Hello, As far I know Kenwood handy radios with APRS only TH-D7A/E and TH-D72A/E can work in duplex mode - after turn on this feature. 73, Armand SP3QFE W dniu 2020-03-15 15:12, Gerald Witalec via AMSAT-BB napisał(a): > JoAnne,I believe the TH-D74A is NOT duplex receive so how is that > working out for you contacting the SATS? > Jerry...W8RQM