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#2
September 25th 03, 01:32 AM
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Michael Horowitz wrote:
I have an A-21 and headphone/mic adapter. The adapter has the male jacks at one end for the A-21,and female plugs for the headset and microphone at the other end. There is also a female 3mm plug which I believe would connect to a PTT switch. Playing around with a 3mm jack, I have found that I can make the A-21 transmit a carrier by grounding one of the jack connections, but I can not get audio to pass to the transmitter, so I'm thinking there is more to the PTT circuitry than I originally thought. Can someone please describe the circuitry of a PTT switch? - Mike This "may" help. http://members.rogers.com/2rawilliam...uild_a_ptt.htm ww 
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