This is a simple RF receiver mainly for low-distance digital radio receiver application. The analog output of this circuit should be connected to a schmitt-trigger signal conditioning circuit with a proper value capacitor (from collector of T3). L1 f

Description: An FM regenereative receiver using a single FET and one audio amplifier IC.

This is an UHF FM BUG with ButtonCell battery.This bug is 100% made from an old Nokia GSM phone! It operates at 434 MHz and reception can be achieved on a modified TV tuner or 70cm band HAM radio.

You can build this FM receiver with just one MPF102 FET Transistor and a few of electronic components.This radio is sensitive enough to tune 20 stations across the FM band, some with volume high enough to drive a small PM speaker. The ability to tune

Ba Lun is the English transliteration that balances converter, the principle is to press aerial theory, occasionally extremely aerial belongs to balance antenna, and coaxial cable is belonged to lopsided transmit now, if join its directly, of coaxial

Description: This is a compact three transistor, regenerative receiver with fixed feedback. It is similar in principle to the ZN414 radio IC which is now replaced by the MK484. The design is simple and sensitivity and selectivity of the receiver are

In 1800, pre-history End of the 19th century for the rapid development of commercial radio and the establishment of amateur radio provides a basis for the stage, where there are a large number of contributors to the early radio technology, such as th

The PL-550 is manufactured by Tecsun. It is not available at retail in the U.S. and nearly all of the markings on the radio are in Chinese. The Tecsun is somewhat reminiscent of the old Sangean 803A, albeit much smaller physically. My evaluation unit