BALUN ??
 

Hi, group. I'm considering an attempt at building a quad antenna for 11
meters.
The plans I have, leave some of the details to the builder.
It's my understanding that the driven element needs to be fed VIA a balun.
I emailed a person with baluns "for sale" listed on ebay. He replied that he
thought I needed a 4:1 balun for a quad.
It's was my understanding that the balun should be a 1:1 ??

Anyone in the group care to advise me on this question ??

Any help and /or advise on the building of the 4 element 11 meter Quad would
be appreciated :-) !!

Thanks

Johnny

Unless you go the route of feeding with twin lead and a tuner (and, yes I
know several local hams that do so successfully), then you need to back up
and look at the impedance of your driven loop, and the impedance of your
feedline - a balun, if used, will match those two impedances. For example,
a 300-ohm element with 50-ohm coax would require a 6:1 balun.

Hope that helps. Good luck!

73,
KI6PR
El Rancho R.F., CA

"Johnny V. Mullins" wrote
Hi, group. I'm considering an attempt at building a quad antenna for 11
meters.
The plans I have, leave some of the details to the builder.
It's my understanding that the driven element needs to be fed VIA a balun.
I emailed a person with baluns "for sale" listed on ebay. He replied that
he
thought I needed a 4:1 balun for a quad.
It's was my understanding that the balun should be a 1:1 ??

Anyone in the group care to advise me on this question ??

Any help and /or advise on the building of the 4 element 11 meter Quad
would
be appreciated :-) !!

Thanks

Johnny

An additional comment. Are you aware that Cubex is now offering 11-meter
quads? Conversely, are you aware that there are a number of good books on
quad theory and construction? Just trying to help...

- KI6PR
El Rancho R.F., Ca

"Johnny V. Mullins" wrote
Hi, group. I'm considering an attempt at building a quad antenna for 11
meters.
The plans I have, leave some of the details to the builder.
It's my understanding that the driven element needs to be fed VIA a balun.
I emailed a person with baluns "for sale" listed on ebay. He replied that
he
thought I needed a 4:1 balun for a quad.
It's was my understanding that the balun should be a 1:1 ??

Anyone in the group care to advise me on this question ??

Any help and /or advise on the building of the 4 element 11 meter Quad
would
be appreciated :-) !!

Thanks

Johnny

"Mikey" wrote in message
...
Unless you go the route of feeding with twin lead and a tuner (and, yes I
know several local hams that do so successfully), then you need to back up
and look at the impedance of your driven loop, and the impedance of your
feedline - a balun, if used, will match those two impedances. For
example,
a 300-ohm element with 50-ohm coax would require a 6:1 balun.

A full wave loop should come in right around 50 ohms.

Just go and feed the wires direct, no balum needed at all. Works just
fine with out all that crap.

"Hacksaw" wrote in message
news:z69rb.107068$ao4.322274@attbi_s51...
Just go and feed the wires direct, no balum needed at all. Works just
fine with out all that crap.

Until you start wondering why you have so much RF in the shack, and why you
don't get the directivity you ought to..

Your inability to see the difference does not mean that there is no
difference.

We have built Quads for thirty years, and NO ****ing Balun was ever needed.
Go and read the books there mentioned. Needing a balun is bull **** ad you
must be brainwashed on all that crap. Some say not to eat bad food also, but
it all bad. Yes some books say to use a balun, and say all things about how
bad it is, but in expirence not much difference was found.
Read the history on the first Quad , they did not build a balun. In fact
we have tested some Quads using 10,000 watts, 40 meters, and there was no
balun available for that power, and guess what there was hardly no power
coming back either, F/D was great. Used that for four years.
Look at some of the two meter quads driven elements, or some of the 432
driven elements or 1296 loop yagi NO balun was used either.
Amazing .




"Dave VanHorn" wrote in message
...

"Hacksaw" wrote in message
news:z69rb.107068$ao4.322274@attbi_s51...
Just go and feed the wires direct, no balum needed at all. Works just
fine with out all that crap.

Until you start wondering why you have so much RF in the shack, and why
you
don't get the directivity you ought to..

Your inability to see the difference does not mean that there is no
difference.

Hacksaw,
Congratulations! You made it.
'Doc

Still going and going



"'Doc" wrote in message ...


Hacksaw,
Congratulations! You made it.
'Doc

"Hacksaw" wrote in message
news:FLBrb.116585$ao4.357305@attbi_s51...
We have built Quads for thirty years, and NO ****ing Balun was ever
needed.

I'm sorry.


Your inability to see the difference does not mean that there is no
difference.