Lot of 10 Crystal Diodes, Antique Large Glass, Vintage Germanium Radio DetectorĭOSTOV CR-1 CRYSTAL RADIO kristall cristal cristallo detector krystal cristalinĬrystal Radio Set AM MW with Crystal Earpiece Germanium Diode Variable CapacitorĨ00-1200 KHZ TUNABLE LOW POWER AM RADIO TRANSMITTER FOR YOUR VINTAGE RADIOSĪ 1.5 WATT TUNABLE AM MOSFET RADIO TRANSMITTER FOR 800-1200 KHZĭ18 'Holy Grail' 1987 Military Point Contact Germanium Diode ~ Rare BlueĪ 0. There is no ON/OFF switch nor power source required as this radio uses only the broadcast energy as its power source. The Heathkit CR-1 Sold over a period of about five years (1957 - 1962) This radio, like most, tuned the AM broadcast band from 540 KHz to 1600 KHzAfter hooking up an antenna and ground and a high impedance (2000Ω ?) headset to the re- spective binding posts, one would set the an- tenna switch to the area of the station they wanted to tune in (high, medium or low fre- quency) and tune for a signal with the DET tuning, adjusting the ANT tuning for the maximum signal and switching the ANT switch if the tuning control ran out of effectiveness. UNBUILT Heathkit CR-1 vintage AM crystal radio receiver reproduction DIY kit set for sale More pictures. The detector circuit is just a crystal di- ode (type currently unknown) and relies on the built-in capacitance of the headset to augment detection. New in open box manual detached from the box. The two tuning controls are 365 pF (μμf in those days) variable capacitors and the ANT switch (middle control) switches in additional 350 pF capacitors across the ANT tuning variable ca- pacitor. The three controls, left to right, are ANTenna tuning, ANTenna switch and DETector tuning.

The left set of binding posts are for the ANTenna and GrouND (ground) and the right set are for the PHONES.

The CR-1 has two sets of binding posts and three controls. Headphones are usdto reproduce the program material. Such a receivercontainscircuits capableof tuningor select ing thedesired radiosignal and a crystaldetector toextract theelectrical soundenergy fromthe radio signal. The case is bakelite with a gray-metal top plate that is the front panel. The Heathkit Crystal ReceivermodelCR-1is an improved versionof a type ofradio thatenjoyed popularityaround the early1920's. The Heath CR-1 measures 6' x 3' x 2' wide. It is double tuned and drives high impedance headphones.

Great condition no chips no scratches great collector item! Heathkit CR-1 Crystal Radio The CR-1 is a simple kit that uses a sealed crystal diode instead of a 'cats- whisker'.

Heathkit cr-1 crystal radio manual