"Baluns: What They Do and How They Do It", from the _ARRL Antenna
Compendium_, Vol. 1 is now available on line at
http://eznec.com/Amateur/Articles/Baluns.pdf.

Roy Lewallen, W7EL

Thanks Roy, your article is a keeper. I'm gonna fire up the soldering iron,
grab some #43 cores, and build me up a current balun or two for my listening
setup.

73,
John


"Roy Lewallen" wrote in message
...
"Baluns: What They Do and How They Do It", from the _ARRL Antenna
Compendium_, Vol. 1 is now available on line at
http://eznec.com/Amateur/Articles/Baluns.pdf.

Roy Lewallen, W7EL

"Roy Lewallen" wrote in message
...
"Baluns: What They Do and How They Do It", from the _ARRL Antenna
Compendium_, Vol. 1 is now available on line at
http://eznec.com/Amateur/Articles/Baluns.pdf.

Roy Lewallen, W7EL

Thanks Roy

You are a truely helpfull guy and I appreciate your efforts.

Jerry

Thanks, but I want to thank the ARRL. I recently enquired and discovered
they generously grant blanket permission for authors of articles in
their publications to reproduce the articles on their own web sites. So
I'll be adding more to my web site as I have time to scan them in. I
hope the articles will prompt some readers to buy some of the
publications to see some of the other interesting and informative things
which have been and are being written. And to support the League's
ability to continue publishing. Contrary to growing popular belief, only
a tiny fraction of the good information that exists is on the web.

Roy Lewallen, W7EL

Jerry Martes wrote:
"Roy Lewallen" wrote in message
...

"Baluns: What They Do and How They Do It", from the _ARRL Antenna
Compendium_, Vol. 1 is now available on line at
http://eznec.com/Amateur/Articles/Baluns.pdf.

Roy Lewallen, W7EL


Thanks Roy

You are a truely helpfull guy and I appreciate your efforts.

Jerry

Roy Lewallen wrote:
"Baluns: What They Do and How They Do It", from the _ARRL Antenna
Compendium_, Vol. 1 is now available on line at
http://eznec.com/Amateur/Articles/Baluns.pdf.

Roy Lewallen, W7EL


Well, thank you so much Roy! It's appreciated.

You are an asset to the radio community.

Lee C. KA0FPJ

Excellent article! It really did a good job of explaining why the
current path on the outside of the coax exists and causes problems.
Also an excellent description of the various types of baluns that had
this rookie puzzled.

More please!

jtm

On 19 Mar 2005 08:37:07 -0800, "Jim Miller" wrote:

Excellent article! It really did a good job of explaining why the
current path on the outside of the coax exists and causes problems.
Also an excellent description of the various types of baluns that had
this rookie puzzled.

More please!

jtm
Yes, Roy's article in the Compendium is excellent, as are all of Roy's
contributions to our art. In his article he referenced my work with
baluns, which appeared in QST for March 1983. This article is also
available on my web page at www.w2du.com for those who don't have a
copy of that issue of QST.

Walt Maxwell, W2DU

"Walter Maxwell" wrote
Yes, Roy's article in the Compendium is excellent, as are all of Roy's
contributions to our art. In his article he referenced my work with
baluns, which appeared in QST for March 1983. This article is also
available on my web page at www.w2du.com for those who don't have a
copy of that issue of QST.

Walt Maxwell, W2DU

Walt & Roy, thank you both very much for your lifetime of service to radio.
Have either of you analyzed any the numerous popular Radio Works "Current
Baluns"? I was advised many years ago that the current-type balun was more
effective for use with a dipole, and have used Radio Work's baluns on both
dipole and random wires with success. But my measure of success is not
analytical, as your studies have been. Operating a center-fed dipole at it's
resonant frequency, slightly below that, and significantly above it, are the
specific inquiries wrt current baluns - would a voltage balun be more
effective in any of those conditions? Radio Works current baluns the same
kind used in your studies?

Thanks for your comments, and the great participation of all in this group.

Jack Painter
Virginia Beach, Virginia

On Sat, 19 Mar 2005 14:38:32 -0500, "Jack Painter"
wrote:

would a voltage balun be more effective in any of those conditions?

Hi Jack,

The typical Voltage BalUn is constructed in such a way that one lead
violates the isolation offered by the Current BalUn method. There are
examples found for the same application of the 4:1. One is the
Guanella, the other is the Ruthroff. If you examine the Ruthroff
model, you will notice that one lead of the load (antenna) is
connected directly to the source without a choking intervention. On
the other hand, both leads are choked by the Guanella.

By common usage, the Guanella is generally described as a Current
type, where as the Ruthroff is described as a Voltage type BalUn.
Current or Voltage, the more important feature is in the choking.

73's
Richard Clark, KB7QHC

"Richard Clark" wrote
"Jack Painter"
wrote:

would a voltage balun be more effective in any of those conditions?

Hi Jack,

The typical Voltage BalUn is constructed in such a way that one lead
violates the isolation offered by the Current BalUn method. There are
examples found for the same application of the 4:1. One is the
Guanella, the other is the Ruthroff. If you examine the Ruthroff
model, you will notice that one lead of the load (antenna) is
connected directly to the source without a choking intervention. On
the other hand, both leads are choked by the Guanella.

By common usage, the Guanella is generally described as a Current
type, where as the Ruthroff is described as a Voltage type BalUn.
Current or Voltage, the more important feature is in the choking.

73's
Richard Clark, KB7QHC

Thanks Richard. I have never seen the internal construction of the Radio
Works BalUn, but it is claimed to be a current-type device. It's function
as a choke was the only reason for including it in the designs of my antenna
systems. I see that Reg as well as yourself remind us that is indeed their
primary purpose. Too bad so many may have been fooled into using
voltage-type baluns when that appears to be an inappropriate choice for may
applications. I was curious what applications would benefit from such a
voltage-balancing device.

Jack