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Antennas
The HB9CV antenna
- Gain of this two element antenna is the same like gain of classical three element antenna of the YAGI type. Dimensions for 7-14-21-28 Mhz by pa3dlp
RF Transmission Line Loss Calculator
updated
- This calculator computes the matched line loss for a transmission line using a model calibrated from data for the transmission line types built in to the calculator.
It also gives an estimate of the mismatched loss if the mismatch is specified.
Effect of tower coupling on an array
- It's well known that a nearby tower can affect the performance of a vertical array, this article by NK7U describe measurements and prove interaction.
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.
End fed-Halfe-wave antenna
- This type of antenna has same performance as a dipole, but requires only one single mounting point
80 m helical antenna
- Prototype of a 80 meters helical antenna on a 6 meters squid pole by VK2TTL
AA5AU PVRC Antenna Mount Page
- The PVRC Mount is a tilt-head type antenna mount that allows large HF Yagi antennas to be easily installed on towers.
A Pyramidal Antenna for 14-30 MHz
- This article is about a type of log periodic antenna that surprisingly little has been written about
Horizontal Antennas above Real Ground
- Antennas are influenced by the effect of the ground and by the type of conductors from which they are constructed. Effects of various types of grounds on a 1.825 MHz horizontal 0.5 wave dipole
Measuring Tower Resonances
- Some notes on measuring tower resonances by Rudy Severns, N6LF
Tower interactions
- A study on vertical-tower interactions by N6LF
The Old Radio Shop
- Old Radio Shop repairs and restores all types of vintage Tube , Hueytown, Alabama
Sounds of the Commercial and Military Digital Station
- Information and digital audio samples of various modem modulation types
Antennas Store - antennas.us
- All types of Military Antennas, Law Enforcement Antennas, Mobile Radio Antennas, GPS Antennas, Satellite Antennas, WLAN/Wi-Fi/WiMax Antennas, Cell Phones, TV, HDTV Antennas available and sold
Meteo Fax and RTTY frequencies
- List of freqencies where is possible to listen to teletype RTTY meteo fax transmissions
Simple CW keyer
- OH7SV ultimatic type keyer with Dit priority
Yaesu FT-2000 YouTube videos
- Yaesu FT-2000 on YouTube
Yaesu VR-5000 Review
- Strong Signals review of the yaesu VR 5000 general coverage radio receiver
Yaesu VX-8R at Dayton Hamvention
- Yaesu vx-8r prototype quad-bander on display at the 2008 dayton hamvention. Youtube video
Coaxial Cable The neglected link
- The purpose of this document is to show the transfer impedance and shielding effectiveness of different types of coaxial cables
Duplexers: Theory and Tune Up
- Basics on duplexersn type of duplexers and how duplexers works
Earth Grounding Construction Materials
- Article about types of materials that make the best earth grounding systems
QRP AM(cw) Transmitter for 10 meters
- In this project, you will make a simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillator.
Icom microphone reference list
- List of Icom microphones with connector type description and transceiver compatibility
Intermodulation
- Intermodulation distortion, commonly known as Intermods, is a type of interference that can occur in any non-linear junction.
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