[Elecraft] Antenna Question for KX1

[Alexandra Carter]

Try taking a big fat toroid from somewhere and looping your coax 
through that about 15 times at the antenna end and see how that works 
for you. Alternately, put a bunch of clip-on beads on the coax at the 
antenna end and try that. Alternately, try lengthening the antenna on 
the 'hot' side as the coax braid may be acting as the ground side. Not 
saying I know, just saying, Try. 73 de Alex NS6Y.

On Apr 30, 2006, at 5:49 PM, Don Wilhelm 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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