Ha, ha! Check the date on the article. VK5BR has a parallel tuned circuit (two plates for the capacitor and coil for the inductance) with the "feed" tapped across a couple of turns of the coil.
One could use any parallel coil/capacitor combination with adequate voltage and current ratings to do that. It's all fed with RF from the unbalanced open wire line, which certainly does radiate a bit. The coil/cap combination will add a tiny bit of radiation too. It reminds me the famous "light bulb" antenna by, if I recall correctly, Larson E. Rapp, aka Byron Goodman, W1DX (SK) in which a feed line was connected to an incandescent bulb atop a fence post in a much earlier April issue of a well-known Amateur radio journal. VK5BR's antenna might radiate a bit more, due to none of the energy being converted to photons at visible light frequencies, but Rapp's version offered a clear visual indication that the antenna was getting RF power. Rewriting Maxwell's laws is a long-standing, honored tradition in many electronics journals every April, Amateur and Professional. Ron AC7AC -----Original Message----- Ooops. I must apologise for my mistake: I've read the article in more detail and Lloyd is not feeding a small antenna, he is using the "feeder" as the antenna by deliberately unbalancing it with a terminal unit to obtain maximum current at the far end of the feeder. Presumably this would then be elevated to a convenient point for maximum effect. David G3UNA > Here is an interesting antenna made by Lloyd Butler VK5BR. It uses > open > wire feeder to a VERY small antenna. > > http://users.tpg.com.au/users/ldbutler/ReverseFeedTopLoading.htm > > David > G3UNA > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
