[K3PZN-List] new ham antenna questions

[Curt Milton]

Yeah Jim, I know!  Got some ladder line exiting the window - for now (after some construction here) its my only antenna.  Not an end fed zep but an off-center fed dipole.  Its fine on CW - but it could use a unun and common mode choke for phone!  


Actually Ray's version is kind of a sideways Zepp -- but problem is this kind of antenna works best when feed is orthogonal to the radiator - not possible here!  If Ray would float his matching network, he could do an end fed half wave (if he floats high enough to deploy that much wire).  


CUL Curt


________________________________
 From: "wa3mej at comcast.net" <wa3mej at comcast.net>
To: Curt Milton <wb8yyy at yahoo.com>; Carroll County Amateur Radio Club <k3pzn-list at mailman.qth.net> 
Sent: Monday, May 21, 2012 1:19 PM
Subject: Re: [K3PZN-List] new ham antenna questions
 

Curt,
  More than that... end fed (ZEP) antennas are unballanced antennas and some care must be taken to get rid of the common mode problems that they pose. .. ie. a good ground screen coupled with an UNUN..  
 
Jim


________________________________
 
From: "Curt Milton" <wb8yyy at yahoo.com>
To: "Carroll County Amateur Radio Club" <k3pzn-list at mailman.qth.net>
Sent: Sunday, May 20, 2012 7:58:44 PM
Subject: Re: [K3PZN-List] new ham antenna questions

Ray

the funny thing is that an end-fed Zep is actually named this because it was used on a large balloon!  


see for example:  http://www.w4ymi.com/andy_w4uld/END%20FED%20ZEPP/EFzeppnew.htm

also if you do some google research you will find info on antennas deployed by balloon.  also, do required research related to being a hazard to aircraft as to what may be required.  Folk are most motivated to do this sort of thing for 80 or 160 m.  


end fed antennas are less popular because they require more complex matching than many other antennas.

one other note - many folk who operate portable use an end-fed half wave antenna, with the objective of eliminating the feedline completely.  I can provide references (or google yourself - one ham in 5-land has a very nice technical website on this that literally illustrates tuning it).  


CUL Curt



________________________________
 From: Ray Wright <razor42 at hughes.net>
To: Carroll County Amateur Radio Club <k3pzn-list at mailman.qth.net> 
Sent: Sunday, May 20, 2012 6:58 PM
Subject: [K3PZN-List] new ham antenna questions
 
Hello Everyone

ok here is my question can you mount an end feed zep antenna vertically?  Ok 
wild idea from the new ham I was thinking of mounting and endfeed zep to a 
helium balloon and sending it up about 150 feet?  Your thoughts my fellow 
hams?  I think I can get my hands on a 20ft reusable helium balloon.


Ray KB3VK 

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