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You are right, but the improvement in efficiency is about .01 dB better. That hardly makes it worth it to gain the .1 of 1 dB. If you shorten the trunk, the amount of loading needed increases which then gives you the same bandwidth limitations the other design has. Also the lengths are very critical as the "N" element cannot let its presence be known to another F12 tribander. This non-interaction issue actually drove the design. 73 Natan W6XR/2 FORCE 12 East Ithaca, NY ----- Original Message ----- From: Pete Smith <n4zr@contesting.com> To: <force12talk@qth.com> Sent: Friday, February 25, 2000 2:58 PM Subject: Re: [Force 12 Talk] C4XLN ?? > At 12:33 PM 2/25/00 -0500, Natan Huffman wrote: > >Charlie, > > > >We are now doing the design of what will probably be the C41XR, which is a > >C36XR but one using the "N" elements for 40. The mechanical design is very > >difficult because our mast torque criteria has been exceeded in all the > >first attempts. We continue to work on it. > > > >Will keep the reflector posted. > > > >We can't just substitute the "N" element on a C4XL because the boom must be > >redesigned and the torque issues once again become a problem. > > I'd understood second-hand that in addition to being bigger, the N element > is more efficient because the folded section is outward from the break in > the element, rather than inward, resulting in better current distribution > and more nearly-full-size perfornace. Any prospect that this concept could > be adopted for a shorter element? Or do I have it all messed up....? > > 73, Pete Smith N4ZR > n4zr@contesting.com > > Don't forget to update your entry on the World Contest Station Database, at > http://206.102.70.3/search.htm > > -------------------------------------------- > Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. > Force 12 Web site: http://www.qth.com/force12 > Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk > > To unsubscribe, send a blank e-mail to force12talk-leave@qth.com > For problems with the list, contact force12@qth.com > > -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk To unsubscribe, send a blank e-mail to force12talk-leave@qth.com For problems with the list, contact force12@qth.com |