[Elecraft] Using the Antenna Tuner in the XPA100

[Fred Jensen]

Mike,

I'll assume you're going to end feed the wire.  The impedance at the end 
of 130 ft will vary all over the place on different bands.  My WOOF 
antenna is 136 ft end-fed through a 9:1 autotransformer ["balun" may be 
the most misunderstood, misused word in Amateur Radio]  The outer 
surface of the coax shield to the rig forms the counterpoise [i.e. the 
"other side of the antenna"]. The ATU in my K3/100 gets a good match on 
all bands up to 6, although I've never gotten an answer from anyone on 6.

That said, our hobby name begins with the word "Amateur."  You can go 
old school and just try it ...

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Mister Mike wrote on 6/30/2022 3:56 AM:
> Hello Elecraft Listies…..
>
> I want to know the best way to use the built-in antenna tuner with a random-length lomg wire (130’).  Inasmuch as the RF output of the tuner is a PL-259 for coaxial cable I would imagine I would use a balun (4:1?) or unun with the shield side to ground and the hot side to the wire.
>
> I have never used an autotuner before.  Thanks for your input.
>
> 73,
>
> Michael, W1RC
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