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Espionage. The HF radio transmitter with the power supply 220 V

Espionage. The HF radio transmitter with the power supply 220 V

A radio transmitter works in a range 27 – 30 MHz. Distance of action 200 – 300 m. A power network 220 V is used as antenna (aerial). Radio transmitter is powered from a network 220 V through the condenser C8. Further the voltage is rectify on the diodes VD3 & VD4 and stabilized by a stabilizer diode VD2 (KC191). The coils L1 and L2 are winded by the wire ПЭВ 0.25 on a magnetic core. Diameter of core is 2.8 mm. The coil L1 - 14 coils, and the coil L2 – 3 coils, winded over coil L1. A choke Dr.1 with inductance 50 -100 mH. The condensers C8 and C9 must be counted on a voltage no less than 250 – 400 V. The elements of device are found under voltage 220 V.

Circuit of HF radio transmitter with the power supply 220 V

Literature: Magazine Радиохобби №3 1999.

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