Homebrew RF Circuit Design Ideas

 

Transceivers

Receivers

ˇ         80m 5W CW Transceiver

ˇ         7 MHz QRP Transceiver - DL5NEG

ˇ         27 MHz R/C Transceiver

ˇ         49 MHz Walkie-Talkie

ˇ         432 MHz Data Transceiver

ˇ         QRP SSB Transceiver

ˇ         QRP Transceiver 40m/20m - IK3OIL

ˇ         Short Range Wireless Data Communication

ˇ         Transceiver QRP 20m SSB

ˇ         HF Transceiver CW SSB NorCalSierra

ˇ         Transceiver QRP 40m - F6BQU

ˇ         Transceiver SSB with 9MHz-IF

ˇ         20m Transceiver BITX - VU2ESE

ˇ         40m - 20m Dual-band Transceiver - VU2ESE

ˇ         10 GHz I/Q Transceiver - S53MV

ˇ         7 MHz Transceiver - DK6SX

ˇ         MIZUHO MX21S QRP Transceiver

ˇ         HF SSB QRP Transceiver - YD1JJJ

ˇ         40m CW QRP Transceiver - NT7S

ˇ         Long Range FM Cordless Telephone

ˇ         3.5 MHz 5W CW Transceiver - JF1OZL

ˇ         14 MHz 10W SSB Transceiver - JF1OZL

ˇ         21 MHz QRP SSB Transceiver - JF1OZL

ˇ         40m SSB Transceiver Santerre - F6FEO

ˇ         10MHz 1W Transceiver NE-QRP

ˇ         20m CW Transceiver - 7N3WVM

ˇ         20m QRP Transceiver - PA2OHH

ˇ         40m SSB Transceiver PQDS - XQ5FOD

ˇ         40m CW Transceiver - JG1EAD

ˇ         20m SSB Transceiver - Taurus - SP5DDJ

ˇ         80m CW Transceiver - Aquarius - SP5DDJ

ˇ         VHF FM Transceiver - DF5FC

ˇ         10m Transceiver MiniPIG - W8DIZ

ˇ         80m CW Transceiver - Libra - SP5DDJ

ˇ         30m CW Transceiver - 7N3WVM

ˇ         50 MHz SSB/CW Transceiver - 7N3WVM

ˇ         160m SSB Transceiver - G3TSO

ˇ         20m CW Transceiver - K8IQY

ˇ         30m PSK31 Transceiver - NN1G

ˇ         30m CW Transceiver - K1SWL

ˇ         40m CW Transceiver - K8IQY

ˇ         50 MHz SSB Transceiver - KD1JV

ˇ         75m QRP SSB Transceiver - WA7JHZ

ˇ         80m All-BC547 SSB Transceiver - VK3AJG

ˇ         PSK31 Transceiver - KD1JV

ˇ         CB AM Receiver-Transmitter

ˇ         10 MHz QRP Transceiver - PA2OHH

ˇ         40m CW Transceiver - PY2MG

ˇ         40m CW/DSB Transceiver - PY2MG

ˇ         40m SSB Transceiver - PY2MG

ˇ         80m Unichip Transceiver - G0UPL

ˇ         HF Dual-Conversion Transceiver - YO3DAC/YO3BAL

ˇ         20m CW Transceiver Norcal

ˇ         30m CW Transceiver Norcal

ˇ         40m CW Transceiver Norcal

ˇ         20m or 30m Image-Rejection Transceiver Norcal-2030

ˇ         10m CW Transceiver K8IQY

ˇ         75m DSB Transceiver - KE7HR

ˇ         14 MHz PSK31 Transceiver - K1SWL

ˇ         80m DSB Transceiver - PA3ANG

ˇ         430 MHz SSB Transceiver - JF1OZL

ˇ         27 MHz Walkie-Talkie

ˇ         40m-20m CW Transceiver - LZ3AI

ˇ         80m All-2N2222 CW Transceiver - OK2BEU

ˇ         144 MHz QRP CW Transceiver

ˇ         144 MHz Simple Walkie-Talkie

ˇ         144 MHz AM Walkie-Talkie - YO3AVE

ˇ         2m PLL FM Transceiver - DC1YB

ˇ         20m CW Transceiver - DC1YB

ˇ         144 MHz 2-channels Walkie-Talkie - DC1YB

ˇ         7 MHz CW Transceiver - W7EL

ˇ         20m Bell-Ringer CW Transceiver - AA1TJ

ˇ         50 MHz FM Transceiver for Audio and Data

ˇ         80m CW QRP Transceiver

ˇ         10m SSB Transceiver

ˇ         20m SSB 50W Transceiver - YO3AVE

ˇ         10.1 MHz 2W Transceiver - DJ1ZB

ˇ         15m QRP 1.5W Transceiver - W9SCH

ˇ         20m 1.5V Low Supply Voltage Transceiver - DL2AVH

ˇ         20m Superheterodyne Transceiver - NN1G

ˇ         20m Two-Fer Transceiver - WU2J

ˇ         30m "38-Special" Superhet Transceiver - AC6AN

ˇ         40m 1.5W Rock-Steady Transceiver - K8IF

ˇ         40m DB-25 QRP Transceiver - WA5JAY

ˇ         40m "EverReady" Transceiver - WA6AHL

ˇ         40m "Forty-9er" Transceiver - N6KR

ˇ         40m Handbook Transceiver - WB6TMH

ˇ         40m QRP Transceiver - N4HCJ

ˇ         40m QRP Transceiver - W3TS

ˇ         80m-40m-30m Superhet Transceiver - NN1G

ˇ         80m CW-QSK Transceiver - NN1G

ˇ         80m One-Transistor CW Transceiver - WB3EEL

ˇ         80m SMD Transceiver - W1CFI

ˇ         HF QRP 1.5W Transceiver - KN1H

ˇ         HF "The-Phoenix" QRP Transceiver - W3TS

ˇ         30m QRP Transceiver - K8IF

ˇ         1.8 MHz QRP Transceiver - G3TXQ

ˇ         80m/160m Transceiver - G4ENA

ˇ         20m 5W SSB/CW Transceiver MFJ-9420

ˇ         40m / 20m RockMite CW Transceiver - K1SWL

ˇ         1.8MHz Transceiver - G3TXQ

ˇ         20m Transceiver - G4ENA

ˇ         2m AM Walkie-Talkie Fredbox - G3XBM

ˇ         10m CW Transceiver - G3XBM

ˇ         27 MHz 3xBJT's Walkie-Talkie

ˇ         27 MHz 4xBJT's Walkie-Talkie

ˇ         27 MHz AM 6W Transceiver

ˇ         27 MHz Saturn Walkie-Talkie

ˇ         80m QRP Transceiver - YC3LSB

ˇ         80m SSB Transceiver - YC3LSB

ˇ         40m Mizuho DC7d CW Transceiver

ˇ         40m Mizuho DC7x CW Transceiver

ˇ         80m Transceiver MKARS - G6ALU

ˇ         15m HiMite Transceiver - K1SWL

ˇ         40m SSB Transceiver - JG1EAD

ˇ         50 MHz AM Transceiver - JG1EAD

ˇ         144 MHz FM Transceiver - JG1EAD

ˇ         144 MHz SSB Transceiver - JG1EAD

ˇ         430 MHz AM Transceiver - JG1EAD

ˇ         3.5 MHz to 10 MHz Superheterodyne Receiver

ˇ         7 MHz Direct Conversion Receiver

ˇ         20m Direct Conversion Receiver

ˇ         27 MHz R/C Receiver

ˇ         80m/40m Direct Conversion Receiver

ˇ         80m Superheterodyne Receiver

ˇ         Aircraft Receiver 118 MHz to 136 MHz

ˇ         AM Superheterodyne Receiver with NE612

