Sbírka schémat VF obvodů

• UHF oscillator
  
• Economoy short-wave radio
  
• Linearized RF detector
  
• Two-band radio
  
• Shortwave conveter for scanners
  
• FM Bug
  
• AM Radio
  
• Toroidal coil RF shortwave receiver
  
• Crystal radio
  
• CW RECEIVER 40/80 meter CW receiver
  
• TRF AM Receiver circuit
  
• WLW 500KW Transmitter Schematic
  
• AM-Receiver for Aircraft communication (118.250MHz)
  
• AM receiver for aircraft communications
  
• 45-860MHz Radio receiver based on UV916-tuner
  
• 80 Meter CW ARDF receiver
  
• Four channel RF remote control
  
• Build your own VLF Receiver
  
• Receiver building blocks
  
• Simple wireless radio data link
  
• RX3302 receiver module schematic
  
• Superregenerative 27MHz receiver
  
• 49MHz walkie-talkie
  
• Convert 2m VHF FM PMR transceiver Motorola Radius M110 into an amateur radio
  
• Vibrating pocket bug detector
  
• 2MHz RF Oscillator
  
• 50-150MHz Overtone Oscillator
  
• Simple Op-Amp Radio
  
• UHF - 100W Transistorized amplifier
  
• 50MHz Converter
  
• RF front-end for triple conversion GPS receiver
  
• 2M - 20M transverter
  
• Improved CMOS RF PLL sythesizer
  
• Harmonic oscillator
  
• Direction finder system
  
• One transistor regenerative receiver
  
• Synthesized HF receiver
  
• TBA120 narrowband FM receiver
  
• TDA7000 receiver
  
• ZN414 receivers
  
• 10W HF linear amplifier
  
• 500W HF linear amplifier
  
• 3W HF QRP linear amplifier
  
• Phasing SSB exciter
  
• 500mW HF linear amplifier
  
• Generic VHF power amplifier
  
• 10.7MHz FM detector
  
• RTTY terminal unit
  
• Q-multiplier
  
• CMOS RF PLL sythesizer
  
• 3W FM Transmitter
  
• Crystal radio
  
• Op-Amp Radio
  
• Class B series modulator
  
• Advanced VHF power meter
  
• The MRX-40 Mini Receiver
  
• External antenna for the GPS-38, Magellan 2000, or Eagle Explorer GPS receivers
  
• AM Broadcast Band Active Antenna
  
• Active antenna with gain
  
• Ham Band VFO
  
• HF Signal generator
  
• Simple AM Radio Receiver & Amplifier
  
• Bug detector
  
• 175KHz inductive pulse receiver (PDF)
  
• 200-400 MHz voltage controlled oscillator
  
• AM/FM/SW active antenna
  
• RF Sniffer <.5 to >500 MHz
  
• Demodulator Schematic/Design
  
• 73MHz remote controller hallogen light
  
• CB (27MHz citizens band) receiver
  
• CB (27MHz citizens band) 2.5W transmitter
  
• AM to FM conveter
  
• AM BCB radio receiver
  
• Regenerative shortwave receiver
  
• 7MHz SSB Transceiver
  
• DSBSC (Double Side Band Supressed Carrier)
  
• Frequency Synthesizer
  
• Digital Automatic Gain Control (AGC)
  
• Four Channel Wireless Transmitter and Receiver
  
• PLL synthesizing oscillator (1)
  
• PLL synthesizing oscillator (2)
  
• PLL synthesizing oscillator (3)
  
• 2N2222 40 Meter CW/DSB Transceiver
  
• Yaesu FT-736R doppler compensation
  
• Phased lock loop schematic
  
• 30M PSK31 Transceiver
  
• SOP receiver (PDF)
  
• SOP direct conversion receiver
  
• Receiver
  
• 30m direct conversion receiver
  
• Popcorn direct conversion receiver
  
• 40m direct conversion receiver
  
• 80m direct conversion receiver
  
• Huge LED Antenna Direction Display (part 1)
  
