Radio & Antique Equipment Parts
High impedance crystal earphone - very sensitive and works great with crystal radios. Has 3 a foot cord and miniature (3.5 mm) plug.
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 board. All parts and instructions included.
Input - 120V, 60 Hz. "A" Output - Adjustable and regulated 1.5 to 7.5 volts 1.5 Amps "B" Output - 22, 45, 67, 90, and 135 volts regulated up to 50mA. "C" Output - Adjustable 0 to 22 volts. Regulated. Kit includes transformer, rectifiers, capacitors, resistors, transistors, I.C., regulator, white pine board, and all necessary hardware. Easy to follow instructions for assembly.
A semiconductor device which passes current in the forward direction(from anode to cathode), and blocks current in the opposite direction.