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Antennas : 2M
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.
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