On 9/13/17 9:37 PM, Tom Osborne wrote:
If you look back at pictures of the early stations, a lot of them had a
horizontal wire with 4 or 5 wires in a flat-top configuration. Most of them
were between a couple of supports and fed with a single wire. 73
Tom W7WHY
That's a very common configuration - it's basically a capacitively
loaded short vertical.
Back then, they were working at pretty low frequencies - hundreds of
meters wavelength (200m and shorter is a wasteland, so let's let
amateurs use it)
Empirically, they'd find quickly that a top loaded short vertical is a
fairly effective radiator - it's the center of the dipole that carries
the highest current after all.
If you look at pictures of Omega stations (radiating at 11 kHz) that T
antenna is a pretty common configuration (with a gigantic loading coil
at the base to boot). The lowfer folks found that too.
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