Active Auto Switching Vertical Antenna PDF.zip I propose this idea for those who like to home brew accessories for their SDR hardware.
This antenna may be used without a pre~amp but works well with one as an active antenna able to auto switch its wavelength and is somewhat immune to noise. A tuner is required to make the best use of the antenna whether used as an active or passive antenna system. Using a direct equivalent to a close ended loop antenna, via capacitance hats at the base and top to couple noise energy to the ground and form a loop, this shilds itself from noise Yet, it is a vertical HF field probe type antenna of one meter length. Note: it can not shield all noise as a loop antenna is able to but should be a good alternative antenna idea. I have been developing this for HF DX use here and have made a few rf ohmic measurments to aid you in making use of this and making improvements with time. It does not have to be perfectly matched to work well. I give this idea then to CIAO Radio, i2phd and amateur radio operators, as well as shortwavers to use as a homebrew experimental antenna. I like Claudio Re's vlf antenna probe he made as well as his loop he demonstrated with the H101. Dan ka9rza Free Internet <http://gateway.pbwiki.com/f/Free_Internet.zip> _____________________________________________________________________ FREE Reminder Service - NEW from AmericanGreetings.com Click HERE and never forget a Birthday or Anniversary again! http://track.netzero.net/s/lc?s=197335&u=http://www.americangreetings.com/products/online_calendar.pd [Non-text portions of this message have been removed]
