[Elecraft] Re: Mobile Antenna for KX1

[wayne burdick]

On Mar 3, 2005, at 9:59 AM, BPCI at aol.com wrote:

> Any suggestions for antennas to use for a KX1 from a vehicle? Any
> experiences folks have would be helpful...72, Ci


Hi Ci,

Operating at 4 watts with a short antenna is a challenge (and "loads" 
o' fun, pun intended). You'll want to use the most efficient antenna 
that will fit on your vehicle. The longer the better. I've had 
excellent results with QRP using an 8' ham-stick on 40-10 meters. This 
is mostly due to the length. The loading coil is distributed over about 
half the antenna's length, too, an improvement over a small coil at the 
base.

With all such antennas you have to switch elements to change bands. A 
long whip with a large motorized coil is the best way to go if you want 
to avoid this hassle. Or, you can put an ATU like our new T1 at the 
base of the whip.

You may also be able to tune the antenna on multiple bands with an 
in-the-rig ATU, such as the KXAT1. Efficiency will probably be worse 
the farther you go from the whip's resonant band.

73,
Wayne
N6KR


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