Recent content by AA6EG
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Feedline impedance matching for the WSM 50 Kilowatt AM station in Nashville TN
I took pictures inside the matching house, and found interesting the stacked, spaced "pizza pan" capacitor plates. When a friend of mine and I got the insider's tour, first of all my friend was a history professor, and all this stuff looked like a Tesla science fiction laboratory of old to...- AA6EG
- Post #19
- Forum: Electrical Engineering
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Feedline impedance matching for the WSM 50 Kilowatt AM station in Nashville TN
Sorry, I mistakenly duplicated some pictures. How can I edit them out? Here is a site with live streaming of WSM... twangy country music. https://wsmonline.com/listen-live/- AA6EG
- Post #16
- Forum: Electrical Engineering
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Feedline impedance matching for the WSM 50 Kilowatt AM station in Nashville TN
I am still seeking information about ground screens, etc; Some more about WSM structure, from a Retired Ch Engineer, Watt Hairston, who succeeded Everett Lawson. Watt Hairston "The top part of the tower was removed in early 40's, part of it was the flagpole at Lipscomb Elementary School across...- AA6EG
- Post #15
- Forum: Electrical Engineering
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Feedline impedance matching for the WSM 50 Kilowatt AM station in Nashville TN
650 khz since 1929 in the case of WSM made it one of less than 10 FCC authorized "Clear Channel" stations in the USA. At one time I think it was the ONLY AM station on 650. As time passed, "Clear Channel" no longer meant exclusive single stations, but few stations in USA. Extensive...- AA6EG
- Post #11
- Forum: Electrical Engineering
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Feedline impedance matching for the WSM 50 Kilowatt AM station in Nashville TN
Also, in recent years, they replaced the very old but operational 5 wire coaxial-parallel wire transmission line with a large coaxial line, buried. When I visited, it was 1989, and the open 5 wire line was in use. There are now some very interesting videos on youtube with drone inspection...- AA6EG
- Post #8
- Forum: Electrical Engineering
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Feedline impedance matching for the WSM 50 Kilowatt AM station in Nashville TN
I think you are right "Baluncore". A 5/8 wave vertical has more effective radiation to the horizon which is the goal, but has some lobes of radiation at high angles, that interacted negatively with the ground wave, and I think, but am not sure, that the 5/8 needs less of a ground system, than...- AA6EG
- Post #7
- Forum: Electrical Engineering
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Feedline impedance matching for the WSM 50 Kilowatt AM station in Nashville TN
No need for help, the Engineering staff at WSM rebuilt the Tuner house, and apparently all is well now. No, but I visited the transmitter site after discovering it just off the freeway, on my way to Huntsville from Indianapolis. I stopped by, un announced and the southern hospitality of the...- AA6EG
- Post #6
- Forum: Electrical Engineering
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Feedline impedance matching for the WSM 50 Kilowatt AM station in Nashville TN
The WSM 50 Kilowatt AM station in Nashville TN, has been transmitting using the same ~950ft 5/8 wave Blaw Knox Diamond antenna, since 1929. The 5/8 wave vertical had some horizon gain over a 1/4 wave vertical so theoretically will serve distant listeners better. It was found though that...- AA6EG
- Thread
- Impedance Impedance matching
- Replies: 20
- Forum: Electrical Engineering