Tunable Preselector for HF

0.5 pF - 0.6 uH step                - NOT FINISHED YET

Band-pass and band-reject function

Elegant PCB Artwork Ruler

RF & MW SPECIAL EDITION 2016

With half-mm and 25 mil scale, awg gouge and more...

Projects & Articles


Here you can find project ideas you can build at home. The most important issue behind every project here is to keep it simple and reproducible at home, without needing expensive test equipment. I hope you can find one that suits your needs. For the projects involving wiring or connection to mains power please be very careful or ask for expert help. Your life is in danger and I don't want to be responsible for any harm or loss.

Si5351A Clock Generator

8 KHZ - 150 MHZ with 10ppm 27 MHZ Crystal 

3.3V and 5V I2C Interface 

MS5611-01BA03 Barometric Pressure Sensor - Altimeter  NOT AVAILABLE

24 bit ΔΣ ADC - 10 cm resolution 

I2C and SPI Interface 

ADL5519 Dual RF Detector

With Ultra-Low-Noise Voltage Regulator

1 MHZ - 10 GHZ max Dual RF Channel Log-Linear RF Detector - Use with a directional coupler and measure Return Loss, FWD power and RFL power

AD8310 Fast RF Detector

With Ultra-Low-Noise Voltage Regulator

LF - 440 MHZ Very Fast (ASK/AM Demodulation Possible) RF Power Log Detector with 95 dB Dynamic Range

AD8307 RF Power Head

With Ultra Low-Noise Voltage Regulator

0.1 - 500 MHZ / 25 - 50 - 100 mV/dB Voltage Output RF POWER DETECTOR

2.4 GHZ - 1 W Amplifier

RF2126 based

Is it possible using SMD 1206 components?

 More to come soon...


2N5109 Amplifier

LNA, Post Mixer, or Gain Block

A nice 16 dB amplifier to more than 110 MHZ

Elegant PCB Artwork Ruler

On Gold-Plated FR4 PCB

With half-mm and 25 mil scale, awg gouge and more...

RF Attenuator

Plus a Microcontroller Unit with OLED display and rotary encoder

0-31dB with one RF module or 0-62 dB with two RF modules with 1dB step, PE4306 based

Ultra Low Noise

Pre-Amplifier VHF/UHF

50-4000 MHZ PGA-103+ based with IN/OUT relay and ultra low-noise power supply 

Mains power-line Isolator

Using a 50 HZ BALUN transformer

Clean AC power for your clean Audio and RF equipment - The best "power conditioner"

MMIC Amplifier

Mini-Circuits ERA series gain module

Small and handy

RTL-SDR Up-Converter

True DC - 55 MHZ with 200 MHZ LO

USB powered, with switchable HF LNA (2 x Gali-74+) and diplexer terminated passive double-balanced mixer.

HF Pre-Amplifier

2x J310 J-FETs in Push-Pull


A nice 15 dB low noise pre-amplifier for 0.5-54 MHZ (or modified for 30 KHZ - 30 MHZ)

A new collar for pets

Production scheduled for winter

FSA3157 H-Mode Mixer

As per PA3AKE description 

with dual DAC or Potentiometer

Ham-Band Preselector

with RF relays and DC wetting

Two double-tuned networks withby-pass/pre-amp/attenuator manual or MCU control

100 Watts TR Switch

50 - 6000 MHZ on Rogers (TM) R4003 PCB

Quiet and Ultra Fast (<100 nsec) Solid State Receive/Transmit Switch

AD8302 RF MODULE

With Ultra-Low-Noise Voltage Regulator

LF-2700 MHZ Gain and Phase Detector

HELA-10 Amplifier

LNA, Post Mixer, or Lab Gain Block

A nice balanced 11 dB amplifier with +30 dBm (1 Watt) output power

SV1AFN Design Lab

PGA-103+ LNA

25 MHZ - 4 GHZ - Ultra Low Noise Figure

Input overload protection diode, Inverse supply polarity protection, LD Voltage Regulator

AD8318  RF Power Detector with 12-bit ADC


70 dB dynamic range, 1 MHZ  - 8 GHZ Log Detector with 12-bit ADC and ultra stable & low noise Voltage Reference


Easy interface to any micro-controller, Arduino etc.


What else would you like to see here? Suggest a new project, comment, discuss, complain, say hello...

HMC784 TR Switch

10 Watts MAX

8V CMOS DRIVE  

VHF UHF Diplexer

With SMD high power components

DC-235 MHZ VHF port, 290-500 MHZ UHF Port

ADL5513 RF Power Head

With Ultra Low-Noise Voltage Regulator

1 MHZ - 4000 MHZ / 21 mV/dB Voltage Output RF POWER DETECTOR

AD8313 RF Power Head

With Ultra Low-Noise Voltage Regulator

100 - 2500 MHZ / 18 - 50 - 100 mV/dB Voltage Output RF POWER DETECTOR

8 PCBs Panel with Mini-Circuits PAT-Series 

Ceramic RF Attenuators

DC-7 GHZ 1 Watt precision attenuators for your bench

1,2,3,5,10,10 and 20 dB attenuators with Male and Female SMA connectors

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Band-Reject Filter - Notch

88-110 MHZ

Kill those ghost signals from your SDR receiver from 20 to 1500 MHZ

DRA-818V / DRA-818U

1W VHF or UHF miniature transceiver

with Audio Amplifier and Low-Pass Filter

ADF4351 PLL Synthesizer

35 MHZ - 4400 MHZ

Miniature sized - External REF only

12V DC Power Distribution Module

DIY KIT or Built & Tested

With Switch, Relay, Fuse and reverse polarity protection

Elegant PCB Clock 

On Gold-Plated FR4 PCB

24h movement and with passive RF Detector