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Electronics Schematics - R

1 Transistor FM Receiver: 

136 kHz Direct Conversion Receiver: 

2 Transistor Audio Amplifier: 

30m Direct Conversion Receiver: 

4 Band Double Tuned Preselector: 

4.5 10Mhz Superheterodyne RCVR: 

40m Direct Conversion Receiver: 

42 Mc Band to 88 Mc Band (retrofit Converter) Project: 

49MHz Walkie Talkie: 

50 MHz to 146 MHz Converter: 

80 Meter CW ARDF Receiver: 

80M ARDF Direction Finder: 

80m Direct Conversion Receiver: 

80m Direct Conversion Receiver: 

AM Broadcast Band Active Antenna: 

AM Broadcast Band Regenerative Receiver: 

AM Radio: 

AM Radio Preamplifier: 

AM Radio Preamplifier: 

AM Receiver: 

Bipolar Regenerative Receiver: 

Build your own Super heterodyne Receiver:  08/01/96 EDN-Design Ideas

Car Radio tunes the Amateur Bands: 

Compact L Match ATU for Portable use: 

Crystal Radio #2:  RF Receivers & Receiver Circuits Crystal Radio

Crystal Radio 3: 

Crystal Set that Requires No Antenna: 

Crystal-Controlled Time-Base Generator: 

CW Receiver 40 / 80 Meter CW Receiver: 

CW zero Beat indicator: 

Economy Short Wave Radio: 

Four Band Double Tuned Preselector: 

One Transistor FM Receiver: 

One Transistor Regenerative Receiver: 

OpAmp Radio: 

Phase Shift Radio Direction Finder: 

Popcorn Direct Conversion Receiver: 

Q  Multiplying Loop Antenna: 

Receiver Building Blocks: 

RF Front End for Triple Conversion GPS Receiver: 

RX3302 Receiver Module Schematic: 

Several Receiver Circuits: 

Short wave radio : 

Simple Circuit Detects Current Pulses:  01/06/94 EDN-Design Ideas / The pulse detector provides a visible indication of positive and negative current pulses. The pulses amplitudes can vary from20 to150 mA. The pulses durations can range from10 to40 msec, and their repetition rate can span40 to180 pulses/minute.
 

Single Chip Builds Tiny Aircraft Receiver:  09/25/97 EDN-Design Ideas

SOP Direct Conversion Receiver: 

SOP Receiver: 

Super 80 ultra Simple SSB Receiver for 3.5 MHz: 

Superhet Receiver:  This idea presents a simple circuit for a superhet radio receiver that can be built up in sections, with each section tested before assembly. The receiver circuitry as presented here can be built for less than $50.

Super regenerative 27MHz Receiver: 

Super regenerative 27MHz Receiver: 

Supreg 27Mhz Receiver: 

SW Receiver using the ZN415: 

SWatt RF Preamplifier: 

Synthesized HF Receiver: 

Talking Receiver: 

TBA120 Narrowband FM Receiver: 

TDA7000 Receiver: 

The MRX 40 Mini Receiver: 

Toroidal Coil RF Shortwave Receiver: 

Two Band Radio: 

Two Transistor Audio Amplifier: 

ZN414 AM Receiver: 

ZN414 Receivers:

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