[BC] Re: Franklin Networks

[DHultsman5@aol.com]

In a message dated 7/22/05 2:58:01 P.M. Central Daylight Time,  
broadcast-request at radiolists.net writes:


Am I  missing something?  Why couldnt they motorize the network and  
remotely adjust it?




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In the old WOAI Franklin,  since gone away,  I believe Mr, Jeffus  had 
motorized controls on the network at the mid point.  It was written in  the IRE 
Broadcast Proceedings in the laate '50's or early '60's. I also  seem to recall 
that tower had two sample loops one in the top section and one in  the bottom 
section.   I do recall visiting the site when the 50 kW CEC  317B was in the 
same room with the TV4 transmitter.  The AM tower was about  a half mile away 
with open wire between the AM/TV transmitter building to a  small building at the 
base of the AM tower about the size of a single car  garage, with a 3-1/8" 
rigid line up to a concrete platform at the sectionalized  point where a 
building slight larger than an outhouse (chem can for any  yuppies)  terminated the 
transmission line and fed the tower.  I wish  I could find a copy of that IRE 
proceeding.
 
Also I have seen an overheight FM tower with AM that had a detuning  skirt 
with a sample loop in the middle of it with a remote control resonating  
network. To reduce the efficiency of the AM radiation.
 
 
I believe WTMJ,  Milwaukee uses a sectionalized tower in the center of  its 
array.  In day non-directional the tower is taller electrically, when  
direction there used to be and RF contactor on the tower that cut loose the top  
section.
 
Dave Hultsman