Radio circuit
Simple version. Full version location at http://circuitsradio.com
View original of this circuit: http://circuitsradio.com/schematics/electrical-engineering/Radio/index.html
10.7MHz FM detector
10W HF linear amplifier
136 kHz direct conversion receiver
14MHz SSB 10mW Transceiver
175KHz inductive pulse receiver (PDF)
2 Transistor FM Transmitter
2 Transistor Transmitter
2-transistor FM transmitter
200-400 MHz voltage controlled oscillator
222 MHz Transverter
24 Hour Timer
2M - 20M transverter
2MHz RF Oscillator
2N2222 40 Meter CW/DSB Transceiver
3 Watt FM Transmitter
30m direct conversion receiver
30M PSK31 Transceiver
3W FM Transmitter
3W HF QRP linear amplifier
4 Band Double Tuned Preselector
4 Band Double Tuned Preselector
4 Transistor Transmitter
4 Transistor Transmitter
40-Metre Direct Conversion Receiver
40m direct conversion receiver
42 Mc Band to 88 Mc Band (retrofit converter) Project
49MHz walkie-talkie
4W FM transmitter
5 BANDS SLOPER
5 watt, 80 meter QRP CW Transceiver
50 MHz to 146 MHz Converter
50-150MHz Overtone Oscillator
500mW HF linear amplifier
500W HF linear amplifier
50MHz Assistant (Preamp & Power Amp.)
50MHz Converter
56K RF Modem
7MHz CW/AM QRP transmitter
80 Meter CW ARDF receiver
80M ARDF direction finder
80m Direct Conversion Receiver
80m direct conversion receiver
A compact L-match ATU for portable use
A Low Power RF ID Transponder (article RF Design magazine)
A sensitive crystal diode checker of field-strenght meter using an af transistor as dc amplifier
A thermistor bridge
Active 2nd Order Filters
Active 2nd Order Filters
Active Antenna
Active antenna with gain
Advanced VHF power meter
Aircraft Receiver. A passive receiver for listening to the pilot!
Alinco radiostation DJ-160 1.1m
Alinco radiostation DJ-180 428kb
Alinco radiostation DJ-182 389kb
Alinco radiostation DJ-191 629kb
Alinco radiostation DJ-191 DjVu-179kb
Alinco radiostation DJ-195 DjVu-75kb
Alinco radiostation DJ-195- 237Kb
Alinco radiostation DJ-580 - DjVu-181kb
Alinco radiostation DJ-580 2.3mb
Alinco radiostation DJ-F1 - 377kb
Alinco radiostation DJ-F1 - DjVu-157kb
Alinco radiostation DJ-G1 414kb
Alinco radiostation DJ-G5 3.1m
Alinco radiostation DJ-S11 400kb
Alinco radiostation DJ-S11 DjVu-142kb
Alinco radiostation DJ-S4- DjVu-176kb
Alinco radiostation DJ-S41- 464kb
Alinco radiostation DR-130 - 302kb
Alinco radiostation DR-140 - 542kb
Alinco radiostation DR-140 - DjVu-182kb
Alinco radiostation DR-599 2.9m
Alinco radiostation DR-605 1.2m
Alinco radiostation DX-701 - 2.9m
AM BCB radio receiver
AM Broadcast Band Active Antenna
AM Broadcast Band Regenerative Receiver
AM Radio
AM Radio
AM Receiver
AM receiver for aircraft communications
AM Transmitter Circuit
AM-Receiver for Aircraft communication (118.250MHz)
AM/FM/SW active antenna
An Adjustable 4/9:1 - 9:1 Impedance Transformer
An end-fed antenna, L-match coupler and resistive bridge for HF
Antennas! Here are a few notes regarding receiver antennas for AM, shortwave, and scanner frequencies.
Assorted RF circuits
ATL3 Loop Antenna
Baluns and coaxial aerials. If you are dealing with radiofrequency aerials you might like to experiment with the configurations proposed. (simple)
Band 2 VHF Amplifier
Bartletts Bisection Theorem. Modify passive filters for unequal terminations. (Theory)
Basic RDS Encoder Unit
Basic RF oscillator
Baycom Terminal Diagram (modem)
Block diagram for PLL synthesizer
Bootstrapped PLL Improves Oscillator Performance (33k)
Bug detector
Bug detector
Build a Yagi-Uda Antenna
Build your own VLF Receiver
Building a Simple LF Exciter
Car radio tunes the Amateur Bands
Circuit diagram of the meter swithing for a mounted reflectometer
Circuit diagram of the noise bridge
Circuit of coupler unit
Circuit of in-line rms/p.e.p. wattmeter
Circuit of rf impedance bridge
Class B series modulator
CMOS RF PLL sythesizer
Compact 20 14 MHz direct conversion receiver
Computerised Morse code generator/transmitter
Constant Reactance Voltage (article RF Design magazine)
Convert 2m VHF FM PMR transceiver Motorola Radius M110 into an amateur radio
CP-50. Clone Schematics - DjVu - 19kb
CP-50. Programming Instructions. DjVu - 228kb.
