noise

8el 144MHz Super Low Noise OWA Yagi Priority listing - This is a super stable 50OHm direct feed Yagi for 2m using 1/2 inch tube and a real easy build.

14elem. 144MHz OWA EME Yagi - Simply a superb 50Ohm 2m Yagi with excellent bandwidth and most important, low noise.

14 el 70 MHz Low Noise LFA Yagi - This is a true monster Yagi for the 4m band which has a 50Ohm feedpoint with wide band performance yet the gain and F/B of a low impedance Yagi.

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

Noise Figure Measurement using Standard Antennas - Measuring noise fiugre on the W2IMU horn and the dual-dipole-feed

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.

Olympix - Performance RFI Filters that work right at the noise sources, ferrite cores.

RF Noise Powerstroke Diesel - Reducing and removing RFI Noise

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

Audio CW Filter - A very effective AF Adaptor, with built-in noise blanker and 30 Hz CW filter modules by PA0LQ

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

Kenwood TS-480 Notes  ^updated - N0RQ's brief notes on the Kenwood TS-480

Kenwood TS-850 Noise Blanker Mod - Reduces line noise on TS-850

FT-817 NB Improvement - Yaesu FT-817 noise blanker improvement

Spikes CB Radios - A full service sales & repair shop, sell a wide range of cb radios, scanners, antennas, mounts, echo, noise toys and a wide range of accessories. Atkinson, IL USA

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

Multi-Instrument - Contains a PC sound card based signal generator. It can generate functions, multitones, arbitrary waveforms, burst tones, MLS, DTMF, musical scales, white noise and pink noise, and frequency/amplitude sweep. Fully functional free trial downloadable.

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

Bose Headphone Mod - Adding a boom mike to Bose Quiet Comfort (QC-1) noise-cancelling headphones

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

Improving Receiver Noise on 50 MHz - Tests on a preamplifier for 50 MHz installed right at the feedpoint of the antenna.

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

NEQRP Noise Bridge - A noise bridge is a device for measuring or comparing impedances on coaxial cables, antennas, components, etc.

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