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Old October 14th 03, 03:42 AM
PDRUNEN
 
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Default off-center dipole

Hi Group,

In the process of fab'ing a off-center dipole. The short end is 40 feet and
the long end is 80 feet. At the feed point I have a 4:1 balun. The balun I
purchased new, I believe it has w2un on the side of it. I don't have it here
at the computer.

The question is what side of the 4:1 should I feed the long end, or does it
matter?

Paul
KJ4UO

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Old October 14th 03, 12:49 PM
Thomas C. Sefranek
 
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"PDRUNEN" wrote in message
...
Hi Group,

In the process of fab'ing a off-center dipole. The short end is 40 feet

and
the long end is 80 feet. At the feed point I have a 4:1 balun. The balun

I
purchased new, I believe it has w2un on the side of it. I don't have it

here
at the computer.

The question is what side of the 4:1 should I feed the long end, or does

it
matter?


Why do you believe you need a 4:1 balun?
(The fritzel Off-center feed dipole uses a 6:1)
Have you measured the feedpoint?
(It's so much better to work with facts rather than myth.)

As to your "side" question, what "side" does any transformer use?

Paul
KJ4UO



--
*
| __O Thomas C. Sefranek
|_-\,_ Amateur Radio Operator: WA1RHP
(*)/ (*) Bicycle mobile on 145.41, 448.625 MHz

http://hamradio.cmcorp.com/inventory/Inventory.html
http://www.harvardrepeater.org


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Old October 14th 03, 12:54 PM
Dave Shrader
 
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DOESN'T MATTER

PDRUNEN wrote:

Hi Group,

In the process of fab'ing a off-center dipole. The short end is 40 feet and
the long end is 80 feet. At the feed point I have a 4:1 balun. The balun I
purchased new, I believe it has w2un on the side of it. I don't have it here
at the computer.

The question is what side of the 4:1 should I feed the long end, or does it
matter?

Paul
KJ4UO


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Old October 16th 03, 10:02 PM
Serge Stroobandt, ON4BAA
 
Posts: n/a
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Hello Paul,

If it is a true balun, it does not matter.
However out of proper experience, I would recommend using an additional 1:1
current balun between your (voltage?) balun and the coax.

Although a 6:1 balun offers more possibilities, I also had to design an
off-center fed dipole around a 4:1 balun I had at hand.
You can find design details he http://salsawaves.com/antennas/windom.html

73 de Serge ON4BAA - HB9DWU



"PDRUNEN" wrote in message
...
Hi Group,

In the process of fab'ing a off-center dipole. The short end is 40 feet

and
the long end is 80 feet. At the feed point I have a 4:1 balun. The balun

I
purchased new, I believe it has w2un on the side of it. I don't have it

here
at the computer.

The question is what side of the 4:1 should I feed the long end, or does

it
matter?

Paul
KJ4UO





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