[Elecraft] AM Broadcasting

Bob McGraw K4TAX rmcgraw at blomand.net
Fri Dec 21 17:19:08 EST 2018


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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