http://www.w5dxp.com/notuner.htm

Cecil,

Looking more at your antenna, I am making several observations. I
posted the URL at the top for other readers to know what we are
talking about.

I kind of wish you would change the name of the antenna and not call
it 'no-tuner' because I feel let down every time I look at it and see
the feed-line tuner. I realize it isn't a conventional tuner. Don't
get me wrong, I think it is a GREAT idea and I like it very much and
would like to try it myself. However, I feel it is a little deceptive
in the name.

I have a few questions about the system. I may have asked some
already in another thread, so please bear with me. This is a better
place to discuss it rather than hijacking another thread.

I see you use 450 ohm ladder line (or window-line as some call it.) I
am wondering if the concept will also work with other impedance
feedline such as 600, 300 or 75 ohm twin-line or even possibly with
coax. ****


**** I just looked over your program. I see that you have it setup to
allow 300 or 450 ohm ladder line. I wonder if you have LLWL available
for 600 and 75 ohm.... I will try to put this in XL. (I don't have a
basic program.) OK, I just found the compiled program.

I am interested in making one, but I only have 300 ohm.

Does the feedline act as part of the antenna? I am sure it will, at
least up to the 'no-tuner' if it acts like a G5RV, but do you know if
the feedline radiates?

Have you measured the power at both sides of the 'no-tuner' to see
what loss there might be? I doubt there would be much considering
that you are using window-line.

I see a couple of the frequencies are above 1.5:1, which I am not
comfortable going over with solid state rigs. Do you think that could
be fine-tuned with the addition of a 1/2 foot section or maybe with
that and a 1/4 foot section?

Would it be safe to assume that I can create a mono-band dipole, maybe
even multi-band - if I am lucky, by fixing the length of the dipole
and the feedline such that the increment gives me the imax at the
balun for the desired frequency(s)?

Finally, you have a 1:1 choke at the feeder. I see that the better
quality coax, the more toroids are needed. Would there be a problem
with using a foot of RG-58 with the fewer toroids and then connect
that to the high-quality line? I suspect that by then the common-mode
currents will be gone and there would be minimum loss in such a short
strand of lower-grade coax for HF. I doubt there would be a
noticeable signal loss.

Does the 'no-tuner' feedline need to be spread out. I see from the
photo that your 16 foot section is one large loop, I figure it must be
close to a four-foot diameter loop.

Is there a similar system that would work with a vertical?

Thank you,

I appreciate your taking time to answer this. I hope many of us can
learn from it.

Buck
N4PGW








--
73 for now
Buck, N4PGW
www.lumpuckeroo.com