OK, I wanted to build a plug-n-play off-center-fed
doublet for Field Day to match my K1 (40-30-20-17) /
KAT1 / solar powered portable station. This aerial
would be much like the old Fritzel, with some
customization for my purposes.
I reasoned I could fiddle with the offset (and maybe
one dangling stub) to get the resonances I want, and
so agrees EZNEC, but when I do, all of the feedpoint
impedances look like they are around 260 to 350 ohms.
So I need a 6:1 balun to coaxially feed this antenna
(coax feed is necessary, long story).
Then, I went to the shop downstairs to draw it out and
wind one up ... no biggie, right? ... and I realized I
can easily wind up a 4:1 right off the top of my head,
but, how do I make a 6:1? I guess I need two
back-to-back, or a funky duo-toroid, or something. ??
Well, I "can" obviously figure this out myself, but
that would be reinventing the wheel. Did a bit of
Googling, with no obvious results. I don't have Jerry
Sevick's book here, alas.
What say ye, fellow Elecrafters? Should I just use a
4:1 and eat the inefficiency? (At battery QRP, I
don't like that option and besides, the purist in me
revolts against such technoblasphemy.) Or could I
actually make a "custom" balun here, and kit my
solar-powered K1 with a snazzy, efficient and
"matching" antenna?
__________________________________
Discover Yahoo!
Use Yahoo! to plan a weekend, have fun online and more. Check it out!
http://discover.yahoo.com/_______________________________________________
Elecraft mailing list
Post to:
[hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help:
http://mailman.qth.net/subscribers.htmElecraft web page:
http://www.elecraft.com
Locked
