AREDN

Amateur Radio Emergency Data Network

AREDN (Amateur Radio Emergency Data Network) was an outgrowth of the ARRL working group on High-Speed Multimedia (HSMM). It has evolved over the past 10-12 years from its first implementation by Broadband Hamnet (BBHN). Over the years the AREDN Project has developed software support for nearly 70 commercial wireless routers—moving them from their Part 15 allocation into adjacent Part 97 allocations in the .9, 2, 3, and 5 GHz bands—providing an inexpensive and easy way for hams to implement high-speed (up to 144 Mbps) data networks in support of Emergency Operations Centers (EOCs), Non-governmental Agencies (NGOs) and first responders. The project has twice been recognized by the league for the significance of its achievements by awarding the Project the ARRL Microwave Development Award in 2014 and 2018.

With are hilltop location this could be a viable system for emergency communications if the internet went down. There are 2 hams in the area now using it in the North Hills but other parts of the country have some very extensive systems in place. AREDN can also be used for controlling off site repeaters and remote stations with out relying on the internet. For more info checkout…www.arednmesh.org/

The primary goal of the AREDN® project is to empower licensed amateur radio operators to quickly and easily deploy high-speed data networks when and where they might be needed, as a service both to the hobby and the community. This is especially important in cases when traditional “utility” services (electricity, phone lines, or Internet services) become unavailable. In those cases an off-grid amateur radio emergency data network may be a lifeline for communities impacted by a local disaster.

Costs of devices range from $50 to several hundred dollars for a complete node, so there are many options even for the budget-conscious operator.

It would be nice for are club to implement this in the Pittsburgh area.

What is a Radiogram

What is a Radiogram (DEFINED)

radiogram is a formal written message transmitted by radio. Also known as a radio telegram or radio telegraphic message, radiograms use a standardized message format, form and radiotelephone and/or radiotelegraph transmission procedures. These procedures typically provide a means of transmitting the content of the messages without including the names of the various headers and message sections, so as to minimize the time needed to transmit messages over limited and/or congested radio channels. Various formats have been used historically by maritime radio services, military organizations, and Amateur Radio organizations.

Radiograms are typically employed for conducting Record communications, which provides a message transmission and delivery audit trail. Sometimes these records are kept for proprietary purposes internal to the organization sending them, but are also sometimes legally defined as public records. For example, maritime Mayday/SOS messages transmitted by radio are defined by international agreements as public records.

From The: Union City Wireless Association
RADIOGRAMS IN DETAIL Power Point Presentation  — {PDF VERSION HERE}

Would you like to learn CW?

Would you like to learn CW? Would you like to improve the skills you already have? Even with today’s digital modes, CW still offers many advantages and fun experiences. The Uniontown ARC, W3PIE, is planning a set of CW classes that are designed to take you from 0 to 25 WPM and beyond. The classes will be held at the Clubhouse, with on-line practice sessions to boost your skills. Learning the Code is easier than ever. We already have a number of hams interested, but have room for a few more. Please comment below if you wish to attend and what evenings of the week (or Saturday morning and afternoon) would work best for you. We should be scheduling this soon.

For comments to to follow Check out the WPA ARRL Facebook Page
https://www.facebook.com/groups/671942146305645/

 

 

Time to start studying

Its Time to start studying Steel City announces 2020 VE Testing sessions.

Steel City ARC – 2020 – VE TESTING SESSIONS  @ 7:00pm

March 18
April 22
May 20
June 17
July 22
August 19
September 16
October 21
November 18

PREREGISTRATION STRONG RECOMMEND – WALK-IN’S ALLOWED
To make sure we have enough testing materials on hand, and that you don’t have to wait for us to get ready we are highly recommending that people interested taking the exam preregister.

Check our VE TESTING page: http://w3kwh.com/ve-testing/

 

Solar Powered Ham Radio

From The Website: https://solarpoweredhamradio.com

I’ve been able to solar-power a small ham radio station for about two hundred dollars. The radios in this setup have relatively modest power requirements:

  • Elecraft KX-1
  • Kenwood TH-F6A 2M/440 handheld

Here is a diagram of the station’s power supply:

LOw Cost Solar Powered Ham Radio Station

Solar Panel
The solar panel is a small 20W panel . It is large enough to operate the KX-1 and charge the TH-F^A continuously (when there is sunshine) and keep the battery fully charged.

Charge Controller
The charge controller is the Morningstar SG-4 PWM 4.5A Charge Controller. This is a PWM controller so it is less efficient than an MPPT controller but in this low-power application it will be just fine.  It also cost only $25.75.

Battery
The battery is a 7.5Ah Gel CEll. . In this application, there is nothing magic about the capacity (7.5Ah). You’ll reliably and repeatedly get 4.5Ah out of this battery. (For an explanation of why 4.5 instead of 7.4 Ah, read this post.)  It contains enough charge to operate the KX-1 for about 6 hours.

Why didn’t I use a Lithium battery, you ask? Lithium batteries, preferably Lithium Phosphate (LiPo) are much smaller and lighter.  However, most charge controllers are intended for use with gel cell batteries. Lithium battery packs also need charge-balancing periodically.

Power Meter/Analyzer
Why a Wattmeter / Power Analyzer? The meter operating inline continuously allows me to keep tabs on the battery voltage. It is really important to avoid discharging the battery below about 11.9V (Click here to learn why). It is also useful for measuring the actual current draw of the radios (as well as the output fro the solar panel and charge controller). This particular meter comes with Anderson Powerpole connectors already installed.

Radios
The Elecraft KX-1 draws about 700mA on transmit and 30mA on receive.  For the Kenwood TH-F6A, I use its own internal batteries and recharge them from the 12V Gel Cell.  The TH-F6A draws about 300mA while charging.

Portable Magnetic Loop Antennas Antennas

A magnetic loop behaves electrically as a coil behaves electrically as a coil (inductor) with a small but non-negligible radiation resistance due to its finite size. It can be analyzed as coupling directly to the be analyzed as coupling directly to the magnetic field opposite to the principle of a Hertzian dipole which couples directly to the electric field in the near field, which itself is coupled to an electromagnetic wave in the far field through the application of Maxwell’s equations Maxwell’s equations.

Presentation By: Eric Norris WD6DBM


https://www.fars.k6ya.org/docs/Portable-Magnetic-Loop-Antennas-v2.pdf

From the website of: Foothills Amateur Radio Society