Author Topic: How a BALUN effects a Ham Radio system , short video  (Read 3475 times)

Offline Carl

  • Mr HamTastic!
  • Forum Veteran
  • *********
  • Posts: 13105
  • Karma: 716
  • COW?...No ,I haven't seen your cow.
How a BALUN effects a Ham Radio system , short video
« on: August 25, 2016, 01:56:24 PM »
This demonstrates the effect of a one to one balun on transmitted and received signals on a properly cut dipole..
Also note that my,often suggested 4 to 1 balun adds the ability to tune a wider mismatched antenna.

https://www.youtube.com/watch?v=QFOx7vjchy0&feature=youtu.be
\
SMURF HUNTER credit for locating this informative video.

Offline idelphic

  • I Zgjuari I DynjasĂ«
  • Dedicated Contributor
  • ******
  • Posts: 1903
  • Karma: 44
  • Theoretical Conceptualist - Avatar by Ada
Re: How a BALUN effects a Ham Radio system , short video
« Reply #1 on: August 25, 2016, 06:07:59 PM »
Curious...  I suppose I'll have to add one or two the kit.. have to look at how to make since they seem so expensive

Offline Carl

  • Mr HamTastic!
  • Forum Veteran
  • *********
  • Posts: 13105
  • Karma: 716
  • COW?...No ,I haven't seen your cow.
Re: How a BALUN effects a Ham Radio system , short video
« Reply #2 on: August 25, 2016, 06:18:57 PM »
Curious...  I suppose I'll have to add one or two the kit.. have to look at how to make since they seem so expensive

Several choices of ready made baluns for $30 or so at R and L Electronics...

http://www.randl.com/shop/catalog/index.php?cPath=1970
\

Other options are snap on ferrite beads or a common mode choke (5 to 7 coils 5 inch diameter loops of coax taped together ) but the balun tends to do a better job.

http://www.dj0ip.de/vertical-antennas/rf-cmc-choke/
« Last Edit: August 25, 2016, 06:30:46 PM by Carl »

Offline Greekman

  • Survival Demonstrator
  • *******
  • Posts: 4050
  • Karma: 207
  • New TSP Forum member
Re: How a BALUN effects a Ham Radio system , short video
« Reply #3 on: September 01, 2016, 07:12:44 AM »
This demonstrates the effect of a one to one balun on transmitted and received signals on a properly cut dipole..
Also note that my,often suggested 4 to 1 balun adds the ability to tune a wider mismatched antenna.

https://www.youtube.com/watch?v=QFOx7vjchy0&feature=youtu.be
\
SMURF HUNTER credit for locating this informative video.

IZ2UUF strikes again!
he is the guy I copied my Yagi from, he modeleld an easy made 4 element 50Ohm yagi

Offline Smurf Hunter

  • Survival Veteran
  • ********
  • Posts: 7172
  • Karma: 334
Re: How a BALUN effects a Ham Radio system , short video
« Reply #4 on: September 01, 2016, 10:24:55 AM »
While I think building a homemade balun could be a worthy educational experiment, they materials cost are close to the retail price of $30.

Add up the PVC end caps, eye bolts, etc.  You might be surprised what that stuff costs at your local home improvement store.

Offline Carl

  • Mr HamTastic!
  • Forum Veteran
  • *********
  • Posts: 13105
  • Karma: 716
  • COW?...No ,I haven't seen your cow.
Re: How a BALUN effects a Ham Radio system , short video
« Reply #5 on: September 01, 2016, 12:26:21 PM »
While I think building a homemade balun could be a worthy educational experiment, they materials cost are close to the retail price of $30.

Add up the PVC end caps, eye bolts, etc.  You might be surprised what that stuff costs at your local home improvement store.

I used to make "J" pole antennas for two meters with 1/2" hard drawn copper pipe (10 feet) but now the cost of copper is many times what it used to be
\and this prompted me to design the Big Stick from mostly PVC and now even the plastic PVC cap costs nearly as much as the full length of plastic pipe.
Stuff is costly these days,it pays to shop around.