YO3DAC - Homebrew RF Circuit Design Ideas

Homebrew RF Circuit Design Ideas

http://www.qsl.net/va3iul/

Transceivers	Receivers
80m 5W CW Transceiver 7 MHz QRP Transceiver - DL5NEG 27 MHz R/C Transceiver 49 MHz Walkie-Talkie 432 MHz Data Transceiver QRP SSB Transceiver QRP Transceiver 40m/20m - IK3OIL Short Range Wireless Data Communication Transceiver QRP 20m SSB HF Transceiver CW SSB NorCalSierra Transceiver QRP 40m - F6BQU Transceiver SSB with 9MHz-IF 20m Transceiver BITX - VU2ESE 40m - 20m Dual-band Transceiver - VU2ESE 10 GHz I/Q Transceiver - S53MV 7 MHz Transceiver - DK6SX MIZUHO MX21S QRP Transceiver HF SSB QRP Transceiver - YD1JJJ 40m CW QRP Transceiver - NT7S Long Range FM Cordless Telephone 3.5 MHz 5W CW Transceiver - JF1OZL 14 MHz 10W SSB Transceiver - JF1OZL 21 MHz QRP SSB Transceiver - JF1OZL 40m SSB Transceiver Santerre - F6FEO 10MHz 1W Transceiver NE-QRP 20m CW Transceiver - 7N3WVM 20m QRP Transceiver - PA2OHH 40m SSB Transceiver PQDS - XQ5FOD 40m CW Transceiver - JG1EAD 20m SSB Transceiver - Taurus - SP5DDJ 80m CW Transceiver - Aquarius - SP5DDJ VHF FM Transceiver - DF5FC 10m Transceiver MiniPIG - W8DIZ 80m CW Transceiver - Libra - SP5DDJ 30m CW Transceiver - 7N3WVM 50 MHz SSB/CW Transceiver - 7N3WVM 160m SSB Transceiver - G3TSO 20m CW Transceiver - K8IQY 30m PSK31 Transceiver - NN1G 30m CW Transceiver - K1SWL 40m CW Transceiver - K8IQY 50 MHz SSB Transceiver - KD1JV 75m QRP SSB Transceiver - WA7JHZ 80m All-BC547 SSB Transceiver - VK3AJG PSK31 Transceiver - KD1JV CB AM Receiver-Transmitter 10 MHz QRP Transceiver - PA2OHH 40m CW Transceiver - PY2MG 40m CW/DSB Transceiver - PY2MG 40m SSB Transceiver - PY2MG 80m Unichip Transceiver - G0UPL HF Dual-Conversion Transceiver - YO3DAC/YO3BAL 20m CW Transceiver Norcal 30m CW Transceiver Norcal 40m CW Transceiver Norcal 20m or 30m Image-Rejection Transceiver Norcal-2030 10m CW Transceiver K8IQY 75m DSB Transceiver - KE7HR 14 MHz PSK31 Transceiver - K1SWL 80m DSB Transceiver - PA3ANG 430 MHz SSB Transceiver - JF1OZL 27 MHz Walkie-Talkie 40m-20m CW Transceiver - LZ3AI 80m All-2N2222 CW Transceiver - OK2BEU 144 MHz QRP CW Transceiver 144 MHz Simple Walkie-Talkie 144 MHz AM Walkie-Talkie - YO3AVE 2m PLL FM Transceiver - DC1YB 20m CW Transceiver - DC1YB 144 MHz 2-channels Walkie-Talkie - DC1YB 7 MHz CW Transceiver - W7EL 20m Bell-Ringer CW Transceiver - AA1TJ 50 MHz FM Transceiver for Audio and Data 80m CW QRP Transceiver 10m SSB Transceiver 20m SSB 50W Transceiver - YO3AVE 10.1 MHz 2W Transceiver - DJ1ZB 15m QRP 1.5W Transceiver - W9SCH 20m 1.5V Low Supply Voltage Transceiver - DL2AVH 20m Superheterodine Transceiver - NN1G 20m Two-Fer Transceiver - WU2J 30m "38-Special" Superhet Transceiver - AC6AN 40m 1.5W Rock-Steady Transceiver - K8IF 40m DB-25 QRP Transceiver - WA5JAY 40m "EverReady" Transceiver - WA6AHL 40m "Forty-9er" Transceiver - N6KR 40m Handbook Transceiver - WB6TMH 40m QRP Transceiver - N4HCJ 40m QRP Transceiver - W3TS 80m-40m-30m Superhet Transceiver - NN1G 80m CW-QSK Transceiver - NN1G 80m One-Transistor CW Transceiver - WB3EEL 80m SMD Transceiver - W1CFI HF QRP 1.5W Transceiver - KN1H HF "The-Phoenix" QRP Transceiver - W3TS 30m QRP Transceiver - K8IF 1.8 MHz QRP Transceiver - G3TXQ 80m/160m Transceiver - G4ENA 20m 5W SSB/CW Transceiver MFJ-9420 40m / 20m RockMite CW Transceiver - K1SWL 1.8MHz Transceiver - G3TXQ 20m Transceiver - G4ENA	3.5 MHz to 10 MHz Superheterodine Receiver 7 MHz Direct Conversion Receiver 20m Direct Conversion Receiver 27 MHz R/C Receiver 80m/40m Direct Conversion Receiver 80m Superheterodine Receiver Aircraft