ˇ         Shortwave AM Receiver

ˇ         2 Bands Shortwave AM Receiver

ˇ         HF Receiver SSB Superheterodyne

ˇ         Receiver HF SSB CW Superheterodyne

ˇ         144 MHz SSB Receiver - W1VT

ˇ         Two-stages HF Regenerative Receiver

ˇ         80m/40m IQ Receiver - AK4AA

ˇ         40m Direct Conversion Receiver - VU2ESE

ˇ         1.8 MHz to 14.5MHz Direct Conversion Receiver

ˇ         432 MHz FM Receiver - DF2FQ

ˇ         HF Receiver - WN5Y

ˇ         144 MHz FM Receiver

ˇ         FM Receiver for Airband 137 MHz

ˇ         14.070 MHz PSK31 Receiver - DL6FAP

ˇ         20m PSK31 Receiver - DG2SK

ˇ         Ten-Tec 1253 Shortwave Receiver

ˇ         Direct Conversion Receiver with MOSFETs

ˇ         HF Direct Conversion Receiver - VU2UPX

ˇ         HF Receiver with MC3362 - VU2UPX

ˇ         40m Binaural I/Q Receiver - KK7B

ˇ         Two Regenerative Receivers

ˇ         40m SOP Receiver - N2CX

ˇ         Clasic40 Receiver - KK7B

ˇ         Herring HF Receiver - WA1LNQ

ˇ         Receiver for DRM - Digital Radio Mondiale - DL5MGD

ˇ         Receiver for 80m and 20m - OK2UGS

ˇ         Weather Receiver 137 MHz - F6BQU

ˇ         144 MHz FM Receiver - PU2XJE

ˇ         Simple VHF FM Receiver

ˇ         Regenerative FM Receiver

ˇ         80m SSB Super-80 Receiver - VK3YE

ˇ         VHF Receiver PLL - DF1FO

ˇ         Superregenerative HF Receiver

ˇ         Superregenerative VHF Receiver

ˇ         Receiver HF/VHF-AM/FM/SSB Grundig YB400

ˇ         30m "Dirty-Thirty" Receiver - VE7BPO

ˇ         FM Broadcast Receiver TDA7000

ˇ         General Coverage AM Receiver - ON6MU

ˇ         Direct Conversion Receiver AM-Immune - KD1JV

ˇ         Short-Wave AM Receiver - KD1JV

ˇ         3x2N2222 Short-Wave AM Receiver

ˇ         40m 3xFET Direct Conversion Receiver

ˇ         40m Software Defined Radio - PY2MG

ˇ         80m Direct Conversion Receiver - PA2OHH

ˇ         HF AM/SSB Receiver - PY2MG

ˇ         Short-Wave Regenerative Receiver - PA2OHH

ˇ         VHF FM Receiver - PY2MG

ˇ         CB Receiver TCA440

ˇ         20m SSB Receiver

ˇ         118 MHz to 136 MHz Aviation Band Receiver

ˇ         Superregenerative RX for 144-432-1296 MHz - F9HX

ˇ         FM Receiver with Strength-meter

ˇ         Economy Short-Wave Receiver

ˇ         2m AM Receiver

ˇ         20m Direct Conversion Receiver - W1VD

ˇ         40m AM/CW/SSB Regenerative Receiver

ˇ         80m Two CW/SSB Superheterodyne Receivers

ˇ         80m SSB/CW/AM Superheterodyne Receiver

ˇ         80m Receiver IF=9MHz

ˇ         144 MHz All-FET Direct Conversion Receiver

ˇ         144 MHz SSB/CW Direct Conversion Receiver

ˇ         144 MHz Superregenerative Receiver

ˇ         432 MHz SSB/AM Receiver - YO3AVE

ˇ         FM Direct Conversion Receiver

ˇ         PNP Shortwave Receiver

ˇ         Simplest Direct Conversion Receiver

ˇ         VHF Superregenerative Receiver

ˇ         HF MultiPig Receiver - W8DIZ

ˇ         0.3 MHz - 30 MHz SSB/AM Receiver - DC1YB

ˇ         40m Parametric-Regenerative Receiver - AA1TJ

ˇ         HF Simple Regenerative Receiver - N1TEV

ˇ         40m Direct Conversion Receiver - DL2YEO

ˇ         80m All-BJT's Direct Conversion Receiver

ˇ         30m SSB Superheterodyne Receiver

ˇ         40m CW-SSB Simple Superhet Receiver

ˇ         80m-40m Direct Concersion Receiver - VK3AWC

ˇ         All HF Bands Direct Conversion Receiver

ˇ         410 MHz - Superregenerative Receiver for Remote Keyless

ˇ         FM Broadcast Superregenerative Receiver - VK2ZAY

ˇ         Simplest Shortwave Receiver

ˇ         VHF Superregenerative Receiver - VK2ZAY

ˇ         136 MHz Airband Dual-Conversion Receiver

ˇ         FM / AM Superregenerative Receiver

ˇ         VHF Superregenerative Receiver with Squelch - N1TEV

ˇ         1 MHz - 30 MHz QRP Receiver - KD1JV

ˇ         14 MHz Simple Superhet Receiver - W7ZOI

ˇ         20m Two-Superhet's Receivers - K9AY

ˇ         40m Superhet Receiver with 74HC4053 - KD1JV

ˇ         40m CCS Superhet Receiver - WB0RMT

ˇ         40m "Tuna-Twin-Too" Receiver - KO4WX

ˇ         Shortwave "PipSqueak" Receiver - NA5N

ˇ         3 MHz - 5 MHz Cascade Regenerative Receiver - WD5HOH

ˇ         3 x Superregenerative Receivers - RSGB

ˇ         40m MRX-40 Receiver - K8IDN

ˇ         Multiband HF Direct Conversion Receiver - RSGB

ˇ         7 MHz Rock-Bending Receiver - WI5W

ˇ         HF MicroR2 SSB/CW Receiver

ˇ         HF DCR Polyphase Receiver - G0UPL

ˇ         AM Receiver with PLL - 4046

ˇ         Medium Wave Receiver for DX

ˇ         Short Wave AM Receiver with TCA440

ˇ         Regenerative Short-Wave Receiver - NA5N

ˇ         80m AM/CW/SSB Receiver - YC3LSB

ˇ         80m AM/SSB Receiver - YC3LSB

ˇ         2.5 MHz Receiver for OMA-2500 station

ˇ         FM Receiver with Auto-scan

ˇ         220 MHz to 400 MHz Air-band Scanner

ˇ         HF Regenerative Receiver with Dual-Gate MOSFET

ˇ         Simple FM Receiver with Audio Amplifier

ˇ         6m / 2m FM Receiver

ˇ         20m DCR with Active Filter

ˇ         80m / 40m DCR Receiver

ˇ         80m One-Stage-IF Superhet Receiver

ˇ         Active Aircraft AM Receiver

ˇ         FM Broadcast Superhet Receiver

ˇ         Public Service FM Receiver

ˇ         Short-Wave Superhet Receiver

ˇ         Very Low Frequency Whistler Receiver

ˇ         Single-Signal Direct Conversion Receiver - KK7B

Transmitters

Transverters and Converters

ˇ         10W 40m CW Transmitter

