Check the listing for details. MFJ TNC 2 Packet Radio MFJ-1270B Tested Working. Condition: Used, Made in United States. Listed at 45.00 USD. The MFJ TNC 2 Packet Radio MFJ-1270B is a reliable communication device that operates on the packet radio system. Made by the brand MFJ in the United States, this equipment is compatible with other MFJ products and is ideal for ham and amateur radio enthusiasts looking to enhance their communication capabilities. With its tested working status, this packet radio offers a dependable connection for users seeking to expand their radio communication systems.