Receiver 118 MHz to 136 MHz AM Superheterodine Receiver with NE612 Shortwave AM Receiver 2 Bands Shortwave AM Receiver HF Receiver SSB Superheterodine Receiver HF SSB CW Superheterodine 144 MHz SSB Receiver - W1VT Two-stages HF Regenerative Receiver 80m/40m IQ Receiver - AK4AA 40m Direct Conversion Receiver - VU2ESE 1.8 MHz to 14.5MHz Direct Conversion Receiver 432 MHz FM Receiver - DF2FQ HF Receiver - WN5Y 144 MHz FM Receiver FM Receiver for Airband 137 MHz 14.070 MHz PSK31 Receiver - DL6FAP 20m PSK31 Receiver - DG2SK Ten-Tec 1253 Shortwave Receiver Direct Conversion Receiver with MOSFETs HF Direct Conversion Receiver - VU2UPX HF Receiver with MC3362 - VU2UPX 40m Binaural I/Q Receiver - KK7B Two Regenerative Receivers 40m SOP Receiver - N2CX Clasic40 Receiver - KK7B Herring HF Receiver - WA1LNQ Receiver for DRM - Digital Radio Mondiale - DL5MGD Receiver for 80m and 20m - OK2UGS Weather Receiver 137 MHz - F6BQU 144 MHz FM Receiver - PU2XJE Simple VHF FM Receiver Regenerative FM Receiver 80m SSB Super-80 Receiver - VK3YE VHF Receiver PLL - DF1FO Superregenerative HF Receiver Superregenerative VHF Receiver Receiver HF/VHF-AM/FM/SSB Grundig YB400 30m "Dirty-Thirty" Receiver - VE7BPO FM Broadcast Receiver TDA7000 General Coverage AM Receiver - ON6MU Direct Conversion Receiver AM-Immune - KD1JV Short-Wave AM Receiver - KD1JV 3x2N2222 Short-Wave AM Receiver 40m 3xFET Direct Conversion Receiver 40m Software Defined Radio - PY2MG 80m Direct Conversion Receiver - PA2OHH HF AM/SSB Receiver - PY2MG Short-Wave Regenerative Receiver - PA2OHH VHF FM Receiver - PY2MG CB Receiver TCA440 20m SSB Receiver 118 MHz to 136 MHz Aviation Band Receiver Superregenerative RX for 144-432-1296 MHz - F9HX FM Receiver with Strength-meter Economy Short-Wave Receiver 2m AM Receiver 20m Direct Conversion Receiver - W1VD 40m AM/CW/SSB Regenerative Receiver 80m Two CW/SSB Superheterodine Receivers 80m SSB/CW/AM Superheterodine Receiver 80m Receiver IF=9MHz 144 MHz All-FET Direct Conversion Receiver 144 MHz SSB/CW Direct Conversion Receiver 144 MHz Superregenerative Receiver 432 MHz SSB/AM Receiver - YO3AVE FM Direct Conversion Receiver PNP Shortwave Receiver Simplest Direct Conversion Receiver VHF Superregenerative Receiver HF MultiPig Receiver - W8DIZ 0.3 MHz - 30 MHz SSB/AM Receiver - DC1YB 40m Parametric-Regenerative Receiver - AA1TJ HF Simple Regenerative Receiver - N1TEV 40m Direct Conversion Receiver - DL2YEO 80m All-BJT's Direct Conversion Receiver 30m SSB Superheterodine Receiver 40m CW-SSB Simple Superhet Receiver 80m-40m Direct Concersion Receiver - VK3AWC All HF Bands Direct Conversion Receiver 410 MHz - Superregenerative Receiver for Remote Keyless FM Broadcast Superregenerative Receiver - VK2ZAY Simplest Shortwave Receiver VHF Superregenerative Receiver - VK2ZAY 136 MHz Airband Dual-Conversion Receiver FM / AM Superregenerative Receiver VHF Superregenerative Receiver with Squelch - N1TEV 1 MHz - 30 MHz QRP Receiver - KD1JV 14 MHz Simple Superhet Receiver - W7ZOI 20m Two-Superhet's Receivers - K9AY 40m Superhet Receiver with 74HC4053 - KD1JV 40m CCS Superhet Receiver - WB0RMT 40m "Tuna-Twin-Too" Receiver - KO4WX Shortwave "PipSqueak" Receiver - NA5N 3 MHz - 5 MHz Cascade Regenerative Receiver - WD5HOH 3 x Superregenerative Receivers - RSGB 40m MRX-40 Receiver - K8IDN Multiband HF Direct Conversion Receiver - RSGB 7 MHz Rock-Bending Receiver - WI5W HF MicroR2 SSB/CW Receiver HF DCR Polyphase Receiver - G0UPL
Transmitters	Transverters and Converters
