Jim
Not asking anyone to debate anything... Just asking for real world
physical measurement that the difference in this particular case is
measurable and significant
I am from Missouri ( really) ...show me
Dave
NR1DX
On 11/7/2020 1:56 PM, Jim Brown wrote:
I will not be drawn into debates about scientific concepts that have
long been well understood.
73, Jim K9YC
On 11/6/2020 12:58 PM, Artek Manuals wrote:
Jim
Show me the ACTUAL antenna range pattern measurement data with and
without the common mode choke on a a similar antenna, with a
reasonable SWR ( LESS THAN 1.5:1) and the feed line has been brought
down perpendicular to the plane of the antenna and I will concede you
the point
Dave
NR1DX
On 11/6/2020 3:37 PM, Jim Brown wrote:
On 11/6/2020 12:28 PM, Artek Manuals wrote:
The short answer is how tight you make the turns will have little
real world effect.
That short answer is WRONG.
Use the RG-8X I would probably use the #31 core over the
43 . The poor mans 8 turns of coax 4-5" in diameter without
ferrites will probably actually work as well.
Define "work." The important thing a choke should do is kill common
mode current on the feedline that couples noise to the antenna and
fills in nulls in the antenna's pattern. That "poor man's" solution
won't do much for that. If "work" means it won't overheat, yes, it
would "work."
Depending on SWR and feed line dressing (always perpendicular to
the plane of the beam the need for choke at all� is arguable
It's arguable only if you don't understand the problem, or don't
care about noise or the antenna's nulls.
73, Jim K9YC
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