I have for sale a PacComm TNC DFM Modem and Psk-1 and switch box. The switch box is presently setup for a Yaesu 736 transceiver. The unit is being offered here, If not sold will list on E-Bay. contact me of list for any further information at ve4gtb at mts.net 73 Gerry VE4GTB Amsat #29196 Area Coordinator Winnipeg, Manitoba Canada www.ve4gtb.com