Howdy,
Concerning antennas for Part 15 ops, is anyone here experimenting with fractal, slotted tube, RF network tuned loop inductors, and other wideband/multiband antenna systems?
Wow what an interesting thought, picking out the particular case of "slotted tube" antenna. Applying it to medium wave is a very curious idea that I hope to hear more about.
I was involved with an pioneer FM station built in 1947 with a slotted tube up on the tower at 12,500 watts. The signal remained solid and strong through the 1980's using the same antenna and, never being stereo, was a decent competitor to 100kW stations.
I think the slots were cut at wavelength or fractions of wavelength, so the question in the case of medium wave is that of slot placement within a 10-foot tube.
Can you find pictures of it? Which way was the tube oriented?
Slots at some fractional dimension makes sense to my logic, however meager in understanding radio wave propagation it might be. How about diameter?
Sorry Ken, the station was sold and the top (slotted) mast on the tower was taken down in 1990, and the only picture (that I know of) is of the entire tower from about a half mile away, where the top looks like a straight pole. The chief engineer died ten years ago.
I think it was made by RCA.