[Elecraft] Four Band K1 and antenna

[Charles Greene]

At 03:42 PM 5/27/2002 -0400, Ron Polityka wrote:
>Hi,
>
>  I have been working on my antenna for the K1 over this holiday weekend.
>
>Just wondering what kind of portable antenna anyone uses when they are out
>portable in the field.
>
>I have the bands of 40, 30, 20 & 15 meters. Looking at a doublet type
>antenna, no verticals.
>
>Thanks for any input.
>
>72
>Ron,


The last "outing" I used a 40 meter OCF, but it used two DK whatever 33' 
collapsible fiberglass masts; mine and K1JD's.  The long 45' part was 
between the two masts, and the 22.5' part came down like an inverted 
V.  Then I modelled it in EZNEC and decided I didn't like the 
pattern.  Most of the radiation patterns were of figure 8 type except for 
40, and we didn't use 40.  So pattern wise, I decided to use an extended 
double Zepp on the highest frequency used which probably will be 10 for our 
next outing.  (You would use 15).  It will use one 33' mast and be 
installed inverted V type.  Nice gain on 10, and it gives a broad side 
pattern on all other bands and gain pretty close to a dipole.  Just feed it 
with open wire.  I use some home made from #26 silver plated, stranded, 
teflon insulated with a slight twist or held together close space with a 
1/8" piece of heat shrink tubing every 6".  I calculated it has a series RF 
resistance of about 5 ohms for a 37' length, and an impedance of about 180 
ohms, but that's not the point.  It is low loss and with a balun, the KAT2 
loads it up fine on all bands including 80.  Light and easy to carry 
compared to 300 ohm ladder line and a lot less lossy than RG-174.  Just 
thought I would share this idea.



73, Chas, W1CG