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Electronics Schematics - R

(RF) Radio Frequency Receivers Circuits

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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