10W 40m CW Transmitter 2m Band Beacon Beacon for 144 MHz Beacon for VHF HF QRP CW Transmitter VHF Beacon Wireless AM Microphone X-tal VHF FM Transmitter 7 MHz CW QRP Transmitter 14 MHz CW QRP Transmitter 145 MHz X-tal FM Transmitter 27 MHz AM/FM Transmitter HF QRP CW Transmitter VXO - W7ZOI FM Audio Transmitter with Monitor 0.5W FM Transmitter 88MHz-108MHz 7 MHz 5W QRP Transmitter 7 MHz 12W Transmitter - NB6M 10m VXO QRP Transmitter - NB6M 27 MHz 2W Transmitter 40m 5W CW Transmitter - N1HFX 75m Phasing SSB Exciter - WA7JHZ Miniature Tracking Transmitter 4W PLL FM Transmitter - XQ5FOD 20m 1W Transmitter - PA2OHH 40m CW Transmitter - PY2MG HF SSB Exciter - KD1JV 3 GHz Beacon - G4DDK 5.7 GHz Beacon - F6BVA SHF Micro-beacon - F4BAY 6m CW Transmitter - VE7GC 1W HF CW Transmitter 50 MHz QRP AM Transmitter 80m-40m 6W CW Transmitter 80m Beacon 144 MHz 1W FM Transmitter 144 MHz AM/FM VFO Controlled Transmitter 144 MHz Low Power Beacon - YO3AVE 432 MHz CW Transmitter 432 MHz QRP FM Transmitter 1296 MHz Simple Transmitter QRP Transmitters 1.65 MHz QRP AM Transmitter 88 MHz - 108 MHz FM Transmitter HF Low-Power AM Transmitter 88 MHz - 108 MHz X-tal controlled 1W FM Transmitter 30m CW Transmitter 80m CW VFO Transmitter VLF 15W Transmitter 9 MHz SSB Modulator 88 MHz - 108 MHz 0.5W FM Transmitter High-Quality AM Transmitter 27 MHz 4W AM Transmitter 2W Two-Bands Transmitter - VK3XU 7 MHz QRP VFO Transmitter - W7ZOI 14 MHz 1W VFO Transmitter - W8PJ 40m QRP CW Transmitter - WB8VGE 40m The-QRP-Key Transmitter - WA8MCQ All-Bands VXO Transmitter - KN1H 2m Low-Power CW Beacon 9 MHz SSB Modulator Phasing-Method - RSGB SSB Modulators Filter-Method - RSGB 88 MHz - 108 MHz 25mW FM Transmitter 88 MHz - 108 MHz 20W FM Transmitter 40m MicroT2 SSB/CW Transmitter HF MKII All-Band CW Transmitter	1.3 GHz Transverter - DB9LN / DB6NT 2.3 GHz to 144 MHz Transverter - DB6NT 5.7 GHz Transverter - DB6NT 10 GHz to 144 MHz Transverter - DB6NT 50 MHz Transverter - OE9PMJ 144 MHz to 28 MHz RX Converter MOS 144 MHz to 28 MHz RX Converter FET VHF to 1.3 GHz up-converter 1296 MHz to144 MHz Transverter - F5LGJ 10 GHz Transverter 70 MHz to 28 MHz Transverter - OZ2M No-Tune Transverter 1.3 GHz to 144 MHz - KK7B No-Tune Transverter 2304 MHz to 144 MHz - W8NLC Javornik 144 MHz to 14 MHz Transverter - S53WW 50 MHz junk-box converter - WA3ENK 50 MHz to 28 MHz Transverter - DK7ZB 50 MHz to 28 MHz simple Converter 144 MHz to 28 MHz Transverter Very Low Frequency Converter 0-250 kHz to 3.5 MHz UHF to VHF TV Converter 144 MHz to 28 MHz Receive Converter - N0GZ 1296 MHz Transverter - W1GHZ 144 MHz to 28MHz Transverter - LT2S 23cm to 70cm Transverter - I2SG 144 MHz to 2.4 GHz Upconverter 1.3 GHz to 144 MHz Transverter - OE9PMJ 2.3 GHz Transverter - DC8UG 5.7 GHz ATV Converter - DL1IN 70 MHz to 21 MHz Transverter - DF2FQ 2.32 GHz to 144 MHz Converter - DL5NEG 40m to 11m Transverter - PY2MG 50 MHz to 28 MHz RX Converter - PY2MG All-Bands HF to 9 MHz IF Transverter - YO3DAC/YO3BAL 144 MHz to 14 MHz Transverter - SM0VPO 2.3 GHz ATV Upconverter - F1HPR 2.3 GHz to 432 MHz Converter - DL5NEG 144 MHz to 28 MHz Transverter - WA6CDR 868.3 MHz to 144 MHz Transverter - F1JGP 1296 MHz to 144 MHz Transverter - F1OPA 0-550 kHz Very Low Frequency Converter 1.3 GHz ATV Downconverter 1.8 MHz to 28 MHz Transverter - YO2IS 24 MHz to 7 MHz Receive Converter 28 MHz to 432 MHz Linear Up-Converter 144 MHz to 14 MHz Transverter 144 MHz to 28 MHz RX Converter - YO3BAL / YO3DAC 144 MHz to 28 MHz Converter 2m to 10m RX Converter 144 MHz to 1296MHz Up-Converter 432 MHz to 28 MHz RX Converter 432 MHz to 50 MHz Transverter 432 MHz to 144 MHz RX Converter - YO3BAL 432 MHz to 144 MHz Downconverter 432 MHz to 144 MHz Transverter 1296 MHz to 144 MHz Receive Converter 28 MHz to 50 MHz Transverter - RSGB 136 kHz to 4.137 MHz Transverter - RSGB