Crystal radio
Crystal radio
Crystal radio
Crystal radio
Crystal Radio
Crystal Radio Amplifier (16k) An unusual amplifier that gives room-filling volume with a few parts.
Crystal radio circuits including diode performance comparison
Crystal radio with amplifier
Crystal set that requires no antenna
Curious C-Beeper
CW RECEIVER
CW zero beat indicator (PDF)
CXA1191S
Demodulator Schematic/Design
Digital Automatic Gain Control (AGC)
Direction finder system
DJ-182 - 1.1mb.
DSBSC (Double Side Band Supressed Carrier)
Economoy short-wave radio
Economy short-wave radio
Electronic Attenuator
EXTERNAL TRACKING GENERATOR from 100kHz to 1000MHz (sweep analyzer)
Field Strength Meter
FM Band Monaural Transmitter. Varactor diode gives high quality modulation.
FM Band Preamplifier. This low noise amplifier will bring in those low-power stations.
FM Beacon Transmitter (88-108 MHz)
FM Bug
FM bug
FM Oscillator
Fm radio
FM Receiver using MPF102
FM stereo decoder
FM Stereo Demodulator with MC1310P [ 3]
Fm Transmit
FM Transmiter 4W
FM Transmitter
FM Transmitter
FM transmitter
FM Transmitter
FM Transmitter
FM Transmitter For Channel Changer
Four channel RF remote control
Four Channel Wireless Transmitter and Receiver
Frequency Synthesizer
Generic VHF power amplifier
GP-68. Service Manual. DjVu, 278kb.
Ham Band VFO
HammComm 3.0 (Comparator) Receive Circuit also for use with JVFAX and PKTMON- WB5NBQ
HANDY TELEPHONE RECEIVER
Harmonic oscillator
Hear Amateurs on your FM Radio!
Hear Amateurs on your Shortwave Radio!
HF Signal generator
High-gain field-strength meter by WA4DXP
How to Build a 300MHz AM, RF Remote Control System
HX-240. Programming Instructions. BMP - 456kb
HX-240. Programming Instructions. DjVu - 91kb
HX-242. Programming Instructions. DjVu - 1mb.
IC-706mk2G. Service menu - 35kb
IC-V68. Programming Instructions. BMP - 1mb.
Icom radiostation 466kb
Icom radiostation IC-229 - DjVu-171kb
Icom radiostation IC-2SAT - 393kb
Icom radiostation IC-2SAT - DjVu-128kb
Icom radiostation IC-706 2.2m
Icom radiostation IC-756 2.3m
Icom radiostation IC-V68 - 445kb
Icom radiostation IC-V68 - DjVu-157kb
Icom radiostation ICF3/F4 1.8m
Improved CMOS RF PLL sythesizer
Improved FM Stereo Modulator
Introduction to Gilbert cells (a cross-coupled differential amplifier)
Introduction to Mixers (RF)
K7SZLS BASIC+ HAMCOMM Interface
Kenwood radiostation TH-22 - 512kb
Kenwood radiostation TH-22 - DjVu-163kb
Kenwood radiostation TM-251 - 447kb
Kenwood radiostation TM-251 - DjVu-152kb
Kenwood radiostation TM-733 - 725kb
Kenwood radiostation TM-733 - DjVu-258kb
Kenwood radiostation TS-870 (1) 1.6mb
Kenwood radiostation TS-870 (1) DjVu-380kb
Kenwood radiostation TS-870 (2) 2.2mb
Kenwood radiostation TS-870 (2) DjVu-583kb
Kenwood radiostation TS-870 (3) 2.2mb
Kenwood radiostation TS-870 (3) DjVu-568kb
Kenwood radiostation TS-870 (4) 1.9mb
Kenwood radiostation TS-870 (5) 0.7mb
Kenwood radiostation TS-870 (5) DjVu-148kb
L-Band PHEMT LNA for GPS, Inmarsat etc
LF to HF Converter
Linearized RF detector
Long Loopstick AM Radio Antenna
Low Frequency (article RF Design magazine)
Mains frequency meter (simple)
Measurement results for RF oscillator 1000-1500 MHz
Measuring RF Voltages with a VOM
Method of application of rf to the bridge
Method of measuring p.e.p output in relation to mean output with two-tone source
Method of using thermal converter for higher powers
Micro Power AM Broadcast Transmitter
Micro Power FM Broadcasting Circuits
Micropower AM band radio station. This simple transmitter offers surprisingly good signal quality.
