Interfacing issues between Sigtronics intercom and TSO/ETSO panel mount radios

Existing Sigtronics Intercom (SPA-, SDB-, SCI, Sport-) installations that utilize both pilot and co-pilot transmit positions may display a transmit issue when fitted to a TSO/ETSO panel mount radio (such as the Icom IC-A220T). This could affect anyone upgrading to a TSO/ETSO 8.33 kHz compatible radio in order to comply with the new regulations.

If you do use an existing Sigtronics intercom, please refer to the mod sheet issued by Sigtronics to correct this issue.

15/06/2017