Ham Radio How To: Random Wire Antenna.

by kc4mcq | Posted on


 

A random wire antenna, properly designed and matched to your transceiver, can deliver hours of DX contacts at minimal cost.

In this video, Michael Martens (KB9VBR) shows us how to design, build, test, and use this "classic" antenna design.  The key to operational efficiency for this antenna is a 9:1 transformer and a FT-140 3 mix Ferrite Toroid.

Michael takes us step-by-step through the building of the 9:1 transformer.

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

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Here are a few comments from Michael (Kb9VBR):

Can a non resonant antenna be efficient? It sure can. I show you how to build a non resonant random wire antenna with a 9:1 transformer. FT-140 43 mix Ferrite Toroid: https://www.mouser.com/ProductDetail/... Toroid Core FT140-43 Ferrite: https://amzn.to/3WKPApC 18ga Enameled Magnet Wire: https://amzn.to/3WFhSBX 4 in. x 4 in. x 2 in. PVC Junction Box - Gray: https://www.homedepot.com/p/Carlon-4-... Homebrew Antenna Challenge:    • Amazing! We built antennas out of ran...   Random Wire end fed antenna resources: https://toroids.info/FT140-43.php https://sprott.physics.wisc.edu/techn... https://udel.edu/~mm/ham/randomWire/ https://m0ukd.com/homebrew/baluns-and... Like what you see? You can leave me a tip: https://www.paypal.me/kb9vbr KB9VBR VHF/UHF Antennas: http://www.jpole-antenna.com Become a patron! Unlock exclusive content at:   / kb9vbrantennas   Support Ham Radio Q&A by shopping at Amazon: http://amzn.to/2kO6LH7 Timestamp 00:00 Introduction 00:33 End Fed Antennas 01:22 Random wire antennas: long wire or end fed Zepp 03:11 Wire Lengths are important 04:09 Ferrite cores and wire 06:55 Building the 9:1 transformer 09:28 Installing the antenna 11:05 Testing and making contacts 15:12 Advantages and Disadvantages of non resonant antennas My Parks on the Air setup: Transceiver: https://amzn.to/3lmHoei Battery: https://amzn.to/3xBGgbv Tuner: https://amzn.to/2ZCNM9l Folding Table: https://amzn.to/3xFIp5Z Throw Weight: https://amzn.to/32QW2nB Video Production Equipment: Camera https://amzn.to/32UaXNX Lens https://amzn.to/31mmDrX Wireless Microphone: https://amzn.to/3xFVBb4 Microphone: https://amzn.to/3daoAdq GoPro: https://amzn.to/3pkmP30 Music by license: http://www.premiumbeats.com http://www.soundstripe.com As an Amazon Associate, I earn from qualifying purchases Contact Information: Questions, comments, or business inquiries may be directed to kb9vbr@jpole-antenna.com. If you wish for your product to be featured on my channel, please contact me. #hamradio #amateurradio #hamradiohowto #antenna #antennaproject #nonresonantantenna #randomwireantenna #endfedantenna #efhw #endfedhalfwave #balun #unun #9to1transformer

Introduction

0:00

End Fed Antennas

0:33

Random wire antennas: long wire or end fed Zepp

1:22

Wire Lengths are important

3:11

Ferrite cores and wire

4:09

Building the 9:1 transformer

6:55

Installing the antenna

9:28

Testing and making contacts

11:05

Follow along using the transcript.

KB9VBR Antennas

66K subscribers
Show less


About the author

文 » A