[Elecraft] 9:1 Balun

[Lynn W. Taylor, WB6UUT]

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
>