I worked in TV where we had one tower, and one antenna, and just
downtilt to worry about...
73s and thanks,
Dave (NK7Z/NNR0DC)
https://www.nk7z.net
Award Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
On 12/21/18 2:19 PM, Bob McGraw K4TAX wrote:
WOW! 12 towers. I've only worked with a 3 tower directional array
that was switched between 2 frequencies and 4 different patterns. A
small 100 KW shortwave transmitter and it too switched between the 2
frequencies. Flip the switch and hope that the TX quenched as it
should, all switched as they should and came back up at 100 KW. A bit
u-nerving when all of this happened. I do recall once there was a
flash over in a tower switching unit which set the sagebrush on fire.
Made for an exciting afternoon.
73
Bob, K4TAX
On 12/21/2018 10:26 AM, Raymond wrote:
The Phasor used by directional stations is not a matching unit. It is
a power divider phasing unit as each tower gets different current,
phase to develop the pattern. Each individual tower has an ATU. The
phasor for a 12 tower station is fascinating as is the pattern.
Ray
W8LYJ
Sent from my iPhone
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