speaker noise

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.

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

Audio filters and speakers - Review of common audio speakers for mobile setups

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.

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

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

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

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

Speaker Building - DIY speakers, resources for custom speaker hombrewing

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.