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Early KDKA Antenna Designs

S

Schroedingers Cat

This link describes an early KDKA antenna design where the radiation above horizontal exceeded the horizontal radiation. It sounds like some type of Franklin antenna, though it apparently had multiple vertical structures. They also had a 5/8 wave at one point, which was described as an anti fade antenna, but whose signal fading caused people to begin calling it Fadey KA. I suspect that the conductivity is such that the groundwave is bad in some directions, causing critical hours and night skywave to have cancellation zones and fading in desired areas. So instead of being a solid groundwave in the vertical radiation characteristic null annulus, it is weak, and you hear mainly the skywave fading.

This may explain why so many people here describe it as a difficult to receive blowtorch. It also demonstrates the cancellation zone.

http://antiqueradios.com/features/kdka3.shtml
 
In my area near Chicago KDDA was a regular every night of the week. Now it is rare to hear them because they are literally buried alive under IBOC hiss from WBZ. Such a crime!
 
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