W8JITom@aol.com wrote:
>
> Hi Darrell,
> In a message dated 96-10-01 03:15:40 EDT, you write:
>
> > Your comments are refreshing as they are accurate and clearly state the
> case
> >that absolute statements are not always true no matter how many names are
> >quoted. Keep up the inputs. Don't let the doubting Tom's of the world talk
> >you out of it. 73
>
> Before we get carried away with little bits of funny humor let me explain why
> I'm a "doubting Tom". I reseach things before I get caught up in a "new
> frenzy". When the elvated radial thing came out, and everyone else was
> expeimening in the warm house in front of a CRT, I went outside and put up a
> test antenna in a clear area and made FS measurements at one mile as I
> changed the ground system. I went to New Jersey and made the same change and
> made dozens of FS readings at a BC station.
>
> Much of the stuff accepted as fact or published in articles has no technical
> basis, and instead is founded on rumor and folklore. People trying to learn
> don't deserve that type of garbage.
>
> Some is based on models that have not been confirmed by FS measurements and
> gut feelings.
>
> I see no harm in mixing a little reality and a few documented facts in with
> the conjecture, gut feelings, and magic of antennas.
>
> The Brown, Lewis and Epsteins report on ground systems was the most
> comprehensive study ever done in the world to date, and three of RCA's top
> engineers were involved.
>
> With a nearly perfect ground system (more than 60 radials 1/4 wl long) they
> found a ground screen made absolutely no difference at all.
>
> >P.S. Yes, a ground screen can really help. We measured an increase in
> >antenna current which equates to lower ground loss. When it comes to
> >elevated radials the fewer and higher the better but not less than 2.
>
> With poor grounds of less than 15 wires (systems with poor efficiency with
> radials along) they found the ground screen made an improvement. The systems
> became less poor (but not good).
>
> I can understand your disagreement, because your conclusion agrees with L,B,
> and E. With the poor ground like two or more elevated radials, a ground
> screen would help a lot. Ground screens help poor grounds, they just don't
> help good ones.
>
> I'm glad your results agree with the L.B and E study. If you have a poor
> ground, the screen will certainly help. Anything is better than nothing.
>
> 73 Tom
>
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In 26 words or less (save your time and BW), what were your results
concerning elevated wires ?
Thanks, Bob - K2RK
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