On 7/13/2013 12:25 AM, Rick - DJ0IP / NJ0IP wrote:
I said your feedline is contributing to the matching of your antenna on the
10m band and that you have excessive losses in your balun on that band.
I don't believe it... or I don't care.
You pick.
;-)
You need to study up on TLT (transmission line transformers).
No, I need to spend more time on the
air !! The ARRL Handbook, The ARRL
Antenna Book, my RadCom HF Antennas
book, my book by Bill Orr, and so many
articles in QST it ain't funny, say it
works.
Heck, until this week, even you said
it would work !
On ten meters, the feedline is reversing from current node to voltage node
every 6 ft.
OK. Sorry. Cannot help it. You did
not mention this last year when I built it.
(OF course you never even asked if I ACTUALLY
USE IT ON 10 METERS... WHICH I DO NOT...
because I pretty much wanted it for 40m and
20m, and as an occasional backup antenna on
15m (considering my 40m ground plane and
separate 15m aluminum rotatable dipole work
15 meters, without any issues, also...) it
is the third antenna choice here, anyway,
so what if it sucks?
So, let's just say it is irrelevant if it
blows up on 10m.
You are measuring your impedance with a short coax stub but
even a couple of ft. of coax can distort your readings significantly. If
you want to know what it really is, you should do as I asked you to do
earlier, attach an electrical half wavelength of coax to it and measure
again.
OK... sorry. My bad. ;-(
I measured the antenna very close to
the feed point with a very short jumper,
then again at the point where it meets the
remote coax switch, and again where it
meets the rig in the shack. Same results
every time. So, I figure... close enough
for Government work, and should just get on
the air. Too much talk about antennas, and
not enough action. ;-)
I am going to live recklessly, and take
a humungous risk using it... and call it
good enough. I love to live dangerously.
;-)
You should either show us a model of your antenna showing that it works, or
measure it properly, then I'll agree that the antenna is working
efficiently.
Phooey. I don't need anyone's agreement.
Heck, you said I should eschew modeling,
and just build it and see how it works.
It works.
NOW, you tell me it sucks!
Franky, I don't care if it is efficient on
10 meters, or any other band, for that
matter, because it is what it is. Loads of
guys have a good time using OCF dipoles, and
so will I.
Frankly, after this big row over OCF designs,
I am starting to think one can over-analyze
these things and maybe this time, I am
better off just building and using it. After
all, a great many hams use this type of
antenna with success and as it says on your
web site, a good antenna is what meets one's
expectations regardless of what the scientists
say. (that is a great quote on your site...)
A little knowledge is a dangerous thing.
No knowledge is peace of mind.
What I don't know won't hurt me.
So... while I truly appreciate you trying
to save me from myself, I elect to follow
Stuart's advice, and just roll with it as
it does not cause any known problems. You
know, no harm, no foul. ;-)
Thus, I will just use my dopey old antenna
in blissful ignorance.
Later, of course, I will read the stuff JB and the
other guys have recommended - but after I return
from taking my young bride camping a few days... ;-)
Thanks... this is a great outfit and I appreciate
all I learn here. Hope y'all take this in good
humor.
QRT. Gone Fishing.
-------------- K8JHR ---------------------
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