ˇ         2m Band Beacon

ˇ         Beacon for 144 MHz

ˇ         Beacon for VHF

ˇ         HF QRP CW Transmitter

ˇ         VHF Beacon

ˇ         Wireless AM Microphone

ˇ         X-tal VHF FM Transmitter

ˇ         7 MHz CW QRP Transmitter

ˇ         14 MHz CW QRP Transmitter

ˇ         145 MHz X-tal FM Transmitter

ˇ         27 MHz AM/FM Transmitter

ˇ         HF QRP CW Transmitter VXO - W7ZOI

ˇ         FM Audio Transmitter with Monitor

ˇ         0.5W FM Transmitter 88MHz-108MHz

ˇ         7 MHz 5W QRP Transmitter

ˇ         7 MHz 12W Transmitter - NB6M

ˇ         10m VXO QRP Transmitter - NB6M

ˇ         27 MHz 2W Transmitter

ˇ         40m 5W CW Transmitter - N1HFX

ˇ         75m Phasing SSB Exciter - WA7JHZ

ˇ         Miniature Tracking Transmitter

ˇ         4W PLL FM Transmitter - XQ5FOD

ˇ         20m 1W Transmitter - PA2OHH

ˇ         40m CW Transmitter - PY2MG

ˇ         HF SSB Exciter - KD1JV

ˇ         3 GHz Beacon - G4DDK

ˇ         5.7 GHz Beacon - F6BVA

ˇ         SHF Micro-beacon - F4BAY

ˇ         6m CW Transmitter - VE7GC

ˇ         1W HF CW Transmitter

ˇ         50 MHz QRP AM Transmitter

ˇ         80m-40m 6W CW Transmitter

ˇ         80m Beacon

ˇ         144 MHz 1W FM Transmitter

ˇ         144 MHz AM/FM VFO Controlled Transmitter

ˇ         144 MHz Low Power Beacon - YO3AVE

ˇ         432 MHz CW Transmitter

ˇ         432 MHz QRP FM Transmitter

ˇ         1296 MHz Simple Transmitter

ˇ         QRP Transmitters

ˇ         1.65 MHz QRP AM Transmitter

ˇ         88 MHz - 108 MHz FM Transmitter

ˇ         HF Low-Power AM Transmitter

ˇ         88 MHz - 108 MHz X-tal controlled 1W FM Transmitter

ˇ         30m CW Transmitter

ˇ         80m CW VFO Transmitter

ˇ         VLF 15W Transmitter

ˇ         9 MHz SSB Modulator

ˇ         88 MHz - 108 MHz 0.5W FM Transmitter

ˇ         High-Quality AM Transmitter

ˇ         27 MHz 4W AM Transmitter

ˇ         2W Two-Bands Transmitter - VK3XU

ˇ         7 MHz QRP VFO Transmitter - W7ZOI

ˇ         14 MHz 1W VFO Transmitter - W8PJ

ˇ         40m QRP CW Transmitter - WB8VGE

ˇ         40m The-QRP-Key Transmitter - WA8MCQ

ˇ         All-Bands VXO Transmitter - KN1H

ˇ         2m Low-Power CW Beacon

ˇ         9 MHz SSB Modulator Phasing-Method - RSGB

ˇ         SSB Modulators Filter-Method - RSGB

ˇ         88 MHz - 108 MHz 25mW FM Transmitter

ˇ         88 MHz - 108 MHz 20W FM Transmitter

ˇ         40m MicroT2 SSB/CW Transmitter

ˇ         HF MKII All-Band CW Transmitter

ˇ         88 MHz - 108 MHz 20W PA - ON6MU

ˇ         80m Fox Beacon

ˇ         AM Broadcast mini-Transmitter

ˇ         SSB Generator - JG1EAD

ˇ         1.3 GHz Transverter - DB9LN / DB6NT

ˇ         2.3 GHz to 144 MHz Transverter - DB6NT

ˇ         5.7 GHz Transverter - DB6NT

ˇ         10 GHz to 144 MHz Transverter - DB6NT

ˇ         50 MHz Transverter - OE9PMJ

ˇ         144 MHz to 28 MHz RX Converter MOS

ˇ         144 MHz to 28 MHz RX Converter FET

ˇ         VHF to 1.3 GHz up-converter

ˇ         1296 MHz to144 MHz Transverter - F5LGJ

ˇ         10 GHz Transverter

ˇ         70 MHz to 28 MHz Transverter - OZ2M

ˇ         No-Tune Transverter 1.3 GHz to 144 MHz - KK7B

ˇ         No-Tune Transverter 2304 MHz to 144 MHz - W8NLC

ˇ         Javornik 144 MHz to 14 MHz Transverter - S53WW

ˇ         50 MHz junk-box converter - WA3ENK

ˇ         50 MHz to 28 MHz Transverter - DK7ZB

ˇ         50 MHz to 28 MHz simple Converter

ˇ         144 MHz to 28 MHz Transverter

ˇ         Very Low Frequency Converter 0-250 kHz to 3.5 MHz

ˇ         UHF to VHF TV Converter

ˇ         144 MHz to 28 MHz Receive Converter - N0GZ

ˇ         1296 MHz Transverter - W1GHZ

ˇ         144 MHz to 28MHz Transverter - LT2S

ˇ         23cm to 70cm Transverter - I2SG

ˇ         144 MHz to 2.4 GHz Upconverter

ˇ         1.3 GHz to 144 MHz Transverter - OE9PMJ

ˇ         2.3 GHz Transverter - DC8UG

ˇ         5.7 GHz ATV Converter - DL1IN

ˇ         70 MHz to 21 MHz Transverter - DF2FQ

ˇ         2.32 GHz to 144 MHz Converter - DL5NEG

ˇ         40m to 11m Transverter - PY2MG

ˇ         50 MHz to 28 MHz RX Converter - PY2MG

ˇ         All-Bands HF to 9 MHz IF Transverter - YO3DAC/YO3BAL

ˇ         144 MHz to 14 MHz Transverter - SM0VPO

ˇ         2.3 GHz ATV Upconverter - F1HPR

ˇ         2.3 GHz to 432 MHz Converter - DL5NEG

ˇ         144 MHz to 28 MHz Transverter - WA6CDR

ˇ         868.3 MHz to 144 MHz Transverter - F1JGP

ˇ         1296 MHz to 144 MHz Transverter - F1OPA

ˇ         0-550 kHz Very Low Frequency Converter

ˇ         1.3 GHz ATV Downconverter

ˇ         1.8 MHz to 28 MHz Transverter - YO2IS

ˇ         24 MHz to 7 MHz Receive Converter

ˇ         28 MHz to 432 MHz Linear Up-Converter

ˇ         144 MHz to 14 MHz Transverter

ˇ         144 MHz to 28 MHz RX Converter - YO3BAL / YO3DAC

ˇ         144 MHz to 28 MHz Converter

ˇ         2m to 10m RX Converter

ˇ         144 MHz to 1296MHz Up-Converter

ˇ         432 MHz to 28 MHz RX Converter

ˇ         432 MHz to 50 MHz Transverter

ˇ         432 MHz to 144 MHz RX Converter - YO3BAL

ˇ         432 MHz to 144 MHz Downconverter

ˇ         432 MHz to 144 MHz Transverter

ˇ         1296 MHz to 144 MHz Receive Converter

ˇ         28 MHz to 50 MHz Transverter - RSGB

ˇ         136 kHz to 4.137 MHz Transverter - RSGB

ˇ         50 MHz to 27 MHz Transverter - YC3LSB

ˇ         80m to 40m Transverter - YC3LSB

ˇ         27 MHz to Short Waves Converter

ˇ         AM Air-Band to Short Waves RX Converter

