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 inch x 6.5 inch 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.
The 1N34A Germanium diode is an old standby in electronics. Widely used for detecting the rectifying efficiency or for switching on a radio, TV or stereo etc.