Ahh! Much better!
All I have to do is to cancel out this reactance. An easy task. It looks like a winner to me. I am not too worried about the bandwidth. My main concern is that it's ressonant around 7.1 MHz, so I can go up and down a little bit. 40m SSB DX occurs mainly between 7050 and 7100, at least outside the US.
Thank you so much, skywave. This kind of uninterested help is becoming rarer and rarer nowadays, unfortunately. Wish you and yours all the best. And lots of antenna building!
In case you need anything here in PY-land, drop me an e-mail and I will try to help, ok?
Many thanks, again. When I finish building the antenna, I will post some pictures here.
CU!
anderson
py1vhf
py1vhf ( ( at ) ) amsat.org

Great post! I use long times to read this forum with many interest, and thanks py1vhf and skywave for give me many useful information of w8jk. I have many interest in w8jk antenna and I still have some question here:

1. As far as I know,w8jk array users often use two feed way, Stub and Open-wire+tuner, skywave talk about a new method by use 9:1 balun, can you tell me which way will get minimum lost?

2. I had to make an attempt at end-feed w8jk antenna before, in fact I build a small model (50Mhz) and made some test, but it's a failure of an experiment. because I don't sure how antenna impedance of end-feed, I know the end of antenna the voltage will very high, but what impedance status of this situation ?

3. In book of (Antenna), I know w8jk and some variation, it can link more elements for get more gain, like organ's construction. (I don't know how to upload image so explain it by text only), I don't know what impedance status of this variation.

4. At last, py1vhf talk about folded dipoles use for w8jk, and you said feed impedance will four, is 5.39*4=21.56 ohms, but I read some difference calculate formula in John D. Kraus' book, he said when two dipoles or three-line dipoles used in array, the impedance will be a quarter of dipoles, I don't know which is right now.

OK, I am so sorry for my disturb, and ask many question at first discussion, and I am sorry for my poor English. I hope you don't mind. anyway,I'm very happy for read this forum about w8jk and thanks very much about your information.

Best 73!
DE BG6IVX