On Mon, 2 Aug 1999 12:00:34 EDT N6CW@aol.com writes:
>Thanks for the info on buluns. A quick couple of questions. While it
>is easy to wind a balun on a 4 or 6 inch form, what do we do with it
>once we have it?
I wound a choke for my 2L40 on a 3 Liter Coke bottle
and suspended in below the boom using tie-wraps
and tape. N4KG
>Would it degrade the balun by mounting the balun with the antenna mast
>or boom running through it? I suspect not.
Unfortunately, it will degrade performance. N4KG
This would allow a way to support the balun and not have a big blob
hanging off the antenna.
Understand. Mechanically good but electrically bad. N4KG
Or how about if you had a 4 inch boom, could you just wind the
balun around it or even hang it through a 2 inch boom?
The closer the choke is to the metal, the more it
couples (capacitively) and the greater the degradation.
Or since I have a tubular tower with a 4 inch square top section
could I just wind it around that section.
This would be better than winding it on a 4 inch metal
cylinder, especially if you spaced it away from the tower.
But still not at good as if it were not wound around the tower.
Also do you have info for a 80 meter dipole? 24 turns on 4 inch tube?
Dunno...I had a problem with an 80M dipole being detuned
after I installed a 3L20 at the mid point of the 130 ft tower.
Apparently there was an 80M resonance between the top
and bottom beams which were separated by 70 ft and end
loaded by the beams.
You might want to go to a larger tube to reduce the number
of turns needed. Believe there is some 6 inch PVC or other
type of tube available. N4KG
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