That's the problem with oversimplifying an explanation.
I read the original as "is it best practice to always use a 9:1 balun"
and the answer of course is, "if you don't need a 9:1 impedance
transformation, then you don't need a 9:1 balun."
73 -- Lynn
On 1/31/2017 5:17 PM, K9MA wrote:
On 1/31/2017 19:03, Lynn W. Taylor, WB6UUT wrote:
If I did the math right (always a question) your load must be between
about 5 ohms and 500 ohms, so if your antenna is about 400 ohms (not
resistance, but impedance) then you're okay.
Not necessarily. That 400 Ohms could be almost pure reactance, like
1+j399.999, an almost infinite SWR. That's why ATU specs call out the
SWR range. Even then, that might be for mostly resistive loads, as
it's really hard to specify the whole range of impedances an ATU can
match.
73,
Scott K9MA
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