At 09:02 AM 8/20/98 EDT, CQK8DO@aol.com wrote:
>
>Hi Pete...
>I have watched with amusement as Tom pushes his designs that claim that every
>interlaced element is adding to the forward gain, whether that element is
>resonant in that band or not... He is certainly an advertising genius...
>Further, his claimed gains in dB(t) {dB per Tom} are nothing if not
amazing),
>even if they do stretch some laws of physics as well as the published
research
>of Drs. Yagi and Uda....
Denny, I think this is a bum rap. Both my model of my C-3 and the one that
Tom uses produce gain figures at or above what he claims in his literature.
I agree that the non-resonant elements do very little, and note that claim
is no longer being actively promoted as it was before.
>I will point out that gain is dependent upon boom length, not element
count (
>I want you to repeat that ten times every night at bedtime)... Whereas, FB
>ratio and side rejection are amenable to some manipulation by adding elements
>and adjusting their reactance properly...
Of course, as is the distribution of performance across the band.
>
>Now, having said that - Am I saying that Force 12 antennas are bad antennas?
>... No... They are, in fact, good antennas that will give many hams lots of
>pleasure... His use of open sleeve driven elements is excellent... His use of
>rivets is outstanding... His methods of manufacturing and ensuring that
>elements can only go together in the proper sequence is super... His multi
>band antennas give a lot of bang for the buck... But, to make the statement
>that one, or more, multi band Force 12 antennas are the contest equal of a
>similar number of properly designed monobanders is reckless enthusiasm...
You misread my comment, Denny. I wasn't suggesting that you can get
something for nothing. Instead, I was questioning the idea that a TH-7 or
even a KT34XA could approximate a monobander, and at the same time pointing
out that the C31XR is a step beyond them, and begins to approximate *some*
monobanders in performance. After all, it has a 31-foot boom, and uses it
pretty cleverly. Is it the equivalent of a 31-foot boom monobander? Of
course not. Does it probably outperform some 2,3 and 4-element monobanders
on shorter booms-- I suspect yes.
73, Pete Smith N4ZR
In wild, wonderful, fairly rare WEST Virginia
NSI# 1,000,048 NQRPI# 1,000,004
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