Modified Howland Current Source. A Constant Current Source for a Grounded Load using a Single Op-Amp. (Theory)
Morse Adaptor for your VHF/UHF FM rig
Morse Code Beacon Keyer
Motorola radiostation CP-50 (pcb) DjVu-288kb
Motorola radiostation CP-50 (sch) DjVu-48kb
Motorola radiostation CP-50 (UHF) (sch) DjVu-47kb
Motorola radiostation GM-300 - 474kb
Motorola radiostation GM-300 - DjVu-148kb
Motorola radiostation GM-350 (pcb) - 886kb
Motorola radiostation GM-350 (pcb) - DjVu-145kb
Motorola radiostation GM-350 sch - 872kb
Motorola radiostation GM-350 sch - DjVu-218kb
Motorola radiostation GP-300 - 395kb
Motorola radiostation GP-300 - DjVu-111kb
MW Preamplifier
MW Preamplifier
N-888. BMP - 872kb
N-888. Programming Instructions. BMP- 663kb.
New Oscillators Reach for (article RF Design magazine)
New Topology Multiplier (article RF Design magazine)
Noise bridge measuring both R and X
One transistor FM receiver
One transistor regenerative receiver
One Watt 2.45 GHz Linear Amplifier
One Watt Class-C Amplifier
Op Amp Radio
Op-Amp Basics
Op-Amp Radio
Phased lock loop schematic
Phasing SSB exciter
Player FIRST
PLL FM transmitter
PLL Stereo Decoder with LM1800 [4]
PLL synthesizer-1
PLL synthesizer-2
PLL synthesizing oscillator (1)
PLL synthesizing oscillator (2)
PLL synthesizing oscillator (3)
Popcorn direct conversion receiver
Q- Multiplying Loop Antenna
Q-multiplier
Q-Multiplying Loop Antenna
Quad-Detector. Varactor diode provides temperature stability for FM quadrature demodulator.
Radio Cassete Recorder FIRST ¹556
Radio Control Electric Switch
Radio Control Interface
Radiostation ALINCO DJ-S41(300Kb)
RC Notch Filter (Twin T)
Receiver
Receiver building blocks
Regenerative shortwave receiver
RF actuated CW monitor
RF amplifier Wide Band -40MHZ
rf Circuits
RF detector for 0.001 MHz-1500 MHz
RF Directional Couplers. The design and analysis of wirewound toroidal directional couplers.
RF divider by 10 with K193IE2
RF divider by 10/11 with SP8695
RF divider by 4 with K193IE7
RF divider by 64/128/256 with MB506
RF divider by 64/128/256 with NEC506
RF front-end for triple conversion GPS receiver
RF Isolator Uses Differential Amplifiers
RF Modem Robotics Project
RF oscillator for 1.2 GHz-2.4 GHz
RF oscillator for 1000-1500 MHz
RF oscillator for 1420-2250 MHz
RF oscillator for 144-146 MHz with FM-1
RF oscillator for 144-146 MHz with FM-2
RF oscillator for 15-25 MHz
RF oscillator for 350-1000 MHz
RF Sniffer <.5 to -500 MHz
RF Sniffer <.5 to -500 MHz
RTTY terminal unit
Rush Converter for the Car. Tune in WRNO at 15.42 MHz and hear a famous talk show!
RX3302 receiver module schematic
SDSL Chip Set. xDSL- chip sets
Short Wave AM Transmitter
Short-wave scanner converter
Shortwave conveter for scanners
Simple AM Radio Receiver & Amplifier
Simple Field Strength Meter
Simple Op-Amp Radio
Simple Op-Amp Radio
Simple wireless radio data link
Slinky Beverage
Small Radio Transmitter
Smooth Tone Clickless CW Sidetone Generator
SOP direct conversion receiver
SOP receiver (PDF)
Sound Card Interfacing for RTTY, PSK31, and SSTV
SQUARE WAVE TO TRIANGLE WAVE CONVERTER. This circuit converts a square waveform to a triangle waveform while automatically maintaining a constant triangle amplitude for a wide range of input frequencies. Although originally designed for application in a communications system, the idea is readily adaptable for certain electronic music applications where waveform conversion is desired.
