[Elecraft] Antenna Question for KX1

[Chuck]

Is the coax ok?

Add or remove length from antenna. Guessing interaction
between coax & antenna. This should demonstrate that pretty
quick. 

What is the impedance range of auto tuner?


"Don Wilhelm" <w3fpr at earthlink.net> wrote:
__________
>Paul,
>
>A balun may or may not help. and in any case, a balun or
no balun is not the 
>answer to your situation - the 20 ft of coax is acting
like an impedance 
>transformer, and without a thorough analysis of your antenna
and feedline 
>system, it is difficult to say what would help.  Perhaps some
>experimentation is in order - add a 4:1 balun and see what
happens, simlarly 
>try a 1:1 balun, try changing the length of the parallel
feedline, and try 
>changing the length of the coax.  All these things will
influence the 
>results, as will changing the length of the antenna wires.
 If you do not 
>have adequate instrumentation to analyze the system, then
a bit of old 
>fashioned 'cut and try' may be the way to properly answer
your questions - 
>in any case, keep notes of what happens so you will know
which way to go 
>when making future changes.  When you find something that
works, rejoice and 
>let us know, perhaps some of us can give you some info
relating to why it 
>works.
>
>73,
>Don W3FPR
>
>> -----Original Message-----
>>
>> I have been playing with my KX1 in the back yard the
last week or so and 
>> found that about 26ft of wire in the hot side of the bnc
>> connector and about
>> the same to the cold side gets me a good match with the
built in ATU on 
>> 40,30,20m
>>
>> Now if I use the same wires but add 20ft of coax between the
>> radio and these
>> wires I find it very hard to get a match on any band,
do I need to use a 
>> balun at the end of the coax?
>>
>> Any thoughts
>>
>> Paul
>>
>> M0BMN
>>
>>
>
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