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AM Receiver - 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
good. (schematic added 9/02) |
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AM Receiver for Aircraft Communications - (electronic circuit added 7/03) |
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AM-Receiver for Aircraft Communication 118.250MHz - (electronic circuit added
4/05) |
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Automicro RX3302 receiver module photo - ….(circuit design added 04/09) |
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Automicro RX3304 receiver module schematic - ….(design added 04/09) |
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BCB Receiver without Coils - The radio consists of two phase-shifting transistor
stages (T1 and T2) and a RF amplifier (T3). The gain of T1 is almost one (R4/R5).
Phase shift of this stage is 90 degrees at a frequency determined by P2 and C4. The
second stage (T2) is identical to the first; the frequency of 90 degrees phase shift
…(electroninc design added 04/05/06) |
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Designing an AM Receiver For Low Power Wireless Systems Using the NEC UPC2768GR IC
7/22/97 - Application Note California Eastern Laboratories Doc #921 (app
note added 6/06) |
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One-transistor Regenerative AM Receiver - A classic design revamped slightly.
Features a single-transistor regen stage, and a range of 1000 miles with a 4-foot
antenna. Perhaps the best "survival radio", yet. Now updated with speaker amplifier.
(circuit design added 7/06) |
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Shortwave Audion - It is a Hartley-ECO Audion, in which the plate is grounded for
RF. Positive feedback from cathode to grid occurs via the coil tap. The amount of
feedback is determined by the 100k pot; this controls the voltage at the screen grid
and thereby the transconductance of the valve (higher voltage resulting in greater
transconductance). …(schematic added 06/07/08) |
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ZN414 Portable AM Receiver - 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The ZN414 IC has now been replaced by the MK484 which is identical in performance and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. (added 10/05) |