SSTV modems
Standard radiostation HX-240 - 615kb
Standard radiostation HX-240 - DjVu-186kb
Stereo Receiver 22AH777 part 1
Stereo Receiver 22AH777 part 2
Stereo Receiver 22AH777 part 3
Stereo Receiver 22AH777 part 4
Stereo Receiver 22AH777 part 5
Stereo Receiver 22AH777 part 6
Suitable two-lamp comparator
Super 80 ultra-simple SSB receiver for 3.5 MHz
Superregenerative 27MHz receiver
Supreg 27Mhz receiver. Superregenerative receiver. This is a simple RF receiver mainly for low-distance digital radio receiver application.
Surveillance Transmitter Detector
SW Receiver using the ZN414
SWR - Meter
Synthesized HF receiver
Talking receiver
TBA120 narrowband FM receiver
TDA7000 receiver
Test generator for 144 MHz with FM
The 180 Degree Hybrid Junction (180 RF Hybrid) (Tutorial)
The magic-T and its applications (an alternative to the 6 dB power splitter)
The MRX-40 Mini Receiver
Toroidal coil RF shortwave receiver
Transmiter Detector
TRF AM Receiver circuit
TS-870. Manual - 4.3Mb.
TV/Radio antenna wire isolator
Two band radio
Two-band radio
UHF - 100W Transistorized amplifier
UHF oscillator
UHF Preamplier
Ultra low frequency receiver. The frequency covered is from 0.1Hz to 10Hz and useful signals are received up to 16Hz. (simple)
Underground Radio - How to use conductive soil (underground water table) to transmit audio or radio signals. During World War II there were situations were conventional radio was useless, either because enemy jamming or just for hidding purpouses; thus, radio operators forced off the air, tried a different aproach... underground radio. Although its obviously a less efficient system, it works perfectly well if we find a good conductive sheet beneath.
Using mixers in radio communications. (The Linear Diode Detector for AM Demodulation/ The Product Detector for SSB, DSB, and CW Demodulation/ The Quadrature Demodulator/ Costas Loop for Demodulating a BPSK Signal/ Costas Loop for Demodulating a QPSK Signal/ The Filter Method of SSB Generation/ The Phasing Method of SSB Generation/ The Weaver Method of SSB Generation
Variety of receiver converter projects
VFO from 2001 ARRL Handbook, page 14.20
VFO from 2001 ARRL Handbook, page 17.74
Vibrating pocket bug detector
VLF radio receiver schematic
Windscreenloop aerial. If you do not like the whip antenna on your car, you may try this alternative circuit. (simple)
Wireless IR hphone transmitter
WLW 500KW Transmitter Schematic
WWV Converter for the Car. Receive WWV at 10 MHz and other shortwave broadcasts as you drive.
Yaesu , Vertex radiostation DjVu-197kb
Yaesu , Vertex radiostation FC-800 - 129kb
Yaesu , Vertex radiostation FC-800 - DjVu-52kb
Yaesu , Vertex radiostation FT-10R - 632Kb
Yaesu , Vertex radiostation FT-11R - 271Kb
Yaesu , Vertex radiostation FT-11R -DjVu-123kb
Yaesu , Vertex radiostation FT-2500 - 370Kb
Yaesu , Vertex radiostation FT-2500 - DjVu-147kb
Yaesu , Vertex radiostation FT-26 - 298Kb
Yaesu , Vertex radiostation FT-40 - 115kb
Yaesu , Vertex radiostation FT-40 - DjVu-48kb
Yaesu , Vertex radiostation FT-50 1.1m
Yaesu , Vertex radiostation FT-51 2.4m
Yaesu , Vertex radiostation FT-5100 2.2mb
Yaesu , Vertex radiostation FT-840 - 2.1mb
Yaesu , Vertex radiostation FT-8500 - DjVu-695kb
Yaesu , Vertex radiostation FT-8500 2.1mb
Yaesu , Vertex radiostation VX-10 - 385kb
Yaesu , Vertex radiostation VX-10 - DjVu-138kb
Yaesu , Vertex radiostation VX-1R - 1.8mb
Yaesu , Vertex radiostation VX-1R - DjVu-404kb
Yaesu , Vertex radiostation VX-300 - 437kb
Yaesu , Vertex radiostation VX-300 -DjVu-163kb
Yaesu band decoder schematic
Yaesu FT-736R doppler compensation
ZN414 Portable AM Receiver
ZN414 Portable AM Receiver
ZN414 receivers
ZN414 SW Receiver
View original of this circuit: http://circuitsradio.com/schematics/electrical-engineering/Radio/index.html