[Elecraft] Small QRP antenna

[K9MA]

I've had good luck with the end fed 40 M half wave, too.  I use it with 
the KX1 to do CWT's on bicycle tours (in warmer weather).  While the 
transformer and ATU apparently works, I wanted a really good match to 
maximize output power, so I built a small QRP tuner for it:

http://sdellington.us/hr/EFHW_Tuner2.pdf

Most of the parts come from the Pacific Antenna BLT+ kit, which they 
were willing to sell me without the case.

73,

Scott  K9MA



On 12/28/2016 14:56, Fred Jensen wrote:
> The Summits On The Air crowd, at least one of whom "runs" up 
> mountains, has had very good luck with end-fed half-waves.  The 
> transformer weighs next to nothing, and the rest is just wire. 
> Requires no counterpoise, very ground insensitive since it's fed at a 
> voltage node.  Also because of that, you need no coax, just an adapter 
> between rig and transformer.  The higher you can get the middle 
> [current node] the better, but it will work very well with just about 
> any elevation on the far end.
>
> For 40, it's about 67 ft of wire, and is a full-wave on 20 and will 
> work well there.  My KX1, when I still had it, had no problem finding 
> a match.  My HOA-Stealth here at home is an 80-10 EFHW strung about 6 
> ft high along the top of a wooden fence.  Works surprisingly well.
>
> Fred K6DGW
> Sparks NV DM09dn
> Washoe County
>
> --Northern California Contest Club
> --CU in the Cal QSO Party
> --7-8 Oct 2017
>
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-- 
Scott  K9MA

k9ma at sdellington.us