RF Power Amplifiers	High Frequency Low Noise Amplifiers
HF 10W Power Amplifier 50MHz 100W Power Amplifier 50MHz 350W Power Amplifier 2xBLX15 3 MHz to 30 MHz 80W Power Amplifier 144 MHz 125W Power Amplifier HF 60W Power Amplifier IRF840 HF 10W to 200W Class E/F Power Amplifier 14 MHz 20W Linear Power Amplifier 144 MHz 100W Power Amplifier 144 MHz 180W Power Amplifier 432 MHz 50W Power Amplifier 432 MHz 110W Power Amplifier 144 MHz 75W PA with RX preamplifier 144 MHz 110W Linear PA 28 MHz 150W Power Amplifier 144 MHz 200W PA with RX preamplifier HF PA's with MOSFETs - DK7ZB 50 MHz 35W PA with MOSFET - DJ9FG HF 40W PA with MOSFET - WA2EBY 88-108 MHz 40W FM Power Amplifier 144 MHz 100W Push-Pull PA - YU1AW UHF 25W Power Amplifier VHF 30W Power Amplifier HF 10W MOSFET PA - LU8EHA HF 8W Power Amplifier - F6BQU 80m 5W Power Amplifier - S57NAN 2304 MHz 2.5W Power Amplifier - WA3JUF 50 MHz 350W Power Amplifier - 2xBLX15 3.4 GHz 3W Power Amplifier - DB6NT 3.4 GHz 7W Power Amplifier - DB6NT 10 GHz 4W Power Amplifier - DB6NT 1296 MHz 50W Power Amplifier - DJ1EE 70 MHz 160W Power Amplifier - GI0GDP 144 MHz 160W Power Amplifier 144 MHz 100W Linear Power Amplifier HF 7W Power Amplifier - ON6MU 50 MHz 150W Power Amplifier 1xBLX15 144 MHz 100W Power Amplifier 2xBLY94 40m 10W Power Amplifier - PY2MG 80m/40m 30W Power Amplifier - PY2MG 1.6 MHz - 30 MHz 300W Power Amplifier 2xBLF177 14 MHz 25W 2x MOSFET Power Amplifier - F6BCU 28 MHz 80W SSB Power Amplifier BLF246 88 MHz - 108 MHz 15W FM MOSFET Power Amplifier 100 MHz - 450 MHz 250W Power Amplifier BLF548 27 MHz 1kW Low Cost MOSFET Power Amplifier 27 MHz 500W Class-E MOSFET Power Amplifier 50 MHz 300W Linear MOSFET Power Amplifier 88 MHz - 108 MHz 300W MOSFET Power Amplifier 144 MHz 50W Power Amplifier - M0UKD 2.3 GHz 1.5W Power Amplifier - F1JGP 2.3 GHz 4W Power Amplifier - F5EFD 2.3 GHz 10W Power Amplifier - F1JGP 5.7 GHz 0.5W Power Amplifier - F1HPR 5.7 GHz 4W Power Amplifier - F1JGP 10 GHz 1W Power Amplifier - F1JGP 24 GHz 80mW Power Amplifier - F1GHB 1.3 GHz 1W Power Amplifier - IW2BC HF 600W MOSFET Power Amplifier HF 180W Power Amplifier 1 MHz to 30 MHz 5W Power Amplifier 1.8 MHz to 30 MHz 15W Power Amplifier - W8DIZ 10 MHz to 90 MHz 1kW MOSFET Power Amplifier 225 MHZ 450 MHz 10W Power Amplifier 70 MHz 150W Power Amplifier - YU1AW 135 MHz - 175 MHz 7W Power Amplifier 135 MHz - 175 MHz 15W Power Amplifier 400 MHz - 520 MHz 8W Power Amplifier 1.78 GHz Class-F Power Amplifier 1 GHz Inverse-Class-F Power Amplifier 13.56 MHz 400W Class-E Power Amplifier 27 MHz 500W Class-E Power Amplifier 144 MHz 55W Class-E Power Amplifier Cascode CMOS Class-E Power Amplifiers Class-F LDMOS Power Amplifier Equivalent Circuits Class-E PA VHF Class-E Power Amplifier 2 MHz - 50 MHz 1kW MOSFET PAs 30 MHz 300W MOSFET Power Amplifier VHF 150W MOSFET Power Amplifier VHF-UHF Broadband 100W Power Amplifier VHF 80W FM Power Amplifier HF 10W Power Amplifier - KD1JV 1 MHz - 30 MHz 150W Linear Power Amplifier 28 MHz 100W Linear Power Amplifier 7 MHz 200W Class E/F MOSFET PA - KN6EK HF 30W Class-D Linear Power Amplifier - OH2GF 1450 MHz - 1550 MHz 45W LDMOS Power Amplifier HF Solid-State QRP Power Amplifiers HF 250W LDMOS Power Amplifier 1.8MHz to 10.1MHz 5W MOSFET Power Amplifier 50MHZ 16W MOSFET Power Amplifier	2.4 GHz LNA 30dB-Gain 0.6dB-NF 10 GHz Low Noise Amplifier 144 MHz GaAs LNA 144 MHz LNA - YU1AW 432 MHz LNA MGF1402 432 