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Category: RF Circuits / RF Receivers Views: 2274 Rank: 4 An AM portable radio receiver made from the ZN414 IC. The ZN414 ic has now been replaced by the MK484 which is identical in performance and pinout. visit page.
Related circuits Nice Crystal Radio with 1N34A Germanium Diode. Based on Valvo FD-1A module, TBA120, and MC1310. Operation of the receiver is based on the phase locked loop principle. The FD-1A contains an RF amplifier, oscillator and mixer (made with BF324, BF451 and BF324 transistors, respectively). Tuning is performed with four varicaps (BB104). There is... Add a signal-strength display to an FM-receiver IC The Philips (www.semiconductors.philips.com) TDA7000 integrates a monaural FM-radio receiver from the antenna connection to the audio output. External components include one tunable LC circuit for the local oscillator, a few capacitors, two resistors, and a potentiometer to control the... 4 Band Double Tuned Preselector Once again, this is a project designed by David Sayles. The input can be from a longwire or a loop antenna. The unit covers MW and Sw to 30MHz. Click here for a picture of David`s MW loop. Click here to view a finished picture of this project. Earphones, batteries are sold separately. AM / FM seems to be a common mold. But stamping is different. AM / FM E193577 UL94V0 board with the AM / FM etching printed circuit board manufacturers are the same. Shape is considered to be shared. (Design, sharing the production process design?). Radio... 42 Mc Band to 88 Mc Band (retrofit converter) Project Before World War II the FM radio band was just below 50 Mc. Read all about it. If you have such a radio, you might want to build this converter. It will let your old set receive the modern FM band (88 to 108 Mc.). This design is based on an article I wrote for Radio Age. You must wind L1... This converter uses a low-pass filter instead of the usual tuned circuit so the only tuning required is with the receiver. The dual-gate MOSFET and FET used in the mixer and oscillator aren"t critical. Any crystal having a frequency compatible with the receiver tuning range may be used. For... This is a very simple crystal reciever circuit for short wave band and can be used with headphones. Soviet Superheterodyne Selga 402
Tronics in Ten - AGC Circuit for BC-1 Radio Part II
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