On Nov 16, 2007 2:03 PM, Dave Van Wallaghen <[EMAIL PROTECTED]> wrote: > > > > Nothing bad happens if you leave the balun out, Peter! > > > > Sometimes we over-complicate things. A balun is a good example. All that's > > needed to produce a balanced "feed" is a length of transmission line (1/4 > > wave or so) and a balanced load. If you have those things, it doesn't > > matter > > whether the output from the rig is "single ended" or "balanced", the > > currents at the balanced load, such as the center of a dipole, will be > > balanced. > > > > I played around with this idea this past summer and fall (at Ron and Don's > suggestion) of using an open feeder fed directly to my KAT2. I put up a 66' > doublet about 30' high in some trees in my front yard. I fed it with 33' of > open line I put together with wooden dowels as spacers. As you might > imagine, it tuned up just fine on 40m. In fact, I could tune up fine 80m - > 10m with some problems on 20m and 17m. I then made some open feeder stubs > for those bands that would bring me to some 1/4 wavelength interval and then > I could get them to work FB. ------------------- Dave What I would like to know is what spacing was used on your open line feeders 0.5"(300 ohm), 0.75" (450 ohm) or 1.0" (600 ohm)? Did you use a BNC to dual banana plug connectted directly to the KAT2 on the back of the K2 or was there a short piece of coax to connect from the KAT2 to the feeders or BNC to a split banana plug. --------------------
> So thanks, Ron, Don and others on this list. It was a fun (although not very > scientific) experiment which I plan to do again when the weather warms back > up in the spring. I'm also playing around with the idea of bringing an open > wire feeder into my shack as well. I may play around with a balanced tuner > design as well. ------------------------ The design for this I like to see also. RC kc5wa ------------------------- > 73, > Dave W8FGU > > > _______________________________________________ > 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