MHz LNA - YU1AW 950 MHz to 2150 MHz LNA 1296 MHz Low Noise Amplifier Antenna Preamplifier 100 kHz to 220 MHz UHF TV Preamplifier 25dB Gain LNA for UHF Band BFP540 High IP3 HF LNA L-band Low Noise Amplifier 950 MHz - 2150 MHz LNB HF Preselector - DL2JDN 3.5 GHz PHEMT LNA 0.9dB NF 10 GHz GaAs LNA - N1BWT 24 GHz HEMT LNA - WA3RMX 432 MHz GaAs LNA - N6CA 1.3 GHz LNA - PE1BVJ 2.4 GHz LNA +40dBm OIP3 100 MHz to 500 MHz LNA 800 MHz to 1000 MHz BJT LNA 900 MHz BJT LNA 900 MHz High Linearity pHEMT LNA 2.4 GHz LNA, 1.1dB-NF, +10dBm-IP3 2.4 GHz LNA 0.6dB-NF, 15dB-Gain 5.7 GHz LNA 1.2dB-NF, 15dB-Gain 50 MHz Low Noise FET Preamplifier - W1FB 432 MHz pHEMT LNA 0.4dB-NF - JH0WJF HF High Dynamic Range LNA VHF-UHF GaAs LNA - W3KKC 88MHz-108MHz Cascode LNA Short-Wave Tunable Preamplifier 2.4 GHz 0.5dB-NF pHEMT LNA 400 MHz LNA BFG540 Wideband 432 MHz to 1296MHz pHEMT LNA - G0MRF 900 MHz LNA BFG505 Wideband pHEMT LNA - W6PQL 1296 MHz Very Low Noise Amplifier - G4DDK 2304 MHz Very Low Noise Amplifier - G4DDK 1296 MHz BJT Low Noise Amplifier - WA6UAM 2.4 GHz LNA - F5JGP 1296 MHz LNA - F1JGP 70 MHz to 560 MHz Wideband High-Dynamic-Range LNA 100 kHz to 600 MHz Wideband Linear Amplifier HF Receive Loop Antenna Preamplifier 1 MHz to 100 MHz Dual-Stage LNA 40 MHz to 800 MHz Gain=28dB LNA 144 MHz BF981 LNA 144 MHz Tuned LNA 400 MHz to 800 MHz Gain=30dB LNA All-Bands Preselector 1.3 GHz GaAs-FET Low Noise Preamplifier - OH3MCK GPS 1.575 GHz, G=18dB, NF=1.3dB LNA 2140 MHz G=15dB, NF=1.5dB GaAs LNA 1 MHz - 30 MHz Ultra High Dynamic Range LNA - YU1AW 2.4 GHz two-LNA's for Active Antenna 10.24 GHz GaAs LNA's 900 MHz G=22dB, NF=1.9dB, BJT LNA 50 MHz Dual-Gate LNA - OH2AUE 1.5 MHz - 50 MHz LNA+PA - YU1LM 900 MHz Integrated Cascode LNA 2.4 GHz, NF=1.5dB, G=14dB, HJ-FET LNA L-Band pHEMT LNA Voltage Probe Antenna Preamplifier - VE7BPO High-Dynamic Range Preamplifier - G3SBI 1.8 MHz to 54 MHz Preselector MFJ-1040
Oscillators	RF Signal Sources and Multipliers
5 MHz to 5.4 MHz Variable Frequency Oscillator 6 MHz to 6.35 MHz Variable Frequency Oscillator 7 MHz to 7.3 MHz Variable Frequency Oscillator 30 MHz to 200 MHz VCO 50 MHz to 150 MHz Crystal Oscillator 50 MHz Crystal Oscillator 100 MHz Crystal Oscillator 100 MHz VCXO 455 kHz Ceramic Filter BFO Butler Crystal Oscillator Vackar VFO G3PDM High Power VFO - K7HFD Low Voltage Crystal Oscillator Parallel Mode Crystal Oscillator Series Mode Crystal Oscillator Variable Crystal Oscillator VXO 750 MHz Push-Push Oscillator Butler Overtone Crystal Oscillator High Overtone Crystal Oscillator 3 MHz to 30 MHz VCXO Low Noise Differential VFO - 5 MHz to 5.5 MHz VHF Oven Crystal Oscillator - W6PQL 1.3 GHz VCO with Emitter Noise Feedback 2 GHz to 4GHz VCO 220 MHz Low Noise Cascode Oscillator 600 MHz to 2.2GHz VCO 800 MHz to 2.2GHz Push-Pull VCO 1 GHz Differential VCO with Amplitude Control 10 MHz VXO 455 kHz Beat Frequency Oscillator Crystal Oscillators Types VXOs Types and Schematics 750 MHz to 1250 MHz VCO High Performance VHF Overtone Oscillator - GW4DGU Octave VCO with active bias 200 MHz to 400 MHz VCO 1700 MHz to 1950 MHz VCO Very Low Phase Noise Crystal Oscillator - Wenzel 1 GHz Very Low Phase Noise VCO 74 MHz to 105 MHz Low Noise VCO 100 MHz Low Phase Noise VCXO 125 MHz Very Low Phase Noise Oscillator - ADI 600 MHz to 1200 MHz Low Phase Noise VCO 18 MHz Stable and Constant Amplitude LO 1100 MHz to 1350 MHz VCO 70 MHz to 210 MHz VCO with Dual-Gate MOSFET 5 MHz to 6 MHz VFO - VE7CA 7 MHz VXO - NB6M 14 MHz VXO - NB6M 10 GHz DRO Oscillator 180 MHz X-tal Oscillator - F1ANH 5 MHz X-tal Coupled-Resonator