Tom, thats true if you have one radial, but making it 1/4 wavelength long
minimizes RF on the rig and, in most situations, only a small part of the RF
flows in it. Its a function of the ratio of the impedances of the "radial"
and the radiator.
Consider the "ideal" case. A radiator close to 1/2
Any wire works with about 1/8 wave the minimum.
Usually BL2 is not needed. For antennas with high SWR BL2 heats and seems to
absorb nearly all the power.
I used my K2/10 in ARRL contest from a park in Galveston Island, TX. About
25ft wire to a palm tree and one radial. 5 continents in 30 min. Th
a
> 90-degree angle between them (so the RF fields won't tend to cancel each
> other) even though one wire might be a lot longer than the other.
>
> Ron AC7AC
>
>
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mail
Ron AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of John Shadle
Sent: Friday, June 17, 2011 7:20 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] [K2] wire antenna lengths for portable operations
I'm head
A good starting point is to make length of radiating wire and length of
counterpoise odd multiples of a quarter wavelength at frequency of interest.
This puts relatively low voltage at feed point with resulting relatively low
impedance and easy matching.
73,
Hank, W6SX
On Fri, Jun 17, 2011 at
I'm headed up to KL7-land next week and am going to take the K2 with
me. I was thinking about using the KAT2 to tune a wire attached to the
BL2 (at the 1:1 setting).
Probably going to cut some teflon-coated wire this evening and pack it
away in the bag.
I'm seeking input on the best lengths of wi
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