w2ihy noise gate constru

12el 144MHz Plus2 LFA Priority listing - A Low-Noise Urban 12 element Plus2 LFA Yagi antenna for 144MHz no match required, 50Ohm direct feed

6el 70MHz Low Noise LFA Yagi - A Super 6 element LFA Yagi for 4M. 5.15 mtrs long and 12.4 dBi. Awesome antenna with no matching required and flat SWR throughout. Easy build

11el 50MHz Low Noise LFA Yagi  ^updated - A Large 11 element LFA Yagi for self build. Easy construction as no matching is required. Super gain, F/B and flat SWR

10el 50MHz Low Noise LFA Yagi - A high gain LFA 10 element LFA Yagi with super clean pattern and flat SWR no matching required so easy to build.

9el 50MHz Low Noise LFA Yagi - A 9 element 6M LFA Yagi with no matching required. Super flat SWR, great pattern and gain too. What more do you need?

Online Dipole Antenna Calculator - Online calculator and construction instructions

Modern Beverage Receiving Antenna - A helpful guide to building your own beverage-type low noise receiving antenna for broadband use. Easy, do-it-yourself suggestions to optimize directional performance, even if you lack a farm to put it on.

G5RV Multiband Antenna - About the G5RV antenna, construction notes and tipical dimensions

Video of a W3DZZ Trapped Antenna - Video construction of a multiband HF trapped dipole antenna based on a variation of the classic W3DZZ design

13el 50MHz Low Noise LFA Yagi - A Monster 13 element 6M LFA Yagi with flat SWR, 50 Ohm direct feed and minimal side lobes

12el 50MHz Low Noise LFA Yagi - A 22 metre long 50 Ohm Monster 6M 12 element Yagi. Super gain, Flat SWR, excellent F/B 50 mhz antenna.

G5RV Antenna Revisited - GR5V characteristics and construction details PDF file

RFI From Computer Equipment - Recordings of RF noise from personal computers, peripherals and related equipment. If you can match noise at your location to one of these files then you can be confident that you know where your noise is coming from.

MB7USK - APRS Internet Gateway in Folkestone, Kent UK

Balloon Lift with Lighter than Air Gases - balloon buoyancy, balloon materials, and antenna construction materials.

Transceiver to pc interface for echolink - with a hardware DTMF detector and galvanic isolation designed for SVXlink based Echolink gateway

Mobile Radio Noise Elimination - If you're driving around town listening to the buzz and engine whine blues, pick up this free pub and help yourself enjoy the music. Includes troubleshooting techniques and helpful hints.

SimJT - SimJT is a simulation program. It generates audio-frequency JT65 and CW signals in a background of gaussian white noise, with user-specified signal-to-noise ratio.

Noise Cancelling Headphones - Review of common noise cancelling headphones for under $50.00 by WA4PGM

Earth Grounding Construction Materials - Article about types of materials that make the best earth grounding systems

HomeBrew CW Paddle - AA5TB home made CW paddles, pictures and construction details

M3 Electronix Semiconductor Analyzer Kit - A workbench instrument capable of testing transistors, diodes, FETs, usefull constructing QRP circuitry.

RF Noise Supression - CB Radio RF Noise Suppression

Calculating the Received RF Noise Power - Voacap, high-frequency ionospheric communications analysis and prediction

Computer monitor noise on HF - RFI Forum at eHam.net