RF Power Amplifiers

High Frequency Low Noise Amplifiers

ˇ         HF 10W Power Amplifier

ˇ         50MHz 100W Power Amplifier

ˇ         50MHz 350W Power Amplifier 2xBLX15

ˇ         3 MHz to 30 MHz 80W Power Amplifier

ˇ         144 MHz 125W Power Amplifier

ˇ         HF 60W Power Amplifier IRF840

ˇ         HF 10W to 200W Class E/F Power Amplifier

ˇ         14 MHz 20W Linear Power Amplifier

ˇ         144 MHz 100W Power Amplifier

ˇ         144 MHz 180W Power Amplifier

ˇ         432 MHz 50W Power Amplifier

ˇ         432 MHz 110W Power Amplifier

ˇ         144 MHz 75W PA with RX preamplifier

ˇ         144 MHz 110W Linear PA

ˇ         28 MHz 150W Power Amplifier

ˇ         144 MHz 200W PA with RX preamplifier

ˇ         HF PA's with MOSFETs - DK7ZB

ˇ         50 MHz 35W PA with MOSFET - DJ9FG

ˇ         HF 40W PA with MOSFET - WA2EBY

ˇ         88-108 MHz 40W FM Power Amplifier

ˇ         144 MHz 100W Push-Pull PA - YU1AW

ˇ         UHF 25W Power Amplifier

ˇ         VHF 30W Power Amplifier

ˇ         HF 10W MOSFET PA - LU8EHA

ˇ         HF 8W Power Amplifier - F6BQU

ˇ         80m 5W Power Amplifier - S57NAN

ˇ         2304 MHz 2.5W Power Amplifier - WA3JUF

ˇ         50 MHz 350W Power Amplifier - 2xBLX15

ˇ         3.4 GHz 3W Power Amplifier - DB6NT

ˇ         3.4 GHz 7W Power Amplifier - DB6NT

ˇ         10 GHz 4W Power Amplifier - DB6NT

ˇ         1296 MHz 50W Power Amplifier - DJ1EE

ˇ         70 MHz 160W Power Amplifier - GI0GDP

ˇ         144 MHz 160W Power Amplifier

ˇ         144 MHz 100W Linear Power Amplifier

ˇ         HF 7W Power Amplifier - ON6MU

ˇ         50 MHz 150W Power Amplifier 1xBLX15

ˇ         144 MHz 100W Power Amplifier 2xBLY94

ˇ         40m 10W Power Amplifier - PY2MG

ˇ         80m/40m 30W Power Amplifier - PY2MG

ˇ         1.6 MHz - 30 MHz 300W Power Amplifier 2xBLF177

ˇ         14 MHz 25W 2x MOSFET Power Amplifier - F6BCU

ˇ         28 MHz 80W SSB Power Amplifier BLF246

ˇ         88 MHz - 108 MHz 15W FM MOSFET Power Amplifier

ˇ         100 MHz - 450 MHz 250W Power Amplifier BLF548

ˇ         27 MHz 1kW Low Cost MOSFET Power Amplifier

ˇ         27 MHz 500W Class-E MOSFET Power Amplifier

ˇ         50 MHz 300W Linear MOSFET Power Amplifier

ˇ         88 MHz - 108 MHz 300W MOSFET Power Amplifier

ˇ         144 MHz 50W Power Amplifier - M0UKD

ˇ         2.3 GHz 1.5W Power Amplifier - F1JGP

ˇ         2.3 GHz 4W Power Amplifier - F5EFD

ˇ         2.3 GHz 10W Power Amplifier - F1JGP

ˇ         5.7 GHz 0.5W Power Amplifier - F1HPR

ˇ         5.7 GHz 4W Power Amplifier - F1JGP

ˇ         10 GHz 1W Power Amplifier - F1JGP

ˇ         24 GHz 80mW Power Amplifier - F1GHB

ˇ         1.3 GHz 1W Power Amplifier - IW2BC

ˇ         HF 600W MOSFET Power Amplifier

ˇ         HF 180W Power Amplifier

ˇ         1 MHz to 30 MHz 5W Power Amplifier

ˇ         1.8 MHz to 30 MHz 15W Power Amplifier - W8DIZ

ˇ         10 MHz to 90 MHz 1kW MOSFET Power Amplifier

ˇ         225 MHZ 450 MHz 10W Power Amplifier

ˇ         70 MHz 150W Power Amplifier - YU1AW

ˇ         135 MHz - 175 MHz 7W Power Amplifier

ˇ         135 MHz - 175 MHz 15W Power Amplifier

ˇ         400 MHz - 520 MHz 8W Power Amplifier

ˇ         1.78 GHz Class-F Power Amplifier

ˇ         1 GHz Inverse-Class-F Power Amplifier

ˇ         13.56 MHz 400W Class-E Power Amplifier

ˇ         27 MHz 500W Class-E Power Amplifier

ˇ         144 MHz 55W Class-E Power Amplifier

ˇ         Cascode CMOS Class-E Power Amplifiers

ˇ         Class-F LDMOS Power Amplifier

ˇ         Equivalent Circuits Class-E PA

ˇ         VHF Class-E Power Amplifier

ˇ         2 MHz - 50 MHz 1kW MOSFET PAs

ˇ         30 MHz 300W MOSFET Power Amplifier

ˇ         VHF 150W MOSFET Power Amplifier

ˇ         VHF-UHF Broadband 100W Power Amplifier

ˇ         VHF 80W FM Power Amplifier

ˇ         HF 10W Power Amplifier - KD1JV

ˇ         1 MHz - 30 MHz 150W Linear Power Amplifier

ˇ         28 MHz 100W Linear Power Amplifier

ˇ         7 MHz 200W Class E/F MOSFET PA - KN6EK

ˇ         HF 30W Class-D Linear Power Amplifier - OH2GF

ˇ         1450 MHz - 1550 MHz 45W LDMOS Power Amplifier

ˇ         HF 250W LDMOS Power Amplifier

ˇ         1.8MHz to 10.1MHz 5W MOSFET Power Amplifier

ˇ         50MHZ 16W MOSFET Power Amplifier

ˇ         88 MHz - 108 MHz 175W Power Amplifier

ˇ         HF 100W Power Amplifier - IRF520

ˇ         80m 8W Linear PA - YC3LSB

ˇ         27 MHz 4W Power Amplifier

ˇ         1.8 MHz to 30 MHz 10W with IRF510 Power Amplifier

ˇ         1.8 MHz to 30 MHz 10W MOSFET Power Amplifier

ˇ         2.4 GHz 0.5W GaAs FET Power Amplifier

ˇ         432 MHz 40W DMOS Push-Pull Power Amplifier

ˇ         432 MHz 125W DMOS Push-Pull Power Amplifier

ˇ         500 MHz 15W DMOS Power Amplifier

ˇ         VHF 150W DMOS Power Amplifier

ˇ         VHF 300W DMOS Push-Pull Power Amplifier

ˇ         14 MHz 100W 2SK413-MOSFET PA - RSGB

ˇ         2.4 GHz LNA 30dB-Gain 0.6dB-NF

ˇ         10 GHz Low Noise Amplifier

ˇ         144 MHz GaAs LNA

ˇ         144 MHz LNA - YU1AW

ˇ         432 MHz LNA MGF1402

ˇ         432 MHz LNA - YU1AW

ˇ         950 MHz to 2150 MHz LNA

ˇ         1296 MHz Low Noise Amplifier

ˇ         Antenna Preamplifier 100 kHz to 220 MHz

ˇ         UHF TV Preamplifier 25dB Gain

ˇ         LNA for UHF Band BFP540

ˇ         High IP3 HF LNA

ˇ         L-band Low Noise Amplifier

ˇ         950 MHz - 2150 MHz LNB

ˇ         HF Preselector - DL2JDN

ˇ         3.5 GHz PHEMT LNA 0.9dB NF

ˇ         10 GHz GaAs LNA - N1BWT

