jindoguy(at)gmail.com
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 Posted: Mon Jul 13, 2009 8:16 am Post subject: Icom A-22 headphone adapter |
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I finally had a chance to test the handheld on the trike yesterday. Using an ELT antenna in place of the rubber ducky, I can hear over 40 miles from 700 feet. Unfortunately I could not transmit at all. When the button is pushed the RX flag goes out and the TX flag flashes briefly and that's all that happens. This morning I disassembled the pushbutton and confirmed that both switches are working and connected to the two condition mini plug.- When I checked the connection from the socket into which the push to talk button connects I get no connection from either the point or the next ring to ground.
- When I plug in the push to talk the condition in 1 does not change.
- When I push the button I get a connection from the point of the plug to ground, the middle ring remains open.
If I understand correctly, when the radio is in receive mode the transmitter is grounded and when the button is pushed the receiver is grounded and the transmitter is opened. I should mention that I loaned this adapter to a fellow with an A-4 who couldn't get it to work either, but he didn't do any testing on it to try and diagnose the problem. Both of our radios work without the adapter.
Does anyone have info to verify if the pushbutton on the head phone adapter is working correctly so I can either get another if it's not or get the radio fixed if it is.
Thanks,
Rick Girard
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