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AM Receiver Circuits / Schematics

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.

AM Receiver for Aircraft Communications

AM-Receiver for Aircraft Communication 118.250MHz

Automicro RX3302 receiver module photo

Automicro RX3304 receiver module schematic

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

Designing an AM Receiver For Low Power Wireless Systems Using the NEC UPC2768GR IC 7/22/97 - Application Note California Eastern Laboratories Doc #921

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.

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 trans conductance).

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 The ZN414 IC has now been replaced by the MK484 which is identical in performance and pinout.

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