• Huge LED Antenna Direction Display (part 2)
  
• 136 kHz direct conversion receiver
  
• One Watt 2.45 GHz Linear Amplifier
  
• 222 MHz Transverter
  
• VFO from 2001 ARRL Handbook, page 17.74
  
• VFO from 2001 ARRL Handbook, page 14.20
  
• Assorted RF circuits
  
• 14MHz SSB 10mW Transceiver
  
• Building a Simple LF Exciter
  
• Yaesu band decoder schematic
  
• VLF radio receiver schematic
  
• 5 watt, 80 meter QRP CW Transceiver
  
• How to Build a 300MHz AM, RF Remote Control System
  
• RF Modem Robotics Project
  
• PLL FM transmitter
  
• ICOM CI-V interface with RS232 RTS to PTT
  
• Improved FM Stereo Modulator
  
• Smooth Tone Clickless CW Sidetone Generator
  
• Variety of receiver converter projects
  
• One transistor FM receiver
  
• 42 Mc Band to 88 Mc Band (retrofit converter) Project
  
• Crystal radio circuits including diode performance comparison
  
• 50MHz Assistant (Preamp & Power Amp.)
  
• Bug detector
  
• Basic RF oscillator
  
• Radio Control Electric Switch
  
• 56K RF Modem
  
• 80M ARDF direction finder

VYSÍLAČE:

• Li'l 7 AM Transmitter Schematic
  
• Wireless microphone
  
• XTAL locked tone transmitter
  
• AM oscillator for wireless microphones
  
• Wireless microphone
  
• 1W CW Transmitter
  
• 433MHz transmitter using SAW resonator
  
• A 3m (100 MHz) small bug
  
• Basic FM Transmitter
  
• Micro Power AM Broadcast Transmitter
  
• FM Beacon Transmitter (88-108 MHz)
  
• 1 valve CW transmitter
  
• 250mW HF CW transmitter
  
• 2 valve CW transmitter
  
• Transmitter using LM317
  
• 5 Watt HF CW transmitter
  
• Simple FM microphone
  
• FM bug
  
• High power FM bug
  
• 27MHz AM/CW transmitter
  
• Easy 2-meter transmitter
  
• QRP HF transmitter
  
• Spark gap transmitter
  
• QRP SSB transmitter
  
• Crystal controlled FM transmitter
  
• 150mW FM transmitter
  
• FM transmitter
  
• Simple Low FER Transmitter
  
• 7Mhz AM/CW Amateur Radio Transmitter
  
• VHF FM transmitter
  
• Simple FM transmitter
  
• Wireless microphone
  
• Shortwave radio transmitter
  
• 175KHz inductive pulse transmitter (PDF)
  
• 7MHz QRP transmitter
  
• Small Radio Transmitter
  
• FM Telephone Transmitter
  
• 4 watt FM transmitter
  
• FM transmitter bug
  
• Small radio transmitter
  
• AM transmitter
  
• 2 Transistor FM Voice Transmitter
  
• 15 watt FM transmitter
  
• 4 watt FM transmitter
  
• Tiny FM transmitter using SMD (surface mount devices)
  
• Medium range transmitter circuit
  
• AM FM Simultaneous Transmitter Using Digital IC (CD4001)
  
• Tracking transmitter
  
• 5W PLL Transmitter
  
• Miniature FM transmitter
  
• Sensitive FM transmitter
  
• Simple RF transmitter
  
• 1.5 volt tracking transmitter
  
• Tracking transmitter
  
• Micro Power FM Broadcasting Circuits
  
• Low Power FM Transmitter
  
• RF/SS Handie Hopper Transmitter Schematic
  
• 30-Meter QRP Transmitter for Morse Code
  
• Miniature FM Transmitter #1
  
• Miniature FM Transmitter #2
  
• Miniature FM Transmitter #3
  
• Light sensing RF transmitter
  
• Micro-Spy with FETs
  
• Micro-Spy with USW
  
• Micro-Spy with TTL