I built an "ugly" air wound balun on a PVC water pipe according to this
description
http://www.hamuniverse.com/balun.html

I get 24 turns on a pipe having 75mm (about 3 inches) diameter measured
outside.

But recently i had the chance to look up the section in the ARRL antenna
book and there the number of windings is considerably smaller at a
higher winding radius.

Which description is right? Or does either have advantages and drawbacks?

Johann Höchtl wrote:

I built an "ugly" air wound balun on a PVC water pipe according to this
description
http://www.hamuniverse.com/balun.html

I get 24 turns on a pipe having 75mm (about 3 inches) diameter measured
outside.

But recently i had the chance to look up the section in the ARRL antenna
book and there the number of windings is considerably smaller at a
higher winding radius.

Which description is right? Or does either have advantages and drawbacks?

The optimum number of turns depends upon the band. Such a balun optimized
for 160m may not be effective on 10m and vice versa. OTOH, ferrite baluns
can be designed to function over a 10:1 frequency range by the proper
choice of the material for the toroid.
--
73, Cecil http://www.qsl.net/w5dxp


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Hello Johann:

Loose the coax Balun, and get a toroid balun.

All the coax Baluns I have used are now used to tie up bushs for pick up
on Thrusdays morning trash pick up.

http://www.amidoncorp.com/aai_cost_baluns.htm

After replacing the coax balun, with the Amodon 1 to 1 HBH50 current
type balun, on my yagi beams it was like night and day. Ten-4.

Jay in the Mojave


Johann Höchtl wrote:

I built an "ugly" air wound balun on a PVC water pipe according to this
description
http://www.hamuniverse.com/balun.html

I get 24 turns on a pipe having 75mm (about 3 inches) diameter measured
outside.

But recently i had the chance to look up the section in the ARRL antenna
book and there the number of windings is considerably smaller at a
higher winding radius.

Which description is right? Or does either have advantages and drawbacks?

Jay in the Mojave wrote:
Hello Johann:

Loose the coax Balun, and get a toroid balun.


After replacing the coax balun, with the Amodon 1 to 1 HBH50 current
type balun, on my yagi beams it was like night and day. Ten-4.

Jay in the Mojave


Did you throw it because of signal loss or because the coax balun did
not worked as expected, so what a balun (balanced -- unbalanced) is
meant to be?

It's not all about that i really need a balun when running a dipole
antenna and rg58 but i fear RIF with neighbors ....

Johann Höchtl wrote:

Jay in the Mojave wrote:

Hello Johann:

Loose the coax Balun, and get a toroid balun.


After replacing the coax balun, with the Amodon 1 to 1 HBH50 current
type balun, on my yagi beams it was like night and day. Ten-4.

Jay in the Mojave


Did you throw it because of signal loss or because the coax balun did
not worked as expected, so what a balun (balanced -- unbalanced) is
meant to be?

It's not all about that i really need a balun when running a dipole
antenna and rg58 but i fear RIF with neighbors ....

Hello Johann:

The Yagi beam antenna with the coax coil balun, showed very little
change in SWR as compared to significant changes in the driven element
lengths. Regardless to the amount of cussing, different type of coax
coiled configurations and such, beer bottles thrown at the tower, or
facing east produced a poor antenna pattern, and signal straight.

When the Amaidon 1 to 1 Current Balun was installed, this all went away.
The SWR could now be changed by lengths in the driven and parasitic
elements, the signal strength went to where is was supposed to,
referenced to a dipole antenna, and the beams pattern sharpen up.

The coiled up coax balun, was allowing RF Energy to travel down the coax
resulting in detuning the antenna significantly.

Jay in the Mojave