Hi Michael,
Thanks for listening and checking out the Active Elements site. The antenna
comparisons are just a bit of fun really, but intend to show you don't
necessarily need to spend a lot, or have radials if your ground is good.
My friend uses his identical trapped inverted L on 40m and it is a really
excellent DX antenna. I often feel really pleased to work 40m DX on my
Steppir, and he then works them as easily with his L. We hook up on Skype,
and I can confirm he hears what I hear.
In my experience you get the best price to performance to effort to least
interference, by using a resonant dipole. Either horizontally, vertically,
or as a sloper.
Vertical quarter waves work well providing you have a good ground, either
you're right by the sea, or you have lots of ground or elevated radials. I
should say my ground conditions were good here for the inverted L
comparison, with a damp thick soil.
The problem as I see it is that we all want to work multiple bands.
Although some antennas will show 1 to 1 SWR everywhere, I have not been
impressed with their low or high band performance.
In general, dipoles and the like are big in the air, and verticals with
their radials are big on the ground.
If you can get radials down, go for a quarter-wave vertical, or a vertical
tuned at the base. If you have supports, and can't get down radials go for
a dipole cut to the band you want the most. If you have neither ground
space or supports, look at the asymmetric verticals such as those supplied
by Cushcraft. A true 80m quarter-wave is 20m high, so the little 6 metre
high verticals that give low SWR are bound to be a compromise on 80, and I
don't see the point in paying for it <wink>.
BTW, I'm talking about DX here. For local stuff, say within 500 miles on 40
and 80, a wire dipole will generally wipe the floor with a vertical. Over
this kind of distance, virtually all of the signal is being refracted
straight down from above.
Best wishes, Kelvin Marsh - M0AID
Working to improve accessibility for radio amateurs with disabilities
www.active-elements.org
For accessibility evaluations of amateur equipment and MP3 manuals
-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Michael Ryan
Sent: 29 January 2013 01:52
To: [log in to unmask]
Subject: Fwd: Inverted L MP3 test
Sent from my iPhone
Begin forwarded message:
> From: Michael Ryan <[log in to unmask]>
> Date: 28 January, 2013 10:13:12 PM NST
> To: Michael Ryan <[log in to unmask]>
> Subject: Inverted L MP3 test
>
> Hi Kelvin:
>
> That L sounded vary impressive.
> I'm in the process of planning and hoping to construct a cabin this spring
where I hope to setup my FT-102 as either a weekender station, or maybe sell
it and set up a remote station and I'm considering as my antenna the Hustler
5BTV.
> So how about this put down say 22 radials at around 18/20 feet long
attaching them to your vertical and then test that one against the L?
> I'm thinking though, with how that L sounded, I might save my self 300
canadian dollars and spend 300 into the L instead of 600 into the DX
Engineering Hustler package.
> See if you got time for a shoot out like that, I'd be vary interested in
the results.
> Also, vary good work with the testing and evaluations, I took the liberty
of reading down through a few..
>
> 73:
>
> Michael DE VO1AX
> P S
> Maybe you could also look at the Icom 7410 and the RS-BA1 software?
>
>
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