Savage said:Detroit's WJBK/WDEE at 1500 kHz was also 12 towers DA-N for a time, but IIRC the night system was never licensed due to ongoing mutual negotiations with WTOP and KSTP. The station operated on STAs for years, and finally settled with a 9-tower system for DA-N which now operates as WLQV.
In it's early life, WJBK-1500 was 10,000 and 1,000 from the Lincoln Park site with 9 towers. George Storer, facing competition from WCAR, WJR, and CKLW waiving the flag of 50,000, demanded that his engineers come up with 50kw come hell or high water. He got it, but it was a very tight pattern with 50k day, 5k night. It operated like this through the WDEE "Big D" and then into the WLQV days.
When K-mart approached the station for land, the owner saw dollar signs and the three east towers were taken down. There is still dispute if the FCC was advised of this change or not, but they had an STA for 9 towers with 50k day, 5k night.
When I worked there they had an RCA Ampliphase, Harris MW-5, and the backup was a Gates BC-1T. Three stories about that 12 tower array....
The array could never be proofed in to stay for more than 24 hours. It would drift badly. Part of the array was 24 or more "detuning" skirts on power poles and small towers in the area, (which we had to inspect every other week).
The array was so unstable that when they built the waste treatment plant on the west side of the array, adjacent to I75, the crane they used to move materials would cause the array to float. A tower with a reading of -5/.848 would swing +/- 10 degrees and the ratio would be +/- .200. Also, the workers on the waste treatment plant were constantly complaining about getting nailed by RF.
Finally on my way into town from my home in Westland MI, I would come down I-94 and see the towers in the morning, flashing in the distance. However, on the radio I had good copy of WTOP from Washington DC. The array WAS that tight.
And now you know, the rest of the story ..... and why I got into TV.