Even Jasik, ed., "Antenna Engineering Handbook" mentions the balun. My
first ham antenna (1952) was a 40 meter dipole fed with 72-ohm twinlead
and a B 1:1 air-core balun and I once worked on an airborn military
system which used a balun.
The term "unun" has a much more dubious justification,
BTW, don't look at the BL2 to help with any CMI, it doesn't do a very good job.
Mel, K6KBE
From: Clay Autery <caut...@montac.com>
To: elecraft@mailman.qth.net
Sent: Tuesday, May 23, 2017 6:14 PM
Subject: Re: [Elecraft] BL2 -- Antenna Balun Usage
You missed my point... I'm gon
You missed my point... I'm gonna let it go, because it's just not that
important to argue the point here.
73,
__
Clay Autery, KY5G
On 5/23/2017 11:45 AM, Lynn W. Taylor, WB6UUT wrote:
> Terminology does count, especially in technical areas, like radio.
>
> If you ask to
Since a truck can be defined as a wheeled vehicle for moving (heavy) loads, many
variations exist.
Likewise, a balun can be defined as a device for converting from a single-ended
to a balanced source/load and many variations exist.
The fact that both terms are all-inclusive doesn't negate
I was going to respond to Jim’s comments about terminology, but Wes presented
my thoughts better than I could have.
I would like to address two of the comments that were made in the responses.
First, EZNEC is powerful tool that can help understand theoretical behavior
of ideal antenna systems.
Terminology does count, especially in technical areas, like radio.
If you ask to borrow my truck, and I say "yes" and hand you my
hand-truck (two-wheeled dolly) it's probably not what you were thinking.
On 5/22/2017 10:19 PM, Clay Autery wrote:
How about not worrying what to call it, period?
How about not worrying what to call it, period?
Just realize that the entire assembly from the antenna connector on the
transceiver to the connector on the driven element is simply an
Impedance Matching Network (or Assembly if you prefer or even Impedance
Matching Device, because all of
On Mon,5/22/2017 10:07 PM, Wes Stewart wrote:
PLEASE ignore all of Jim's pontification.
Then YOU take responsibility for teaching everyone how they work.
73, Jim K9YC
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Elecraft mailing list
Home:
That is one, but far from the only form of a balun.
A single-ended input, differential output amplifier is a balun for example.
Wes N7WS
On 5/22/2017 2:42 PM, Ron D'Eau Claire wrote:
It is useful to remember that a so-called "balun" is nothing more than a length
of transmission line - most
PLEASE ignore all of Jim's pontification.
I find it curious that Terman ("Radio Engineering"), Kraus ("Antennas"), Johnson
("Transmission Lines and Networks") all use the "meaningless" word "balun" in
their books. Clearly, these guys should have consulted with Jim before doing so,
because
: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill
Leonard N0CU
Sent: Monday, May 22, 2017 12:42 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] BL2 -- Antenna Balun Usage
I am no expert when it comes to baluns, but here are several comments that are
based upon som
On Mon,5/22/2017 12:42 PM, Bill Leonard N0CU wrote:
I am no expert when it comes to baluns
You're not the only one. :)
Some important comments. First, PLEASE strike the word "balun" from your
vocabulary. It is a meaningless word that tells us NOTHING about the
device or circuit element it
I am no expert when it comes to baluns, but here are several comments that
are based upon some research that I have recently done on the subject:
1) Now, unlike in the past, the most commonly used balun is the current
balun. Most current baluns use some type of transmission line (if they do,
they
Balun ratings are for a 1:1 SWR. My experience has been that when the
impedance gets very reactive, baluns heat up more. I had a 5 kW DXE
balun get too hot to touch with around 1 kW in such a situation.
Canceling the reactance on the open-wire line side of the balun made it
run cool.
> Quoted from Fred (“Skip”) K6DGW…
> (1) The MFJ-259x series of antenna/feedline analyzers havean N coax
> connector. Using the BL2, you can connect it to the balanced ladder line. How
> were you planning to connect it without the balun? As you state it, it does
> not sound like a reasonable
Just to add to one extra reply.
Z readings from 259B or VA1 are inaccurate. SWR measurement is pretty good,
though.
BL2 balun is very good in transforming 200 to 50 or 50 to 50. It is hard to
figure out exactly what is does outside the range.
When BL2 is not hot, it is good enough. Whether it
Hi Phil,
(1) The MFJ-259x series of antenna/feedline analyzers havean N coax
connector. Using the BL2, you can connect it to the balanced ladder
line. How were you planning to connect it without the balun? As you
state it, it does not sound like a reasonable experiment design.
(2) The
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