: ICOM 7200 silent tx power loss.	Reply
by W3LK on June 24, 2009	Mail this to a friend!
I have no idea what an "induction tester" is. On air reports are generally worth what you pay for them. You need to check the power out with a calibrated watt meter/SWR bridge while transmitting with a dummy load attached to the output. The output meter/bridge goes between the ring and the dummy load. I see two possibilities: you have a bad antenna/feedline causing the SWR protection circuit in the rig to shut it down and you have an insufficient power supply. Tell me about your antenna system and your power supply. << ICOM 7200 only supports am/ssb.>> It also supports CW. 73, Lon - W3LK Naugatuck, Connecticut

RE: ICOM 7200 silent tx power loss.	Reply
by K7KBN on June 24, 2009	Mail this to a friend!
Tell us about the antenna, the "listeners", and your call sign. 73 Pat K7KBN

RE: ICOM 7200 silent tx power loss.	Reply
by XXBAY1 on November 2, 2009	Mail this to a friend!
Thank you very much, we got a faulty power supply, with a weird malfunction ... there were dead bugs in it. Still don't get what did it have with DSP.

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