Amateur Radio Weekly – Issue 54

New technology may double radio frequency data capacity
A team of Columbia Engineering researchers has invented a technology—full-duplex radio integrated circuits (ICs)—that can be implemented in nanoscale CMOS to enable simultaneous transmission and reception at the same frequency in a wireless radio.
Columbia University

SARnet: Florida’s state-wide repeater network
SARnet utilizes the FDOT microwave system as a backbone.
Frugal Florida Fun

The origin of SOS
The first recorded use of SOS was Jan. 23, 1909, when a liner called the Republic and an Italian liner called the Florida collided in the dense fog while passing Nantucket.

Swapping gamma rods for better SWR
I chose a point 10cm further at the radiator as resonance will be rising.

China v. Japan
Within a few years we will see the amateur radio market flooded with quality products made in China with low prices.

Software Defined Receivers (SDRs) for the visually impaired
I can say that all the software packages delivered with SDRs have issues and challenges when it comes to using them along with a screen reader.
The SWLing Post

SDR Round-up
New software defined radio (SDRs) products are popping up every few months these days so we thought we’d compile a big list of available SDRs as there are a few people who were bitten by the RTL-SDR bug and are now looking to upgrade.

A serious rift in the core Arduino team
One of the founding team members has gone off on his own, claiming rights to Arduino and starting a separate operation.

What is Skip Signal Fade?
With long distance propagation using ionospheric skip received signals will often fade in and out, being stronger and weaker over the course of a few seconds. What’s the cause of this irregular fading?
Ham Radio School

Did the eclipse affect propagation?
For the full 24 hours of 20th March, Derek G4SWY took world map screen shots of propagation as reported on every 4 minutes on 600, 160, 80 and 40 Meters.


Comparing whip lengths
The end result is you can’t beat more wire in the air.

20 meter contact with the Canary Islands
I came to find that the location I contacted was around 4,300 miles away! That is INCREDIBLE! What a great hobby we are involved in.

New product

Bluetooth microphone for mobile
Compatible with different brands of mobile radio, like Icom, Yaesu, Motorola, Kenwood and more.

Amateur Radio Weekly is curated by Cale Mooth K4HCK. Sign up free to receive ham radio's most relevant news, projects, technology and events by e-mail each week at

Leave a Comment

Subscribe FREE to's
Amateur Radio Newsletter
News, Opinion, Giveaways & More!

Join over 7,000 subscribers!
We never share your e-mail address.

Also available via RSS feed, Twitter, and Facebook.

Subscribe FREE to's
Amateur Radio Newsletter

We never share your e-mail address.

Do you like to write?
Interesting project to share?
Helpful tips and ideas for other hams?

Submit an article and we will review it for publication on!

Have a ham radio product or service?
Consider advertising on our site.

Are you a reporter covering ham radio?
Find ham radio experts for your story.

How to Set Up a Ham Radio Blog
Get started in less than 15 minutes!

  • Matt W1MST, Managing Editor

Sign up for our free
Amateur Radio Newsletter

Enter your e-mail address: