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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The ARRL Public Relations Committee is seeking nominations for the 2018 Bill Leonard Award, which recognizes this year’s best newspaper, radio, or tel... Read more
” When properly installed on your vehicle this antenna will provide continuous coverage from 7.0 to 54 MHz with the supplied whip. The Li... Read more
WSJT-X A new WSJT-X “release candidate,” version 2.0.0-rc4, now is available, and the version 2.0 Quick Start Guide has been revised and extended. The... Read more
With 4 RF bands and multi-mode system access, the APX 8000 knows no limits when it comes to interoperability. Whether it’s loud or windy, wheth... Read more
On November 22, 2015 SSTV and Digitalker transmissions were made from the SPROUT amateur radio satellite on 437.600 MHz FM (+/- 9 kHz Doppler shift).... Read more
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App - Mobile
New APP for digital QST
Apple has released a new app for digital QST (version 5.1) readers that use that platform. A long-standing problem involved the inability of some Appl... Read more
MacLoggerDX HD for iPad
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SmartSDR for iOS v2.6.2 Now Available
FlexRadio Systems announces the release of SmartSDR for iOS v2.6.2 is now available for download or update from the Apple App Store. This App requires... Read more
RFinder – The World Wide Repeater Directory kicks BrandMeister up a notch. DMR without CodePlugs!
RFinder has worked with the DMR network Brandmeister to create new usability enhancements. The new dashboard just released includes coverage maps gene... Read more
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Equipment
KAT500 High-Power Auto-Tuner & Smart Antenna Switch
The KAT500 is a high power autotuner that can be used with both the K3/KPA500 and all other HF amplifiers and transceivers. The KAT500 uses the same... Read more
DZKit Sienna HF Receiver/Transceiver Kit
True kit – soldering required (about 40 hours to build boards, assemble, cal and test) Modular (start small, add modules as your budget allows)... Read more
![Icom IC-7851 vs IC-7800 [ Video ]](https://qrznow.com/wp-content/uploads/2015/04/ic7850_icom-190x122.jpg)
Icom IC-7851 vs IC-7800 [ Video ]
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LDG RT-100 Remote Tuner
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Zhong Xing Power Amplifier – HF2013DX
Zhong Xing Power Amplifier Since 2010 with advanced technologies and selected materials, we began to manufacture Zhong Xing Power Amplifiers fo... Read more
News
National Parks on the Air Contact Tally Tops 1 Million!
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In the modulation process, the baseband voice, video, or digital signal modifies another, higher-frequency signal called the carrier, which is usually... Read more
Break-In Magazine – ZL National Amateur Radio Society
As an NZART member you support the ranks of thousands of other ham radio enthusiasts shaping the Amateur Radio service today. If you consider yourself... Read more
A Beginner’s Guide to Making CW Contacts
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Software
SmartSDR v2.1.33 Now Available
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Ham Radio Deluxe Version 6.3.0.563
HRD Software, LLC announces the release of Version 6.3.0.563 as a maintenance release. Everyone that has purchased HRD since February 2012 will get th... Read more
HDSDR publishes a new Beta release
HDSDR is a freeware Software Defined Radio (SDR) program for Microsoft Windows 2000/XP/Vista/7/8/8.1/10. Typical applications are Radio listening, Ham... Read more