ˇ         24 GHz HEMT LNA - WA3RMX

ˇ         432 MHz GaAs LNA - N6CA

ˇ         1.3 GHz LNA - PE1BVJ

ˇ         2.4 GHz LNA +40dBm OIP3

ˇ         100 MHz to 500 MHz LNA

ˇ         800 MHz to 1000 MHz BJT LNA

ˇ         900 MHz BJT LNA

ˇ         900 MHz High Linearity pHEMT LNA

ˇ         2.4 GHz LNA, 1.1dB-NF, +10dBm-IP3

ˇ         2.4 GHz LNA 0.6dB-NF, 15dB-Gain

ˇ         5.7 GHz LNA 1.2dB-NF, 15dB-Gain

ˇ         50 MHz Low Noise FET Preamplifier - W1FB

ˇ         432 MHz pHEMT LNA 0.4dB-NF - JH0WJF

ˇ         HF High Dynamic Range LNA

ˇ         VHF-UHF GaAs LNA - W3KKC

ˇ         88MHz-108MHz Cascode LNA

ˇ         Short-Wave Tunable Preamplifier

ˇ         2.4 GHz 0.5dB-NF pHEMT LNA

ˇ         400 MHz LNA BFG540

ˇ         Wideband 432 MHz to 1296MHz pHEMT LNA - G0MRF

ˇ         900 MHz LNA BFG505

ˇ         Wideband pHEMT LNA - W6PQL

ˇ         1296 MHz Very Low Noise Amplifier - G4DDK

ˇ         2304 MHz Very Low Noise Amplifier - G4DDK

ˇ         1296 MHz BJT Low Noise Amplifier - WA6UAM

ˇ         2.4 GHz LNA - F5JGP

ˇ         1296 MHz LNA - F1JGP

ˇ         70 MHz to 560 MHz Wideband High-Dynamic-Range LNA

ˇ         100 kHz to 600 MHz Wideband Linear Amplifier

ˇ         HF Receive Loop Antenna Preamplifier

ˇ         1 MHz to 100 MHz Dual-Stage LNA

ˇ         40 MHz to 800 MHz Gain=28dB LNA

ˇ         144 MHz BF981 LNA

ˇ         144 MHz Tuned LNA

ˇ         400 MHz to 800 MHz Gain=30dB LNA

ˇ         All-Bands Preselector

ˇ         1.3 GHz GaAs-FET Low Noise Preamplifier - OH3MCK

ˇ         GPS 1.575 GHz, G=18dB, NF=1.3dB LNA

ˇ         2140 MHz G=15dB, NF=1.5dB GaAs LNA

ˇ         1 MHz - 30 MHz Ultra High Dynamic Range LNA - YU1AW

ˇ         10.24 GHz GaAs LNA's

ˇ         900 MHz G=22dB, NF=1.9dB, BJT LNA

ˇ         50 MHz Dual-Gate LNA - OH2AUE

ˇ         1.5 MHz - 50 MHz LNA+PA - YU1LM

ˇ         900 MHz Integrated Cascode LNA

ˇ         2.4 GHz, NF=1.5dB, G=14dB, HJ-FET LNA

ˇ         L-Band pHEMT LNA

ˇ         Voltage Probe Antenna Preamplifier - VE7BPO

ˇ         High-Dynamic Range Preamplifier - G3SBI

ˇ         1.8 MHz to 54 MHz Preselector MFJ-1040

ˇ         Medium Wave Active Antenna

ˇ         10 kHz - 30 MHz Antenna Preamplifier

ˇ         HF Active Loop Antenna

ˇ         1 GHz to 8 GHz Cascode LNA

ˇ         2 GHz LNA with Tunable Image Reject Filter

ˇ         7 GHz Low Noise Amplifier

ˇ         40 MHz to 800 MHz CATV LNA

ˇ         CATV Line-out Amplifier

ˇ         VHF Active Antenna

ˇ         Broadband J-FET Differential Amplifier

ˇ         144 MHz MOS and FET Equiv LNA - RSGB

ˇ         Dipole LNA without Balun

ˇ         FET-BJT Cascode LNA

ˇ         High-IP3 HF LNA - RSGB

ˇ         50 MHz BFPxxx LNA - YU1AW

ˇ         70 MHz BFPxxx LNA - YU1AW

ˇ         144 MHz BFPxxx LNA - YU1AW

ˇ         144 MHz Dual-Gate LNA - YU1AW

ˇ         432 MHz Dual-Gate LNA - YU1AW

Oscillators

RF Signal Sources and Multipliers

ˇ         5 MHz to 5.4 MHz Variable Frequency Oscillator

ˇ         6 MHz to 6.35 MHz Variable Frequency Oscillator

ˇ         7 MHz to 7.3 MHz Variable Frequency Oscillator

ˇ         30 MHz to 200 MHz VCO

ˇ         50 MHz to 150 MHz Crystal Oscillator

ˇ         50 MHz Crystal Oscillator

ˇ         100 MHz Crystal Oscillator

ˇ         100 MHz VCXO

ˇ         455 kHz Ceramic Filter BFO

ˇ         Butler Crystal Oscillator

ˇ         Vackar VFO G3PDM

ˇ         High Power VFO - K7HFD

ˇ         Low Voltage Crystal Oscillator

ˇ         Parallel Mode Crystal Oscillator

ˇ         Series Mode Crystal Oscillator

ˇ         Variable Crystal Oscillator VXO

ˇ         750 MHz Push-Push Oscillator

ˇ         Butler Overtone Crystal Oscillator

ˇ         High Overtone Crystal Oscillator

ˇ         3 MHz to 30 MHz VCXO

ˇ         Low Noise Differential VFO - 5 MHz to 5.5 MHz

ˇ         VHF Oven Crystal Oscillator - W6PQL

ˇ         1.3 GHz VCO with Emitter Noise Feedback

ˇ         2 GHz to 4GHz VCO

ˇ         220 MHz Low Noise Cascode Oscillator

ˇ         600 MHz to 2.2GHz VCO

ˇ         800 MHz to 2.2GHz Push-Pull VCO

ˇ         1 GHz Differential VCO with Amplitude Control

ˇ         10 MHz VXO

ˇ         455 kHz Beat Frequency Oscillator

ˇ         Crystal Oscillators Types

ˇ         VXOs Types and Schematics

ˇ         750 MHz to 1250 MHz VCO

ˇ         High Performance VHF Overtone Oscillator - GW4DGU

ˇ         Octave VCO with active bias

ˇ         200 MHz to 400 MHz VCO

ˇ         1700 MHz to 1950 MHz VCO

ˇ         Very Low Phase Noise Crystal Oscillator - Wenzel

ˇ         1 GHz Very Low Phase Noise VCO

ˇ         74 MHz to 105 MHz Low Noise VCO

ˇ         100 MHz Low Phase Noise VCXO

ˇ         125 MHz Very Low Phase Noise Oscillator - ADI

ˇ         600 MHz to 1200 MHz Low Phase Noise VCO

ˇ         18 MHz Stable and Constant Amplitude LO

ˇ         1100 MHz to 1350 MHz VCO

ˇ         70 MHz to 210 MHz VCO with Dual-Gate MOSFET

ˇ         5 MHz to 6 MHz VFO - VE7CA

ˇ         7 MHz VXO - NB6M

ˇ         14 MHz VXO - NB6M

ˇ         10 GHz DRO Oscillator

ˇ         180 MHz X-tal Oscillator - F1ANH

ˇ         5 MHz X-tal Coupled-Resonator LO

ˇ         10 MHz Third-Overtone Pierce LO

ˇ         10 MHz X-tal Cascode Oscillator

ˇ         27 MHz Third-Overtone with TTL-output LO

ˇ         40 MHz to 70 MHz VCO

ˇ         42 MHz to 72 MHz VCO

ˇ         100 MHz Fifth-Overtone Butler VCXO

ˇ         110 MHz to 210 MHz VCO ESM500-Receiver

ˇ         118 MHz to 198 MHz FM-Modulated LO

