Make a frame using two 2x4's and two 1/2" wood dowels or pvc between them. Wrap 300 ohm ladder line around the frame. Make the sides from the 2x4's and the horizontal cross pieces from the dowels/pvc. If it's 2' per side you can get plenty of length wrapped around it. Leave a gap between wraps of whatever the spacing is between the wires. With 300 ohm ladder line you can obviously get more turns. Going from one impedance to another doesn't matter since you're using a tuner anyway. Use of wire ties along the way will keep things in place. I have done this several times and had no problems with unbalanced currents. You can fasten the frame to your outside wall under the roof overhang using L brackets. Keeping it dry helps reduce changes when it rains. 73 Steve N4LQ n...@carolina.rr.com ----- Original Message ----- From: "Clark Macaulay" <clarkmacau...@yahoo.com> To: "ElecraftList" <elecraft@mailman.qth.net> Sent: Thursday, July 16, 2009 1:49 PM Subject: Re: [Elecraft] More on doublet and feedline issues (dw)
> > I noticed the quote by W4RNL "He is the first one to remind me of the (1/8 > wL @ lowest operating Frq) rule for optimizing ladder-line length" and > always wondered what to do if the distance to the shack wall is much less > than that (especially if 80m operation is desired)? Laying on the ground > is not an option nor is rolling it up in a neat bundle. > > What have others done? > > Clark KE4RQ > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
