stand off

stand off

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• A model of a practical Ruthroff 1:4 balun - The 1:4 balun is of particular interest because it underlies many other configurations, and understanding it helps towards understanding the other Ruthroff balun configurations.
  [ Hits: 4273 | Votes: 7 | Rating: 3.43 ]

• TEFV Terminated End Fed Vee Antenna - The Terminated End Fed Vee Antenna (TEFV) is a travelling wave antenna with constant current distribution. Unlike traditional resonant antennas, TEFV operates without standing waves, using a terminating resistor for broadband efficiency. With a combination of vertical and horizontal polarization, it offers wide bandwidth from 1.8 MHz to 30 MHz, eliminating the need for a tuner. Key components include a 9:1 unun transformer and a 500-ohm terminating resistor. Grounding and counterpoise enhance performance, and it can handle power losses of up to 30%. TEFV provides an effective, versatile antenna solution for amateur radio and broadcast applications.
  [ Hits: 187 | Votes: 2 | Rating: 6.5 ]

• Low loss Japanese coaxial cable - 5D-FB,8D-FB,10D-FB cables offer very low attenuation comparable to that of famous Andrews' Heliax and 8D-FB is almost half that of standard RG-213 for an equivalent diameter!
  [ Hits: 989 | Votes: 2 | Rating: 9 ]

• What make the carolina windom so good - The off-center fed CAROLINA WINDOM provides outstanding performance on all bands. This includes all the WARC bands, 30, 17, and 12 meters.
  [ Hits: 6615 | Votes: 3 | Rating: 4.67 ]

• Baldor Generators - Baldor Generators offers a complete line of portable, standby, prime power and peak-shaving generators in the industry from 3 - 2,000 kW in gasoline, LP, natural gas or diesel. Part of ABB group
  [ Hits: 571 | Votes: 1 | Rating: 1 ]

• Empower RF Systems - We offer a large selection of standard and custom High Power RF and Microwave amplifiers for broadband, general communication, matched band, and personal communication markets.
  [ Hits: 3077 | Votes: 3 | Rating: 8.33 ]

• MyAntennas.com - MyAntennas.com offers standard and custom made multiband antennas, Baluns, Common Mode chokes and accessories. All products are designed and made by Danny Horvat, E73M an antenna design engineer formerly employed by Cushcraft Corporation.
  [ Hits: 781 | Votes: 1 | Rating: 1 ]

• Norm's Fabrication - W8TTH Welding & Machining , tower plates, side mounts standoffs, house brackets, torque arms.
  [ Hits: 1106 | Votes: 5 | Rating: 7.2 ]
• KF7P Metalwerks - Metal products manufacturer for Grounding, cable management, surge arrestors, tower accessories, Coax standoff arms for telescoping towers, Safety stand tower platform, Mast steps, tower installation tools
  [ Hits: 353 | Votes: 3 | Rating: 6.67 ]

• DRM mode Ham specifications - This document describes the DIFFERENCE of mode HAM to the official broadcast DRM standard
  [ Hits: 1332 | Votes: 0 | Rating: 0 ]

• M17 digital radio protocol for data and voice - M17 is a community of open source developers and radio enthusiasts. We are building understandable systems in support of the hackers and experimenters' history of ham radio. M17 is developing open source hardware, software, and offers a complete digital radio protocol for data and voice, made by and for amateur radio operators. M17 voice mode uses the free and open Codec 2 voice encoder.
  [ Hits: 56 | Votes: 17 | Rating: 9.47 ]

• Seiuchy On-line morse code trainer - Seiuchy is a web based morse code trainer that can be used even offline once the page is loaded. Trainer can be configured to send call signs only or just part of a standard QSO, and a full QSO too. Answers are then compared and displayed and a score get calculated.
  [ Hits: 244 | Votes: 2 | Rating: 9.5 ]

• W9GF GAP TITAN DX Antenna Installation - An unusual Titan DX antenna seutp, done without the standard counterpoise. This document is not an official manual, but rather a personal note to record the antenna setup with the custom wire counterpoise.
  [ Hits: 476 | Votes: 2 | Rating: 9 ]

• jLog - jLog is a modern Freeware Ham Log program that can run on all major platforms, e.g. Mac OS X, Mac OS, Linux/Unix, Windows, etc. It offers a nice, clean interface and allows efficient entry of QSOs. Import or Export of data using the standardized ADIF 2 format is possible to easily exchange data with any other decent Log program. Built-in CW Keyer, CAT control for many popular, rigs, DX Cluster tracking, call lookups
  [ Hits: 14338 | Votes: 18 | Rating: 8.11 ]

• ADIF.org - Official ADIF Site. ADIF is an open standard for exchange of data between ham radio software packages available from different vendors.
  [ Hits: 1285 | Votes: 1 | Rating: 5 ]

• AF signal function generator for Windows - Windows signal function generator sotfware, offers 4 main channels, 4 modulators, 1 measurement generator, 1 frequency standard generator, Amplitude, phase and frequency modulation, can generates real band-limited signals
  [ Hits: 618 | Votes: 4 | Rating: 3 ]

• Spectrum Analyzer Real-time FFT - Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.
  [ Hits: 11316 | Votes: 9 | Rating: 7.77 ]

• Arduino Flex Controller - Arduino Flex Controller can be used with the new Flex 6000 Signature rigs. It is a DIY project and in these pages you will find all the informations you need to build and program your own. It is a perfect companion when used next to the official SmartSDR program but it can be used in stand-alone mode, without a PC.
  [ Hits: 115 | Votes: 0 | Rating: 0 ]

• Understanding Impacts of 75-ohm Devices in 50-ohm Systems - This article explores the implications of using 75-ohm devices, common in TV setups, within 50-ohm systems. While mismatched cables and connectors may lead to minimal consequences in receive-only setups, potential losses and reduced isolation in splitters and taps are examined. The article concludes that, for general applications, inexpensive TV-type components can offer reasonable performance with some trade-offs
  [ Hits: 149 | Votes: 2 | Rating: 9.5 ]

• The BBRC Frequency Counter - The Burnham Beaches Radio Club frequency counter is a PIC micro controller based frequency counter with LCD readout. It can be used stand alone or the in built offsets allow integration into a receiver
  [ Hits: 857 | Votes: 0 | Rating: 0 ]

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