LO 10 MHz Third-Overtone Pierce LO 10 MHz X-tal Cascode Oscillator 27 MHz Third-Overtone with TTL-output LO 40 MHz to 70 MHz VCO 42 MHz to 72 MHz VCO 100 MHz Fifth-Overtone Butler VCXO 110 MHz to 210 MHz VCO ESM500-Receiver 118 MHz to 198 MHz FM-Modulated LO 160 MHz to 260 MHz VCO ESV-Receiver 260 MHz to 520 MHz VCO HP8662A-SigGen 380 MHz to 520 MHz VCO 450 MHz Quarter-Wavelength VCO 567 MHz SAW Oscillator 800 MHz Very Low Phase Noise VCO Ceramic Resonator VCO HF Multiband VCO EK070-Receiver HF Multiband VCO ESH3-Receiver Low Phase Noise Push-Push VCO Third-Overtone VCXO with AGC 2.4 GHz to 2.8 GHz VCO 10.5 GHz DRO 102 MHz VCXO Cavity-Tuned Oscillator Butler X-tal Oscillators DC-Switched X-tal Oscillator FM-Modulated X-tal Oscillator 55.2 MHz VCXO - KA7OEI 1.93 MHz to 1.98 MHz Very Stable VFO - W8DIZ 5.05 MHz - 5.075 MHz Clapp VFO 1 MHz to 5 MHz Goral Type Oscillator 100 MHz Dual-Gate MOSFET Oscillator Triple Beat Frequency Oscillator 4.9 MHz to 5.5 MHz VFO - TS520 5.225 MHz - 5.575 MHz Franklin Stable VFO 7 MHz QSK VFO - NN1G Widerange VCXO W7ZOI 5 MHz VXO with ALC 21MHz VCXO - G3MEV Variable Crystal Resonator Oscillator - K2BLA	2.4 GHz Signal Source - W6PQL 900 MHz Signal Source - W6PQL 1104 MHz Signal Source - W6PQL 1296 MHz Signal Spurce - W6PQL 116 MHz High Level X-tal LO 10 GHz LO Multiplier - N1BWT 404 MHz LO - AA5C 12 GHz Signal Source - DB6NT 2808 MHz Signal Source - DC0DA 3256 MHz Signal Source - DB6NT 5616 MHz Signal Source - DB6NT 10223 MHz Signal Source - DL1RQ 10368 MHz Signal Source - DJ6JJ 800 MHz to 2.4 GHz Frequency Tripler Frequency Multiplier 10 MHz to 30 MHz 432 MHz to 1296MHz Frequency Tripler Active Frequency Quadrupler 1.3 GHz Signal Generator - W6PQL 2.4 GHz Signal Generator - W6PQL 1152 MHz PLL Signal Source - OZ1GDS 1152 MHz Signal Source - F6BCU 1150/1152 MHz Signal Source 1152 MHz Signal Source - G4DDK 422 MHz to 1267 MHz Diode Frequency Tripler 1296 MHz Signal Source - W6FZJ 1296 MHz Weaksignal Noise Source - WA6UAM L-band Signal Source - N6TX 1.42 GHz to 5.7 GHz Multiplier - F1HPR 2.5 GHz Signal Source - G4DDK 2 GHz to 12 GHz Multiplier - F1OPA 9.5 GHz Signal Source - F6BVA 10.5 GHz Signal Source - F6BVA 12 GHz Signal Source - F6BVA 130 MHz to 6 GHz Multiplier - F1JGP 1296 MHz to 10368 MHz Multiplier - F6BVA C-band Signal Source - F1JGP 100 MHz to 1700 MHz Frequency Multiplier 902 MHz Signal Source 200 MHz to 600 MHz Frequency Tripler 800 MHz to 2400 MHz Frequency Tripler Varactor Tripler 0.5 MHz to 110 MHz AM/FM Signal Generator Simple 2.4 GHz Signal Source 1 GHz to 1.3 GHz Signal Source - G4DDK Frequency Multipliers Types VFO Stabilizers One chip VFO Stabilizer - G0UPL VFO Stabilizer - PY2MG VFO Stabilizer - PA0FRI Huff-and-Puff VFO Stabilizer - WN5Y VFO Stabilizer - PA0CMU 2 x Huff-and-Puff VFO Stabilizers - RSGB 40 MHz to 70 MHz 3-band Frequency Stabilizer - DC4KU
RF Switch / Attenuator	RF Mixers
IF Filters Switching Circuit TX/RX RF Switch FET TX/RX RF Switch PIN RF Sensing TX/RX Switch RX/TX Quarter-Wave PIN Switch PIN Attenuator BAR61 Variable PIN Attenuator 1dB to 20dB AGC with PIN Attenuator 4xPIN Diodes Wideband Switch Modulator-Demodulator using PIN Diodes Phase Shifter using PIN Diodes RF Attenuator Types using PIN Diodes RF Switch Types using PIN Diodes AGC PIN Attenuator Automatic Antenna Attenualtor 45dB range - RSGB HF 25W PIN Antenna Switch All Transfer PIN Switches PIN Diode Limiter SPMT PIN Switches	Doubly Balanced Mixer MC1496 Mixer Diplexer Dual MOSFET Mixer Microwave Mixers Stripline Quadrature Microwave Mixers High IP3 Mixer +40dBm - IK4AUY 1296 MHz Diode Mixer - WA6UAM Dual-FET HF Mixer High Dynamic Range HF Mixer High IP3 (33dBm) BJT Mixer 900 MHz BJT Gilbert Mixer HF Sub-Harmonic Mixer 1152-10368-24192 MHz Harmonic Mixer Microwave Harmonic Mixer 1296 MHz DBM with ferrite balun - WA6UAM 1296 MHz DBM with coaxial balun - WA6UAM Microwave Coaxial Diode Mixers Distribute Diode Single-Balanced Narrowband Hybrid Mixer Single Schottky Diode Mixer Two-BJT Product Detector Dual-Gate MOSFET Product Detector
