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  • What is the difference between db and dbm ?

    You are in the right place, this article will tell you what is db and dbm and what difference between them.You will find everything you want to know about dband dbm.----- FMUSER DB is a pure count of unit: dB = 10logX. In fact, the significance of

    Posted at 10-03-11 by Admin views(66179)

  • A one transistor super-regenerative FM receiver

    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

    Posted at 08-08-09 by Admin views(9462)

  • Ba Lun reachs broadcasting station

    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

    Posted at 08-08-09 by Admin views(850)

  • The development of radio history

    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

    Posted at 08-11-25 by Admin views(3298)

  • AM Receiver circuit

    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

    Posted at 08-11-30 by Admin views(12276)

  • How to Make Amplitude AM Modulator Circuit ?

    Description: This circuit uses two signal generators to simulate an Amplitude Modulated RF carrier wave. The output can be used to simulate the response of LC and tank circuits. Notes: Two signal generators are used in this circuit, one representing

    Posted at 08-11-30 by Admin views(16836)

  • FM Receiver using a single FET and one audio amplifier IC

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

    Posted at 08-11-30 by Admin views(3941)

  • Test of TECSUN PL-550 PLL radio

    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

    Posted at 08-12-07 by Admin views(10927)

  • TECSUN PL-550 english user guide

    Posted at 08-12-07 by Admin views(4661)

  • UHF FM BUG

    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.

    Posted at 08-08-09 by Admin views(1591)

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