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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Vertex VXD-720 Clear, Quality Communications 512 Channels and 512 Groups 5 Watts VHF / 4 Watts UHF VHF: 136 – 174 MHz UHF: 403 – 470 MHz; 450 – 512 MH... Read more
DV4mobile – first all mode digital tri band transceiver plus LTE with GPS The DV4mobile supports all digital modes: no need for multiple radios, savin... Read more
2-Element parasitic Yagis by DK7ZB for the Shortwave-Bands 10m-30m No other antenna has a better relation between gain and expense than the 2-E... Read more
An Excellent Dual Band Yagi for 50/70MHz with 1.2m boom Model: DB-664 A dualband balun is recommended for this antenna, details can be found HERE The... Read more
ARISS will conduct a test of the “Ham Video” digital Amateur Radio television transmitter on the Columbus of the International Space Station on Friday... Read more
Today, January 18th, New Technical Requirements has been published from Bulgarian Ministry of Communication. Thanks to the great commitment of BFRA n... Read more
Recent Posts
Vertex VXD-720
DV4mobile – first all mode digital tri band transceiver plus LTE with GPS
2-Element parasitic Yagis by DK7ZB – 10 15 20 30 meters
3/3 (6) element 50/70MHz Yagi (1.2m)
ARISS to Conduct Digital Amateur Radio TV Transmitter Test on June 1
New Technical Requirements in Bulgaria
App - Mobile
QRZ.com App for Android now in Beta Testing
The updates to QRZ’s Android App, formerly known as QRZDroid have been released and are available to those who are interested in trying it out.... Read more
RUMlogNG2Go for iOS version 3.3 now available
Thomas Lindner, DL2RUM, is happy to announce the availability of version 3.3 of his RUMlogNG2Go logger for the iPhone and iPad. RUMlogNG2Go can be do... Read more
New! RemoteHamRadio App
Hold a mega-station in the palm of your hand. Wherever you are, you can work DX and log it. Operate from our 18 unique stations to snag a new country,... Read more
Morse Intercom – APP
Features:i) Send Morse to, and receive Morse from, other users of the app. Restrict usage to your WiFi network, or allow full Internet connecti... Read more
CommCat 4 for Radio Control and Logging!
CommCat 4 is a radio control and logging program for radio amateurs who share a passion for talking to other hams around the world. CommCat works with... Read more
Equipment
CD-45II METERED ROTATOR W/FRICTION BRAKE 8.5 SF MT N TOWER
The CD-45II handles 8.5 sq. feet mounted inside a tower, or 5 sq. ft. with mast adapter. Low temperature grease good to -30 F degrees. Bell rotator de... Read more
Aerial-51 SKY-SDR
GENERAL TRANSCEIVER SPECIFICATIONS Technology Solid State SDR-DSP Direct Conversion Frequencies / Bands 1.8 MHz to 54.0 MHz 160, 80, 60, 40, 30, 20,... Read more
Heil PR 10 Set
Heil PR 10 Set From the amateur radio division of Heil Sound, Ltd., we bring you the Heil PR10 Package. This small but mighty microphone will bring yo... 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
Mobile Communications Center – Go Box by KI6AIX
Designed and built by Dennis, KI6AIX. This Mobile Comm Center features VHF and UHF two-way radios, a scanner, internal battery or power supply.... Read more
News
Joe Walsh WB6ACU Start in Ham Radio: Ham Nation 144
Joe Walsh Best known for his powerful guitar licks, Joe Walsh has entertained the masses and captivated his peers for more than four decades with such... Read more
Three new CubeSats now in orbit
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5 MHz – HA land issues temporary permits for 5350 to 5450 kHz
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Waters & Stanton announce the new Apache Labs Anan 8000DLE – the Ham Radio Transceiver of 2017
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Man arrested under the Wireless Telegraphy Act
Police in Edinburgh have arrested and charged an 18-year-old man for over twenty offences committed under the Wireless Telegraphy Act. The crim... Read more
Software
SDRuno V1.22 has now been released
SDRuno Download This version contains the following changes and bug fixes… Added • Support for 1366×768 default layout • ADC overload detection... Read more
New MSHV version 1.62 with FT8 , JT65 and more
MSHV Supported working modes: MSK144 JTMS FSK441 FSK315 ISCAT JT6M FT8 JT65 PI4 MSHV Developed by LZ2HV – Christo Tested by SP9HWY – Jurek... Read more
HamRacer – The hands-on software for passionate CW and SSB contesters
The hands-on software for passionate CW and SSB contesters. It contains the world-unique synthesized voice keyer. No need to record anything to your v... Read more
Ham Radio Deluxe 6.4.0.805 Released
he second release of Ham Radio Deluxe for 2018 is now available for download. Please download it from the Download pages on our website at: www.Ham-Ra... Read more
