Radio Frequency (RF) Circuits (05)

Circuit Collection: HF-VHF-UHF, Microwave, 900MHz, 2.4GHz, AM-FM-ASK-FSK-PSK, SSB-DSBSC. Transmitter and Receiver, Modulator-Demodulator, Amplifier, Oscillator, WiFi Radio, GSM Radio, Wireless devices, Synthesizer, PLL, AGC, Measurement & Metering, Fox Hunting, Direction Finder, GPS

About Project Links

• 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