[Elecraft] antennas for Susan

[WILLIS COOKE]

Not to pick nits, but to clear up a point Eric.  While radials are not required 
for a center fed vertical the salt water surrounding the antenna is still 
important and the vertical will work much better on a beach than in the desert.  
The intermediate field conductivity is very important to the take off angle of 
any vertical, but the only thing you can do about it is to move.  The US Navy is 
fond of the center fed vertical for ship board use, even when they have a great 
built in ground plane.  The Force 12 is an antenna that I have not looked at 
carefully.  I will have to do that.
 Willis 'Cookie' Cooke 
K5EWJ 




________________________________
From: eric manning <eric.manning at engr.uvic.ca>
To: elecraft at mailman.qth.net
Sent: Mon, August 2, 2010 12:23:17 AM
Subject: [Elecraft] antennas for Susan

Susan Said:

the antenna farm will most likely be vertical and located right at the shore 
line.

What suggestions do you have for me to construct for antennas?

________

I had very good luck with a Force 12 Sigma 5, a CENTRE-FED inductively loaded
short half-wave vertical [i.e.,  a short centre-fed dipole tipped up on one end 
]
on  the Bay of Bengal shoreline. 

It being a centre-fed half-wave, not an end-fed quarter-wave, I didn't have to 
worry about 

an efficient ground-plane,so no lossy radials,  and on the shoreline of salt 
water it really got out.
Very good reports with a K2 at 10w. It also fits into a gym bag.

I think a Caribbean DXpedition also used similar antennas and K2s near salt 
water.

eric
VA7DZ



-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html