Amateur Radio Weekly – Issue 147

Icom previews details of ID-4100E D-STAR VHF/UHF mobile radio
The Callsign routing terminal mode feature will allow each radio to be connected like an access point to the worldwide D-STAR repeater network through the internet.
Southgate

Radio News Magazine archive
Every issue from 1919 to 1959.
American Radio History

How-to: Icom External Keypad
A short press on the M1 to M4 button triggers a single voice keyer send, whereas hold the M1 to M4 button for a second enables auto repeating of sending voice keyer memories.
M1BXF

End Fed Antennas – Where’s the other half?
My favorite tends to be the classic ‘Sloper’ with the feed point located on the ground.
K5ACL

International Radio Network
The IRN (International Radio Network) is a VoIP/RoIP system using Teamspeak 3 (TS3) that allows licensed radio users to talk around the World.
International Radio Network

WSPR Antenna Comparison (Loop vs Dipole vs End Fed)
I did 24 hour WSPR runs using 5 watts of power with each antenna on successive days.
High on Solder

Universal Radio Hacker: investigate wireless protocols like a boss
The Universal Radio Hacker is software for investigating unknown wireless protocols.
Johannes Pohl

Open-air wireless charging
Disney Research has invented a new method of wirelessly charging mobile devices that could someday allow amusement park patrons to walk about freely while also getting their mobile devices charged.
Computer World

Video

Assembling the BITX-40
BITX-40, a QRP, SSB, 10 watt, kit.
KE0OG

Visualising shortwave band activity throughout the year
An animation of 24-hour shortwave spectrum plots from Twente WebSDR.
London Shortwave

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 http://www.hamweekly.com.

One Response to “Amateur Radio Weekly – Issue 147”

  • Andy Choraffa D.phys G3PKW:

    I read the piece about ‘end fed aerials’ from K5ACL. You will also notice that I use the more correct word ‘aerial’ which is derived from the Greek word aero which means from the atmosphere or air. Sadly many continue to use the Latin derived word ‘antenna’ which means a whisker as those things that a moth has on its head. Be that as it may, I also would like to point out that, only in the case of an end fed wire being longer than two wavelengths is it referred to as a ‘long wire’. The reason for this is that a long wire has a completely different polar diagram than a shorter end fed wire. In fact the so called ‘Beverage’ type aerial uses this travelling wave principle to become directional. However, apart from my salient points I enjoyed reading your comments.

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