ATV Transmitters/Modulators	RF Test Circuits
Audio/Video Transmitter AM TV Transmitter 23cm ATV FM Transmitter A-V UHF TV Modulator Crystal TV Video Modulator TV Audio-Video Transmitter Simple TV Video Modulator TV Modulator A-V Transmitter - ZP5ZDM A-V VHF Transmitter FM ATV Receiver UHF A-V 1W Transmitter 1296 MHz FM ATV Transmitter - I2ROM ATV FM Receiver-Demodulator 470 MHZ PLL FM Video Demodulator Two ATV FM PLL Demodulators 432 MHz ATV AM Transmitter 439 MHz ATV AM Transmitter 902 MHz PLL FM ATV Transmitter 1296 MHz 300mW FM ATV Transmitter 1296 MHz AM ATV Transmitter 1296 MHz FM ATV Transmitter - F3YX UHF 2W AM ATV Transmitter UHF 5W AM ATV Transmitter 1296 MHz PLL controlled FM ATV Transmitter - N9ZIA	Capacitance Meter Field Strength Meter LM324 HF Q-meter VK5JST Antenna Analyzer - F6BQU RF Power Calibrator VHF Wattmeter 88 MHz - 960 MHz Antenna Analyzer LED RF Power Meter - N9ZIA Return Loss Bridge Return Loss Bridge with AD8307 HF SWR Bridge Grid Dip Meter 2 MHz - 20 MHz Field Strength Meter 3 Levels BandScope for 2m Band Lightening Detector 3-Digits Dip Meter Calibrated Noise Source Capacitance Meter using DVM Inductance Meter using DVM High-Impedance RF Probe DC to 500 MHz Log Detector/Amplifier - DJ1ES L-C-R Bridge - G3BIK Phase Meter Inductance Meter - VK5BR L/C Meter - IZ7ATH FM Deviation Meter Flicker-Noise Generator - Wenzel 2.4 GHz mW Power Meter - F1HDD Simple Crystal Tester - F5JTZ Inductance Meter - N5ESE Magnetic Field Meter RF dBu Meter Two chips LED Frequency Counter - PA2OHH 0-99 kHz Frequency Counter - G0UPL LED SWR/Power meter - PY2MG Electro-Magnetic Waves Detector Long-Wave Lightening Detector Cable Reflection Tester - N9ZIA TDR Circuit and Signals - T.Engdhal 1 MHz to 1 GHz LED Absorption Meter - GW1TDV S9 HF Signal Generator Antenna Noise Bridge Audio Filter Analyzer True Linear RF Power Detector Grid Dip Meter 3.5 MHz to 110 MHz 1.6 MHz to 150 MHz Modulated Grid-Dip Meter Five Grid-Dip Meters 30 kHz to 30 MHz Sinusoidal Signal Generator Capacimeter using NE555 0-1uF Capacimeter Coil Short-Circuit Detector Fonometer All-BJTs L-C Meter VHF FM Signal Generator Sweeper for 455 kHz IF 500 kHz to 3 GHz LED Field-Strength Meter 2xBJT Capacimeter Varactor Capacimeter Automatic VSWR and Power Meter - W0INK RF Sweeper - VK2ZAY Very Low Frequency Survey Probe - VK2ZAY 1 MHz to 30 MHz Noise Source - G1HSM Capacimeter with 2xNE555 - WA8MCQ Dual-LED SWR Indicator for QRP HF In-Line Return Loss and Power Meter - N2PK SWR Bridge Tuner "Rainbow" - N2CX Spectrum Analyzer on the Oscilloscope Grid-Dip Meter with Digital Display Marker Generator - KB1MW Micro-Wattmeter - W7DB
Power Supply	Audio
DC Protection Circuits Overvoltage Protection Power Supply 13.8V/20A 12V Battery Charger 13.8V Float-Charging Power Supply 28V / 20A Power Supply Low Noise Power Supply for Audio Amplifiers Power Supply with Noise Clean-up Circuit - Wenzel 13.8V / 10A Power Supply - N1HFX 13.8V / 40A Power Supply - OZ2BKK 13.8V / 25A Power Supply - F5JTZ 28V / 50A Power Supply - F5UAM 1.25V-25V / 2.5A Power Supply DC/DC using a Linear Regulator High Voltage DC/DC Converter Electronic CW Keyers Electronic Keyer - F5JTZ Iambic Touch-Keyer - YC5NBX Simple CMOS Keyer - OH7SV Simple Electronic Keyer - N1HFX CW Electronic Keyer CMOS Iambic Keyer - N5FC All-BJTs Keyer CW Keyer - YO3APG Deluxe All-Solid-State Iambic Keyer - W1RML Electronic CW Keyer - YO3CZI Single-IC CW Keyer - W9HFM CW Keyer with NE555 Memory Keyer - AI2T	Active CW Filter and Audio Amplifier Dynamic Noise Filter Microphone Preamplifier Electret Microphone Speech Processor Microphone Amplifier Low/High Impedance Class-A Headphone Amplifier Class-A Audio Amplifier Speech Processor - TL081 Variable CW Bandpass Filter Variable CW Filter and Amplifier Audio Automatic Gain Control Baxandall Audio Filter Microphone Amplifier with ALC Audio Amplifier with mute control Noise Canceling Electret Microphones - WB9YBM Dynamic Microphone Preamplifier Speech Processor - All BJT Audio Preamplifier with Dynamic Noise Reduction Class-A HIFI Headphone Amplifier Super Class-A Low Distortion 3W Amplifier CW Audio Filter with Digital Selection - PY2MG Microphone Preamplifier with Tone Control - PY2MG Boosting Gain and Limiter of LM386 - VK3AWC Variable Audio LPF with MAX293 300 Hz - 3 kHz Microphone Filter VOX Circuit Voice Level Meter Microphone Dynamic Compressor 1kHz Sine Wave Oscillator High-Pass Low-Pass Microphone Preamplifier - N2MNN Passive Audio SSB-CW Filters - W3TS LC CW Band Pass Filters - DC8NR Audio Intelligibility Enhancer - N4GG Dual-Tone Audio Generator - VE3FIT RF Speech Clipper - DF4ZS
Microwave Circuits	Miscelaneus Circuits
Microwave Motion Detector Biasing Microwave GaAs FET's UHF Doppler Motion Detector 2.4 GHz Prescaler Divide by N using 74160 - Wenzel Staircase Frequency Divider - Wenzel Frequency Counter Prescaler 12 GHz : 1000 Prescaler - DG6RBP Quarter-wave Coaxial Baluns UHF Movement Detector Bias-Tee 5 kHz to 3 GHz Microwave Coaxial AM Diode Detector Microwave FM Diode Detectors Microwave Microstrip AM Diode Detector Power-Combining using Wilkinson Dividers Distributed Wideband Balun for Microwaves Microstrip Couplers Microstrip Stubs Phase Shifters Topology	High Dynamic Range Noise Blanker Left / Right Revolution Counter (for tuning) Active Baluns - Differential to Single Ended Active Baluns - Single Ended to Differential RF Activated Tone Monitor PTT Delay Circuit - W3KKC HF QRP Manual Tuner - W6JJZ Ultrasonic Proximity Detector Multi-Q Receive Loop Antenna Phase Detector with Discrete Components EK47-Receiver Low-Cost FSK Generator Satellite Finder Electrostatic Detector HF Line Coupler 4:1 Broadband Transformers Noise Blanker Balun Transformers Helical Resonator Dimensions Crystal Filters Types Laser-Torch Wireless Communication LNB 13V/18V H/V Switch Modulation Circuit for SHF Beacon AGC with Squelch Control AGC with AM Detector Receiver AGC with hang threshold AGC / S-meter - PY2MG AGC Audio Preamplifier Glitch Detector 10 MHz SSB Ladder X-tal Filter 27 MHz - 40 MHz Lumped Component Diplexer 430 MHz to 780 MHz Tunable Filter 433 MHz Lumped Components Balun RX/TX 27 MHz Remote Air-Speed Sensor for Cooling Fan 3xFETs Noise Blanker Active RF Isolator Low Frequency Active Isolator/Circulator - Wenzel Antenna-Tuner for QRP RIT for VFO Transceivers 3.58 MHz CW Ladder Filter - N2DCH 90-degrees Phase-Shifter for IQ-modulation Power Combiners / Dividers - RSGB S-meter 120dB Dynamic Range - DC4KU Variable Bandwidth X-tal Filter - G3UUR Broadband Transformers Prevent Thermal Runaway for BJT Power Amplifiers Temperature Compensation for X-tal Oscillators - I6MCF

Blog and Website visitor reports

home