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Analysis of flag receiving antennas using MININEC with focus on relation of size and atenna height by VE6WZ

February 10-20, 2012 Winter DXpedition to Miquelon Island

Shiawassee Amateur Radio Club

Determining the characteristic impedance (Z) of an unknown coaxial cable, a common challenge for many radio amateurs, can be resolved with a straightforward method. The impedance of a coaxial cable is derived from its inductance and capacitance, and importantly, these values are independent of the cable's length or the operating frequency. This means that measuring a random length of cable, such as 20 meters, provides sufficient data for calculation. The core of this technique involves an LC-meter to obtain the inductance (L) in microHenries (uH) and capacitance (C) in microFarads (uF). The impedance is then calculated using the formula Z = L/C. For instance, a measurement yielding L=1.2uH and C=450pF (0.00045 uF) results in an impedance of 51.6 Ohms, closely matching **RG-58** specifications. Similarly, a TV coaxial cable with L=1.8uH and C=320pF (0.00032 uF) calculates to 75 Ohms. While the accuracy of this method, depending on the LC-meter's tolerance, is approximately 10%, it proves sufficiently precise for practical determination of unknown coaxial cable impedance, as noted by Makis, SV1BSX, who credits Cliff, K7RR, for the formula's dissemination.

The Syrian Scientific Technical Amateur Radio Society.

These band filters are based on 3 or 5 sections Butterworth band pass filters, maintaining 50 Ohm impedance, and when built around toroidal inductors, can be made very compact.

An unique method to listen to QRSS signals is... using an old tape recorder with variable speed

Data sheets for most of the major components of the K2

Work any five Province of Québec Lighthouses

Schematic diagram circuit to build a RS232 serial interface for the Yaesu FT 1000D, works also as CW Keyer control with Log-EQF software. May be used with other Yaesu HF Transceivers.

A detailed review of the Icom IC-7700 by VA7OJ/AB4OJ

The South Milwaukee Amateur Radio Club is an ARRL general-purpose affiliated club with Hams from all interest groups

A home made Antenna Tuner made with a simple inductor and a few spare parts. Despite the title, the author succesfully tested this ATU with higher power inputs.

A 3 band dipole antenna for 40-80-160 meter bands, It's made with easily available materials and is designed for inverted V mounting. The antenna is shortened for these bands, but still manages to make contacts in 80m and 160m with stations in Canada and the USA. The construction details are provided, including the dimensions of the antenna elements and the traps. The antenna is easy to build and provides good performance in all three bands. In Italian.

Yaesu FT-450D HF / 6 Meter DSP Transceiver, a nice affordable transceiver for amateur radio use, but understand the caveats.

Tips on QSLing. Once you work that DX station, you have won the battle, but the war may just be beginning. I am talking about getting the QSL card. There are several ways to go about this.

A multiple page article about assembling the antenna system, this section includes informations on constructing of the concrete tower base, starting from setting up correctly the foundations in relation to the antenna height.

Elecraft K2 mod. Narrower bandpass filter, better stopband attenuation

The Tararua Amateur Radio Club, Branch 06 of the New Zealand Association of Radio Transmitters (NZART) is an incorporated society for Radio Amateurs and interested persons.

This page provides a list of UK scanner frequencies, specifically focusing on the Police UHF bands. It is a useful resource for hams interested in monitoring and listening to police communications in the UK. The page offers a detailed breakdown of frequencies used by the police, allowing hams to stay informed and connected to emergency services in their area.

Western Suburbs Radio Club NZART Branch 03 - ZL1AC

VHF repeater located in bedale north yorkshire

Most Common Service Questions for the Icom IC-R7000 and IC-R7100

Amateurfunk Homepage des DARC Ortsverbands Vaterstetten C01

A stacked Yagi array for ZL1SIX 2m WSPR

This antenna just requires about 24m of free space instead of 41m that a normal half wave 80m antenna needs to hang up. The so called loaded dipole uses a coil in every dipole arm to electrically lengthen the mechanical too short dipole arms. Every coil has an inductivity of 120 microHenry.

An home made simple spectrum analyzer project includes pictures and diagram.

A collection of QSL confirming EME contacts

Dedicated to promoting the contributions of women in Amateur Radio.

FP, St Pierre - Miquelon from about 15 March to 21 March 2011

DX Pedition from Palau T88RF Apr.30 - May 4, 2012

Active RDF club in California

How to send and receive QSL cards at RSGB

QCWW Chapter 120 amateur radio club

Map of locators of Uruguay

Homepage of the Dutch amateurradiostation PE4BAS.

Map of locators of ecuador

This small dual band UHF VHF directional antenna is good choice for portable operations. This antenna is composed by a moxon antenna for the two meters band and it includes two parastatic elements for 70 cm band.

FSQ is a Fast Simple QSO mode designed specifically for HF. It works well under NVIS and sunrise/sunset conditions on the lower bands, and also works well for short skip and grey-line on higher bands and can be used also on VHF FM.

Amateur Radio Section, Isle of Wight England UK

Once you have designed your QSL label from the Label Settings screen, you will be able to print QSL labels and address labels from the OQRS requests submitted for your Call or Calls.

2 Wavelength ,2 Meter Bi-Square Beam , 5dbd gain. This antennas are very cheeap to build and their radiation pattern is similar to a figure 8 with maximum signal through the loop but they may be used as a near-omnidirectional antenna

Hy-Gain TH3jr Tri-band HF 3 Element Beam Covers 10, 15 and 20 Meters assembly instruction manual

Amateur Radio enthusiasts who are interested in the LF and MF bands may be familiar with WSPR and WSJT JT9. Used as a propagation probe or beacon, WSPR allows very weak signals to be detected, frequently as weak as -27dB SNR.

Map of locators of Bolivia

A Western Pennsylvania Radio Guide

separate the K2 dot paddle input from the PTT

A QSL card is a written confirmation of a two-way radiocommunication between two amateur radio stations. The QSL card has been the most important part of Amateur Radio communications procedure for many years. QSL cards are used for awards and for just the pleasure of collecting the cards.

This will document a custom version of the K4EAA Dummy load done using 20 1K ohm 3 Watt Resistors, Piece of brass sheet, a quart paint can and a BNC connector