No, it was center fed like an inverted V, so it was fed at the bottom of the pole in his arrangement with one side of the feedline going to the pipe and the other going to the horizontal wire. (Otherwise it wouldn't be a 'doublet').
Yes, the arrangement would introduce some unbalance in the feeders. Ron AC7AC -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Vic K2VCO Sent: Wednesday, December 14, 2005 10:41 AM To: 'Elecraft Discussion List' Subject: Re: [Elecraft] Helix-wound EDP Ron D'Eau Claire wrote: > Some years ago Doug DeMaw, W1FB, published a design that might work for you > in a tight situation. I've considered it here, although the short doublet > has worked well enough that I've not tried it. He bent a doublet at 90%, > like you might for an extreme "inverted V" design, but arranged it so one > radiator was horizontal to the earth, making the other one vertical. He used > guyed aluminum pipe for the vertical radiator and a simple wire for the > horizontal radiator. The system is fed with open wire line and an efficient, > balanced ATU. I seem to remember this being fed at the bottom, making it a one-radial ground plane. But maybe it was center-fed at the top, as your description suggests. Either way, the idea appealed to me, because it would have high and low-angle components, although both the vertical and horizontal patterns would be skewed. One thing that bothered me about this antenna was that there might (I suspect) be a significant current imbalance in the feedline because of the two legs' unbalanced relationship to ground. That would cause radiation loss from the feedline (and noise pickup). But maybe not -- in which case ths would be a very interesting antenna! -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
