the woodpecker's roost
metavox at earthlink.net
Mon Aug 27 10:47:11 CDT 2007
This is a very interesting set of pictures. Thanks for the posting.
It looks to be a set of highly directional HF antennas. A similar type
antenna was used by VOA except this one looks to be more robust
structurally, perhaps to withstand the ice loading. The VOA design used
two towers, one on each end and a complex bunch of wires to make up an
array of phased dipoles. The design is shown in Jasik's first version
of the antenna handbook. One of them was at the Bethany Ohio VOA site
just north of Cincinnati and was demolished several years ago to make
way for a golf course.
The woodpecker signal sounded like a simple pulse radar. To work, it
would need the gain of an antennas like these. I suspect the smaller
was for transmit and the larger for receive.
The US used more sophisticated signal designs that did not create so
much interference and did not need so much gain. However, the US system
required computer signal processing that the Soviets may not have had
available. Or perhaps they had the computers but did not choose to go
that direction. After all, Soviet hams would just be told to not
complain for the good of the state.
If those antennas still exist, they might be good for some QRP record
setting. With good propagation, a few microwatts should make a
transatlantic path using QRSS with these monsters.
Mike O'Dell wrote:
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