Wireless Transmitter DIY Kit Now your antique radio can play some of the same programs it did when it was new! With your cassette tape player, phonograph or high output microphone, this one tube transmitter becomes a miniature AM broadcasting station. Patterned after the 1939 Zenith model S-7000 Wireless Record Player. Assemble on a 4 x 6 1/2" breadboard, all parts and instructions included. 2 lbs.