w2ihy noise gate constru

K9AY terminated loops for 75m - It is very compact, low noise and directive with an impressive 20 to 25 dB front to back

2 elements cubical quad for 20m to 10m - Construction details and tests about a 2 elements cubical quad antenna for HF Bands (20,17,15,12 and 10m band).

Low-noise receiving antenna for 80 and 160 m - How you can make a low-cost, low-noise, 21-foot-square receiving antenna that boost your DX ability.

Flag Antenna - Flag Antenna construction and test results by WA1ION

50 MHz Noise Canceling Receiver Front End - Reducing noise on six meter band

Build an igate - APRS4R Digipeater configuration notes by K6DBG

Ingnition notes on RFI by K0BG - Removing noise caused by ignition and injection systems

Alpha 9500 blower problem - How to reduce noise on Alpha 9500 amplifier fan.

APRS4R - APRS4R is a free APRS digipeater or gateway software for embedded devices

EvoSpice - A numerical optimizer (solver) for LTSpice IV. Uses a fast evolutionary algorithm. You can use EvoSpice to design high efficiency power supplies, audio filters, low noise RF amplifiers and an endless list of other applications

Icom Radio Programming Software - Collection of DOS based software for programming ICOM radios

Low Noise Microwave Amplifier Design Tutorial Series - This series will follow to completion the full Low Noise Microwave Amplifier design, development and prototyping.

70 Mhz Linear Amplifier - A 4 meter RF Amplifier project by G5VZ, design, development and construction

Build an Antenna Launcher - Constructing a Compact Low Cost Sprinkler Valve Antenna Launcher

Build a compact antenna launcher - Constructing the QE19 Antenna Launcher

Homebrew longwire antenna launcher - Construct an antenna launcher

Homemade OPC-017A Cable - Home build an OPC-017A cable for Icom radios

Dummy Load - Build a home made dummy load by G8MNY

Noise Bridge Tuner Tuner - Noise bridge circuit to tune your tuner

Grounding and Receiver Noise - An interesting article on grounding and receiver noise

Winding coils - winding coils for construction project

PIC-Keyer - This project describes the construction of a real CW QRP keyer with a small microcontrolle

Amateur Radio - Microphone Preamp - Low signal, noise-high AC gain preamplifier

Noise cancellation on 2m using 2 antennas - Article on Phase-cancellation of noise on 2m band

Germanium Noise Generator - This generator requires 100volts supply at 5mA. A 0 -5 mA meter inserted at J1 measures the crystal current.