The real reason 5/8-wave antennas work so well.

-


 Thanks to Trevor from "Telecom Training" for this excellent discussion of 5/8-wavelength antennas.  

Many radio amateurs say the 5/8-wave antenna is perfect for boosting the performance and range of VHF/UHF antennas.

Trevor does into considerable detail why the 5/8-wave configuration works so well.

This antenna is fairly easy to build and offers improved performance over a 1/4-wave antenna.  

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=yDMNhk71tNQ.

Thanks for joining us today.

Russ (KH6JRM/AL0HA).

Here are some comments from Trevor:

Why are 5/8-wave antennas so popular? Many radio operators claim that 5/8-wave antennas have gain and provide better performance than quarter-wave antennas. But if both antennas are connected to the same transmitter and fed the same amount of power, where does that extra performance come from? In this video, we explore: • Quarter-wave vs 5/8-wave vertical antennas • RF current distribution • Radiation patterns and elevation angles • Phase relationships along the antenna • Why more energy is directed toward the horizon • The truth about antenna gain • What matching coils really do • Why 5/8-wave antennas often outperform quarter-wave antennas You'll learn why a 5/8-wave antenna doesn't create more RF power, but can often place more of that power where many communication systems need it most. This is Trevor from Telecom Training and I'll see you in the next video. #AntennaTheory #HamRadio #RFEngineering ......................................................................................... Learn more about Telecommunications! Get my ebook "Telecommunications Simplified" here: https://amzn.to/3WsNpbF
How this was made
Auto-dubbed
Audio tracks for some languages were automatically generated. Learn more

Ask

Get answers, explore topics, and more

Follow along using the transcript.

Telecom Training

11.9K subscribers

Comments

Post a Comment

Popular posts from this blog

Antenna coax cable window pass through-Radio/TV

-
Image
  Thanks to "Tinker John" (W5CYF) for this inexpensive, homebrewed cable window pass through project. All you need are a few basic tools, bulkhead connectors, and small lumber pieces. If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=KRmbezrkGoc. Thanks for joining us today. Aloha es 73 de Russ (KH6JRM). Here are some comment from "Tinker John" (W5CYF): A simple and effective method of passing coax antenna cable through a window sill. Easy and inexpensive to make. Used for any type of antenna cable including ham radio, TV, CB or SWL. Suggested items that may be related to this video: https://www.amazon.com/shop/w5cyftink... This video shows how to create a window pass-through for coax cables, using readily available materials. The creator demonstrates a simple and inexpensive method for bringing coax cables from the outside into a ham shack, using a piece of printed circuit board and a pin...
Read more

I built a US military TEFV HF Field Antenna

-
Image
  If you want to experiment with unconventional antenna designs, please consider adapting US military HF antennas.  These antennas are easy to build and perform well on several amateur radio bands. In this video, Walt (K4OGO) builds a Terminated End Fed V Antenna (TEFV).  The antenna is broad banded, requires no antenna "tuner", and covers frequencies from 1.8 to 30 MHz. If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=CCmi84GMNJQ. Thanks for joining us today. Aloha es 73 de Russ (KH6JRM). Here are a few comments from Walt (K4OGO): built a US Military TEFV antenna to spec and worked the HF bands #hamradio #portablehamradio #hamradioantenna Link to Palomar Engineers maker of the 12:1 balun and 600 ohm termination resistor: https://palomar-engineers.com Transcript Follow along using the transcript. Show transcript COASTAL WAVES & WIRES 36.3K subscribers Videos About Salty Walt's Patr...
Read more

Build an EASY 6 Meter (50 MHz) Vertical Antenna

-
Image
  Here's another great 6 meter band antenna idea from Hayden (VK7HH). This vertical antenna is based on the "classic Cobra Antenna" described by the late Bill Orr (W6SAI). The antenna is easy-to-make using a few basic tools, a PVC mast, some RG-58 coaxial cable, and a few connectors. This antenna is suitable for both home and portable use. If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=4h7UGNbWmsY. Thanks for joining us today. Aloha es 73 de Russ (KH6JRM). Here are some comments from Hayden (VK7HH): This is a really simple and easy to construct antenna that will get you on the air on the six meter band using only RG-58 coax! I needed a quick and simple antenna for my WSPR beacon over the summer season. Enter the coaxial dipole or aka flowerpot antenna! Buy RG-58 👉 https://geni.us/HCI8NG (Amazon) ► $15 OFF at Radioddity: http://radioddity.refr.cc/haydenvk7hh Above links are affiliate The des...
Read more