This video illustrates how RF (radio frequency) standing waves are created in transmission lines – through the addition of the forward (transmitted) wave and the reflected wave that results from improperly terminating the line or matching the load or antenna to the transmission line impedance. I have done several videos that relate to transmission lines, terminations and reflections – all of which tell a piece of the story. This video is another piece, and I hope it helps you to understand how standing waves are formed and what the “look” like. This wikipedia link has some great graphics (shown in video)
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Signal Identification Guide “This wiki is intended to help identify radio signals through example sounds and waterfall images. Most signa... Read more
KN-990 Features: 3.5 inch LCD, without touch fuctionFrequency range: Reception: 0.1~30MHztransmitting : Amateur shortwave bandWorking mode: SSB/CW/AM/... Read more
ARRL member Gene Greneker, K4MOG, of Powder Springs, Georgia, recently fulfilled a dream for the Chatham Marconi Maritime Center museum — formerly WCC... Read more
” The next big event will be the ARISS SSTV event that starts Thursday, April 11 about 18:00 UTC and will be operational until about 18:00 UTC o... Read more
1. Contest sponsors The “Soyuz Radioljubitelej Rossii” (Union of Radioamateurs of Russia), SRR is pleased to announce 22 Internatio... Read more
Es’hail-2 is still in a temporary GEO slot, according to the Keps at ~24°E. This is not the final location which planned to be at 26°E The satellite E... Read more
A powerful HF to VHF transceiver from Expert Electronics The SunSDR2 PRO is the latest transceiver from Russian company, Expert Electronics, and packs... Read more
Recent Posts
Signal Identification Guide
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App - Mobile
Yaesu FT817 CAT Control Setup & BT Remote Control | Android
In this video we run through setting up a bluetooth CAT control for the Yaesu FT-817, using an Android Tablet, bluetooth interface, and Yaesus... Read more
RFinder – The World Wide Repeater Directory now supports Twitter!
“RFinder has been the ‘Social Repeater Directory’ for a while now with its support of repeater check-in postings to APRS and... Read more
SmartSDR for iOS v3.4.01 Now Available
FlexRadio Systems announces the release of SmartSDR for iOS v3.4.01 is now available for download or update from the Apple App Store. This App require... Read more
The RS-MS1I APP is now available via the iTunes store
Description Functional overview of the application DR functions You can use some transceiver’s DR functions. Share pictures Send and receive vo... Read more
Ham radio Foundation course for iOS and Android
The Australian Radio & Electronics School (RES) has made available a free 2-3 day amateur radio Foundation licence course App for Apple and Androi... Read more
Equipment
Anker’s massive 120,600mAh portable battery weighs 9 pounds
Most portable batteries pack a few thousand mAh of power into a pocket-sized package. Not this one. It’s an overgrown brute that boasts a ridiculous 1... Read more
New Icom IC-7851
UPDATE 12/19/20114 0704Z Visit for complete information and photos : http://qrznow.com/icom-ic-7851-new-photos-manual/ Icom IC-7851 HF/6m Amate... Read more
Yaesu M-70 | Desktop Microphone
The Yaesu M-70 is a new desk top microphone from Yaesu, it is ideal for the new FT-DX10 model but will function with other Yaesu Models. More info so... Read more
IC-9700 VHF/UHF/23CM All-Mode SDR Transceiver UK Availability and Projected Pricing
IC-9700 Icom Inc. has released more details about the launch of the IC-9700 VHF/UHF/23CM All-Mode SDR Transceiver. Icom plans to release this high-per... Read more
INRAD DMS-650 Desk Microphone
The INRAD DMS-629 and DMS-650 microphones have been chosen by FlexRadio as the official desk microphones for use with all of our transceivers. M629 o... Read more
News
Launch of “SpaceBEEs” Unauthorized, FCC Tells California Technology Developer
On the same launch as an Amateur Radio satellite in January from India, some tiny 0.25 U CubSats called SpaceBEEs — not to be confused with the fantas... Read more
IARU Participation in ITU-Radiocommunication Consultations Called “Mutually Beneficial”
International Amateur Radio Union (IARU) President Tim Ellam, VE6SH/G4HUA, has praised the value of the IARU’s participation over the years in Interna... Read more
Radio Amateur on St. Lucia Relays Reports of Hurricane Devastation on Dominica
As “potentially catastrophic Hurricane Maria” is headed for the Virgin Islands and Puerto Rico. Frans van Santbrink, J69DS, on St. Lucia checked into... Read more
ESA announce competition for Radio Hams
It is time to start listening to space. To celebrate the upcoming launch of the three Fly Your Satellite! student-built CubeSats into low Earth orbit,... Read more
Find an Amateur Radio License Exam in Your Area ( USA )
Find an Amateur Radio License Exam in Your Area Read more
Software
Ham Radio Deluxe Spring Update; New Release. 6.2.9.354
HRD Software, LLC announces the release of Version 6.2.9.354 today. This is a maintenance release for HRD that addresses a variety of bug fixes in Log... Read more
Release of SDRconsole v3, called Preview 6
Preview 6, June 16th 2017 What’s New A lot of new features, for example: Airspy server Recording sceduler Signal history Receiver pane Schedule... Read more
Icom IC-R30 Firmware Update (Version 1.05)
Icom Inc. has released a firmware update for the IC-R30 Wideband Communications Receiver. The firmware update fixes an issue where the received channe... Read more
Ham Radio Deluxe – November Update
Ham Radio Deluxe The HRD team is pleased to announce a new website at http://www.ham-radio-deluxe.com. In order to provide easy access to information... Read more