ˇ         160 MHz to 260 MHz VCO ESV-Receiver

ˇ         260 MHz to 520 MHz VCO HP8662A-SigGen

ˇ         380 MHz to 520 MHz VCO

ˇ         450 MHz Quarter-Wavelength VCO

ˇ         567 MHz SAW Oscillator

ˇ         800 MHz Very Low Phase Noise VCO

ˇ         Ceramic Resonator VCO

ˇ         HF Multiband VCO EK070-Receiver

ˇ         HF Multiband VCO ESH3-Receiver

ˇ         Low Phase Noise Push-Push VCO

ˇ         Third-Overtone VCXO with AGC

ˇ         2.4 GHz to 2.8 GHz VCO

ˇ         10.5 GHz DRO

ˇ         102 MHz VCXO

ˇ         Cavity-Tuned Oscillator

ˇ         Butler X-tal Oscillators

ˇ         DC-Switched X-tal Oscillator

ˇ         FM-Modulated X-tal Oscillator

ˇ         55.2 MHz VCXO - KA7OEI

ˇ         1.93 MHz to 1.98 MHz Very Stable VFO - W8DIZ

ˇ         5.05 MHz - 5.075 MHz Clapp VFO

ˇ         1 MHz to 5 MHz Goral Type Oscillator

ˇ         100 MHz Dual-Gate MOSFET Oscillator

ˇ         Triple Beat Frequency Oscillator

ˇ         4.9 MHz to 5.5 MHz VFO - TS520

ˇ         5.225 MHz - 5.575 MHz Franklin Stable VFO

ˇ         7 MHz QSK VFO - NN1G

ˇ         Widerange VCXO W7ZOI

ˇ         5 MHz VXO with ALC

ˇ         21 MHz VCXO - G3MEV

ˇ         Variable Crystal Resonator Oscillator - K2BLA

ˇ         1.3 GHz Low Phase Noise Cavity Stabilized VCO

ˇ         6 GHz DRO

ˇ         10 MHz Very Low Phase Noise X-tal Oscillator

ˇ         40 MHz to 80 MHz Low Phase Noise VCO

ˇ         72 MHz to 76 MHz VCO - NA5N

ˇ         100 MHz Very Low Phase Noise VCXO

ˇ         455 kHz PLL Variable BFO

ˇ         Microwave SAW VCO

ˇ         3 MHz to 8 MHz VCO

ˇ         High Stability Time Base Oscillator

ˇ         WARC VFO - G3TSO

ˇ         40 MHz Overtone Oscillator - PA0WSP

ˇ         133.6 MHz VXO

ˇ         No-Tune Overtone XO - I4BER

ˇ         5th Overtone X-tal Oscillator - Wenzel

ˇ         10 MHz Overtone X-tal Oscillator

ˇ         2.4 GHz Signal Source - W6PQL

ˇ         900 MHz Signal Source - W6PQL

ˇ         1104 MHz Signal Source - W6PQL

ˇ         1296 MHz Signal Spurce - W6PQL

ˇ         116 MHz High Level X-tal LO

ˇ         10 GHz LO Multiplier - N1BWT

ˇ         404 MHz LO - AA5C

ˇ         12 GHz Signal Source - DB6NT

ˇ         2808 MHz Signal Source - DC0DA

ˇ         3256 MHz Signal Source - DB6NT

ˇ         5616 MHz Signal Source - DB6NT

ˇ         10223 MHz Signal Source - DL1RQ

ˇ         10368 MHz Signal Source - DJ6JJ

ˇ         800 MHz to 2.4 GHz Frequency Tripler

ˇ         Frequency Multiplier 10 MHz to 30 MHz

ˇ         432 MHz to 1296MHz Frequency Tripler

ˇ         Active Frequency Quadrupler

ˇ         1.3 GHz Signal Generator - W6PQL

ˇ         2.4 GHz Signal Generator - W6PQL

ˇ         1152 MHz PLL Signal Source - OZ1GDS

ˇ         1152 MHz Signal Source - F6BCU

ˇ         1150/1152 MHz Signal Source

ˇ         1152 MHz Signal Source - G4DDK

ˇ         422 MHz to 1267 MHz Diode Frequency Tripler

ˇ         1296 MHz Signal Source - W6FZJ

ˇ         1296 MHz Weaksignal Noise Source - WA6UAM

ˇ         L-band Signal Source - N6TX

ˇ         1.42 GHz to 5.7 GHz Multiplier - F1HPR

ˇ         2.5 GHz Signal Source - G4DDK

ˇ         2 GHz to 12 GHz Multiplier - F1OPA

ˇ         9.5 GHz Signal Source - F6BVA

ˇ         10.5 GHz Signal Source - F6BVA

ˇ         12 GHz Signal Source - F6BVA

ˇ         130 MHz to 6 GHz Multiplier - F1JGP

ˇ         1296 MHz to 10368 MHz Multiplier - F6BVA

ˇ         C-band Signal Source - F1JGP

ˇ         100 MHz to 1700 MHz Frequency Multiplier

ˇ         902 MHz Signal Source

ˇ         200 MHz to 600 MHz Frequency Tripler

ˇ         800 MHz to 2400 MHz Frequency Tripler

ˇ         Varactor Tripler

ˇ         0.5 MHz to 110 MHz AM/FM Signal Generator

ˇ         Simple 2.4 GHz Signal Source

ˇ         1 GHz to 1.3 GHz Signal Source - G4DDK

ˇ         Frequency Multipliers Types

ˇ         100 MHz - 500 MHz Multiplier

ˇ         432 MHz - 1296 MHz Varactor Tripler - VK2TDN

ˇ         No-Processor DDS - G3XBM

ˇ         1 kHz to 9 MHz Sinusoidal Signal Generator

ˇ         1 kHz to 999 kHz PLL Signal Generator

ˇ         2 MHz to 2 GHz AM Harmonics Generator

ˇ         9 MHz to 1.3 GHz Harmonics Generator

ˇ         44.4 MHz - 45.1 MHz PLL VFO - PA0KSB

ˇ         455 kHz SSB Generator

 

 

VFO Stabilizers

ˇ         One chip VFO Stabilizer - G0UPL

ˇ         VFO Stabilizer - PY2MG

ˇ         VFO Stabilizer - PA0FRI

ˇ         Huff-and-Puff VFO Stabilizer - WN5Y

ˇ         VFO Stabilizer - PA0CMU

ˇ         2 x Huff-and-Puff VFO Stabilizers - RSGB

ˇ         40 MHz to 70 MHz 3-band Frequency Stabilizer - DC4KU

ˇ         1 MHz to 100 MHz VFO Stabilizer

ˇ         VFO Stabilizer - PA0KSB

 

RF Switch / Attenuator

RF Mixers

ˇ         IF Filters Switching Circuit

ˇ         TX/RX RF Switch FET

ˇ         TX/RX RF Switch PIN

ˇ         RF Sensing TX/RX Switch

ˇ         RX/TX Quarter-Wave PIN Switch

ˇ         PIN Attenuator BAR61

ˇ         Variable PIN Attenuator 1dB to 20dB

ˇ         AGC with PIN Attenuator

ˇ         4xPIN Diodes Wideband Switch

ˇ         Modulator-Demodulator using PIN Diodes

ˇ         Phase Shifter using PIN Diodes

ˇ         RF Attenuator Types using PIN Diodes

ˇ         RF Switch Types using PIN Diodes

ˇ         AGC PIN Attenuator

ˇ         Automatic Antenna Attenualtor 45dB range - RSGB

ˇ         HF 25W PIN Antenna Switch

ˇ         All Transfer PIN Switches

ˇ         PIN Diode Limiter

ˇ         SPMT PIN Switches

ˇ         T/R Switch with Lumped Transmission Line

 

ˇ         Doubly Balanced Mixer MC1496

ˇ         Mixer Diplexer

ˇ         Dual MOSFET Mixer

ˇ         Microwave Mixers

ˇ         Stripline Quadrature Microwave Mixers

ˇ         High IP3 Mixer +40dBm - IK4AUY

ˇ         1296 MHz Diode Mixer - WA6UAM

ˇ         Dual-FET HF Mixer

ˇ         High Dynamic Range HF Mixer

ˇ         High IP3 (33dBm) BJT Mixer

ˇ         900 MHz BJT Gilbert Mixer

ˇ         HF Sub-Harmonic Mixer

ˇ         1152-10368-24192 MHz Harmonic Mixer

ˇ         Microwave Harmonic Mixer

ˇ         1296 MHz DBM with ferrite balun - WA6UAM

ˇ         1296 MHz DBM with coaxial balun - WA6UAM

ˇ         Microwave Coaxial Diode Mixers

ˇ         Distribute Diode Single-Balanced Narrowband Hybrid Mixer

ˇ         Single Schottky Diode Mixer

ˇ         Two-BJT Product Detector

ˇ         Dual-Gate MOSFET Product Detector

ˇ         2.4 GHz Microstrip Harmonic Mixer

ˇ         Double Balanced BJT Mixer - JG1EAD

ATV Transmitters/Modulators

RF Test Circuits

ˇ         Audio/Video Transmitter

ˇ         AM TV Transmitter

ˇ         23cm ATV FM Transmitter

ˇ         A-V UHF TV Modulator

ˇ         Crystal TV Video Modulator

ˇ         TV Audio-Video Transmitter

ˇ         Simple TV Video Modulator

ˇ         TV Modulator

ˇ         A-V Transmitter - ZP5ZDM

ˇ         A-V VHF Transmitter

ˇ         FM ATV Receiver

ˇ         UHF A-V 1W Transmitter

ˇ         1296 MHz FM ATV Transmitter - I2ROM

ˇ         ATV FM Receiver-Demodulator

ˇ         470 MHZ PLL FM Video Demodulator

ˇ         Two ATV FM PLL Demodulators

ˇ         432 MHz ATV AM Transmitter

ˇ         439 MHz ATV AM Transmitter

ˇ         902 MHz PLL FM ATV Transmitter

ˇ         1296 MHz 300mW FM ATV Transmitter

ˇ         1296 MHz AM ATV Transmitter

ˇ         1296 MHz FM ATV Transmitter - F3YX

ˇ         UHF 2W AM ATV Transmitter

ˇ         UHF 5W AM ATV Transmitter

ˇ         1296 MHz PLL controlled FM ATV Transmitter - N9ZIA

Filters

Baluns

ˇ         Active Baluns - Differential to Single Ended

ˇ         Active Baluns - Single Ended to Differential

ˇ         Balun Transformers

ˇ         433 MHz Lumped Components Balun

ˇ         Broadband Transformers

ˇ         Guanella 4:1 Current Balun

ˇ         4:1 Broadband Transformers

Couplers / Splitters / Isolators

ˇ         Narrowband Coupler from Wilkinson Divider

ˇ         N-way Wilkinson Splitter

ˇ         Wilkinson Divider Versions

 

