Hi all: For those of you using or looking at a EWE, Super Loop, Pennant or other terminated loop antenna, just posted to DXer.ca and the Yahoo UltralightDX group is an article about a controller which precisely varies the resistance over a selected range. In experimenting with a Conti Super Loop, I have found that a single resistance value will not provide acceptable nulls for the entire band (the optimum value can vary by several hundred ohms depending on the target), and that the ability to fine-tune the resistance can make a big difference, since being off by 50-75 ohms might miss the null altogether. This remote termination design allows you to stay in front of the radio while you tweak the resistance for the best null. Thanks to Steve Ratzlaff for the bulk of the design and construction!
Here's the DXer.ca link: http://www.dxer.ca/file-area/cat_view/87-ultra-light-radio-files-area/97-ulr-antennas It is also in Section 5 of the Yahoo UltralightDX group files section. Kevin S Bainbridge Island, WA _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