ˇ         Capacitance Meter

ˇ         Field Strength Meter LM324

ˇ         HF Q-meter VK5JST

ˇ         Antenna Analyzer - F6BQU

ˇ         RF Power Calibrator

ˇ         VHF Wattmeter

ˇ         88 MHz - 960 MHz Antenna Analyzer

ˇ         LED RF Power Meter - N9ZIA

ˇ         Return Loss Bridge

ˇ         Return Loss Bridge with AD8307

ˇ         HF SWR Bridge

ˇ         Grid Dip Meter 2 MHz - 20 MHz

ˇ         Field Strength Meter 3 Levels

ˇ         BandScope for 2m Band

ˇ         Lightening Detector

ˇ         3-Digits Dip Meter

ˇ         Calibrated Noise Source

ˇ         Capacitance Meter using DVM

ˇ         Inductance Meter using DVM

ˇ         High-Impedance RF Probe

ˇ         DC to 500 MHz Log Detector/Amplifier - DJ1ES

ˇ         L-C-R Bridge - G3BIK

ˇ         Phase Meter

ˇ         Inductance Meter - VK5BR

ˇ         L/C Meter - IZ7ATH

ˇ         FM Deviation Meter

ˇ         Flicker-Noise Generator - Wenzel

ˇ         2.4 GHz mW Power Meter - F1HDD

ˇ         Simple Crystal Tester - F5JTZ

ˇ         Inductance Meter - N5ESE

ˇ         Magnetic Field Meter

ˇ         RF dBu Meter

ˇ         Two chips LED Frequency Counter - PA2OHH

ˇ         0-99 kHz Frequency Counter - G0UPL

ˇ         LED SWR/Power meter - PY2MG  

ˇ         Electro-Magnetic Waves Detector

ˇ         Long-Wave Lightening Detector

ˇ         Cable Reflection Tester - N9ZIA

ˇ         TDR Circuit and Signals - T.Engdhal

ˇ         1 MHz to 1 GHz LED Absorption Meter - GW1TDV

ˇ         S9 HF Signal Generator

ˇ         Antenna Noise Bridge

ˇ         Audio Filter Analyzer

ˇ         True Linear RF Power Detector

ˇ         Grid Dip Meter 3.5 MHz to 110 MHz

ˇ         1.6 MHz to 150 MHz Modulated Grid-Dip Meter

ˇ         Five Grid-Dip Meters

ˇ         30 kHz to 30 MHz Sinusoidal Signal Generator

ˇ         Capacimeter using NE555

ˇ         0-1uF Capacimeter

ˇ         Coil Short-Circuit Detector

ˇ         Fonometer

ˇ         All-BJTs L-C Meter

ˇ         VHF FM Signal Generator

ˇ         Sweeper for 455 kHz IF

ˇ         500 kHz to 3 GHz LED Field-Strength Meter

ˇ         2xBJT Capacimeter

ˇ         Varactor Capacimeter

ˇ         Automatic VSWR and Power Meter - W0INK

ˇ         RF Sweeper - VK2ZAY

ˇ         Very Low Frequency Survey Probe - VK2ZAY

ˇ         1 MHz to 30 MHz Noise Source - G1HSM

ˇ         Capacimeter with 2xNE555 - WA8MCQ

ˇ         Dual-LED SWR Indicator for QRP

ˇ         HF In-Line Return Loss and Power Meter - N2PK

ˇ         SWR Bridge Tuner "Rainbow" - N2CX

ˇ         Spectrum Analyzer on the Oscilloscope

ˇ         Grid-Dip Meter with Digital Display

ˇ         Marker Generator - KB1MW

ˇ         Micro-Wattmeter - W7DB

ˇ         HF Antenna Tuner with VSWR-meter

ˇ         Sweep Generator - NA5N

ˇ         Simple Function Generator

ˇ         Optical SWR meter

ˇ         Glitch Detector

ˇ         Satellite Finder

ˇ         Electrostatic Detector

ˇ         1nF to 100uF Capacimeter

ˇ         10 Hz to100 kHz Frequency-to-Voltage Converter

ˇ         100 kHz to 30 MHz RF Probe with Detector Monitor

ˇ         100 MHz Oscilloscope Probe

ˇ         L/C meter multirange

ˇ         VHF LC Resonance Indicator

ˇ         Harmonics Detector - G3JGO

ˇ         Lighting Storm Monitor

ˇ         Sudden Ionospheric Disturbance Receiver

Power Supply

Audio Circuits

ˇ         DC Protection Circuits

ˇ         Overvoltage Protection

ˇ         Power Supply 13.8V/20A

ˇ         12V Battery Charger

ˇ         13.8V Float-Charging Power Supply

ˇ         28V / 20A Power Supply

ˇ         Low Noise Power Supply for Audio Amplifiers

ˇ         Power Supply with Noise Clean-up Circuit - Wenzel

ˇ         13.8V / 10A Power Supply - N1HFX

ˇ         13.8V / 40A Power Supply - OZ2BKK

ˇ         13.8V / 25A Power Supply - F5JTZ

ˇ         28V / 50A Power Supply - F5UAM

ˇ         1.25V-25V / 2.5A Power Supply

ˇ         DC/DC using a Linear Regulator

ˇ         High Voltage DC/DC Converter

ˇ         0-30V 3A Switch-Mode Power Supply

Electronic CW Keyers

ˇ         Electronic Keyer - F5JTZ

ˇ         Iambic Touch-Keyer - YC5NBX

ˇ         Simple CMOS Keyer - OH7SV

ˇ         Simple Electronic Keyer - N1HFX

ˇ         CW Electronic Keyer

ˇ         CMOS Iambic Keyer - N5FC

ˇ         All-BJTs Keyer

ˇ         CW Keyer - YO3APG

ˇ         Deluxe All-Solid-State Iambic Keyer - W1RML

ˇ         Electronic CW Keyer - YO3CZI

ˇ         Single-IC CW Keyer - W9HFM

ˇ         CW Keyer with NE555

ˇ         Memory Keyer - AI2T

ˇ         Micro-TO CW Keyer - K8CU

AGC Circuits

ˇ         AGC with Squelch Control

ˇ         AGC with AM Detector

ˇ         Receiver AGC with hang threshold

ˇ         AGC / S-meter - PY2MG

ˇ         AGC Audio Preamplifier

ˇ         AGC in Audio - RSGB

ˇ         Active CW Filter and Audio Amplifier

ˇ         Dynamic Noise Filter

ˇ         Microphone Preamplifier Electret

ˇ         Microphone Speech Processor

ˇ         Microphone Amplifier Low/High Impedance

ˇ         Class-A Headphone Amplifier

ˇ         Class-A Audio Amplifier

ˇ         Speech Processor - TL081

ˇ         Variable CW Bandpass Filter

ˇ         Variable CW Filter and Amplifier

ˇ         Audio Automatic Gain Control

ˇ         Baxandall Audio Filter

ˇ         Microphone Amplifier with ALC

ˇ         Audio Amplifier with mute control

ˇ         Noise Canceling Electret Microphones - WB9YBM

ˇ         Dynamic Microphone Preamplifier

ˇ         Speech Processor - All BJT

ˇ         Audio Preamplifier with Dynamic Noise Reduction

ˇ         Class-A HIFI Headphone Amplifier

ˇ         Super Class-A Low Distortion 3W Amplifier

ˇ         CW Audio Filter with Digital Selection - PY2MG

ˇ         Microphone Preamplifier with Tone Control - PY2MG

ˇ         Boosting Gain and Limiter of LM386 - VK3AWC

ˇ         Variable Audio LPF with MAX293

ˇ         300 Hz - 3 kHz Microphone Filter

ˇ         VOX Circuit

ˇ         Voice Level Meter

ˇ         Microphone Dynamic Compressor

ˇ         1kHz Sine Wave Oscillator

ˇ         High-Pass Low-Pass Microphone Preamplifier - N2MNN

ˇ         Passive Audio SSB-CW Filters - W3TS

ˇ         LC CW Band Pass Filters - DC8NR

ˇ         Audio Intelligibility Enhancer - N4GG

ˇ         Dual-Tone Audio Generator - VE3FIT

ˇ         RF Speech Clipper - DF4ZS

ˇ         1W Audio Amplifier with Compressor

ˇ         Booster for Elektret Microphone

ˇ         74dB Gain with LM386 - JF1OZL

ˇ         Active Audio BPF 1kHz Bandwidth

ˇ         Audio Squelch Circuit

ˇ         High Dynamic Range Audio Compressor

ˇ         Low Distortion CW Filter

ˇ         SSB Audio Filter

ˇ         Active Noise Canceling Headphones

Microwave and Microstrip Circuits

Miscelaneus Circuits

ˇ         Microwave Motion Detector

ˇ         Biasing Microwave GaAs FET's

ˇ         UHF Doppler Motion Detector

ˇ         2.4 GHz Prescaler

ˇ         Divide by N using 74160 - Wenzel

ˇ         Staircase Frequency Divider - Wenzel

ˇ         Frequency Counter Prescaler

ˇ         12 GHz : 1000 Prescaler - DG6RBP

ˇ         Quarter-wave Coaxial Baluns

ˇ         UHF Movement Detector

ˇ         Bias-Tee 5 kHz to 3 GHz

ˇ         Microwave Coaxial AM Diode Detector

ˇ         Microwave FM Diode Detectors

ˇ         Microwave Microstrip AM Diode Detector

ˇ         Power-Combining using Wilkinson Dividers

ˇ         Distributed Wideband Balun for Microwaves

ˇ         Microstrip Couplers

ˇ         Microstrip Stubs

ˇ         Phase Shifters Topology

ˇ         1296 MHz Cavity Tuned BPF - VK2TDN

ˇ         Microstrip Balun

ˇ         Microstrip Filter Comparation

ˇ         Microstrip Phase-Shifter T/R-switch

ˇ         Gunn Diode Oscillators

ˇ         47 GHz to 94 GHz Frequency Doubler

ˇ         Microstrip Bends

ˇ         Microstrip Coupler Splitter Balun

ˇ         Microstrip Discontinuities and Applications

ˇ         Microstrip T-Junctions

ˇ         Waveguide Transistions

ˇ         Lumped to Distributed Conversion

ˇ         High Dynamic Range Noise Blanker

ˇ         Left / Right Revolution Counter (for tuning)

ˇ         RF Activated Tone Monitor

ˇ         PTT Delay Circuit - W3KKC

ˇ         HF QRP Manual Tuner - W6JJZ

ˇ         Ultrasonic Proximity Detector

ˇ         Multi-Q Receive Loop Antenna

ˇ         Phase Detector with Discrete Components EK47-Receiver

ˇ         Low-Cost FSK Generator

ˇ         Noise Blanker

ˇ         Laser-Torch Wireless Communication

ˇ         LNB 13V/18V H/V Switch

ˇ         Modulation Circuit for SHF Beacon

ˇ         RX/TX 27 MHz Wireless Remote Control

ˇ         Air-Speed Sensor for Cooling Fan

ˇ         3xFETs Noise Blanker

ˇ         Antenna-Tuner for QRP

ˇ         RIT for VFO Transceivers

ˇ         90-degrees Phase-Shifter for IQ-modulation

ˇ         S-meter 120dB Dynamic Range - DC4KU

ˇ         Prevent Thermal Runaway for BJT Power Amplifiers

ˇ         Temperature Compensation for X-tal Oscillators - I6MCF

ˇ         500 kHz - 30 MHz Antenna Tuner

ˇ         Balanced Antenna Tuner - W4MMQ

ˇ         Simple Dual-Gate MOSFET PLL

ˇ         HF Antenna Tuner with VSWR-meter

ˇ         FSK Modulator CMOS

ˇ         Line Synchronous Noise Blanker - KA7OEI

ˇ         Interference Canceling Circuit - VK5BR

ˇ         Cascode Amplifiers - JG1EAD

ˇ         Sine to Square Wave Converter - Wenzel

ˇ         SSB Modulator/Demodulator - JG1EAD

ˇ         IQ Phasing Modulator

ˇ         Tayloe IQ Detector - W6JL