Ted, WA8ULG, tours WLW - April, 2012
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Ted, WA8ULG, writes: I identify that which is not obvious.... |
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5165 -- Should be deleted. It is the match C for the stand by folded monopole which I deleted to avoid confusion, if you are dying to know. 5166 -- The tower shed to the west was not part of the Blaw-Knox tower. It was the feed for the flattop and still used for a back-up folded monopole. The shed was built with the crates of the 50 KW Western Electric 7A which was the first 50-KW in the country (maybe world). It was used as the exciter for the 500Kw. |
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5171 -- This is the front to the WE 7A. It was last used at the Millennium for about an hour. Look elsewhere for when it first went on, maybe about 27-28. 5172 -- The Cath-anode cabinets (Rockwell's baby). PA using the WE to left for IPA ( not the finals). 5174 -- A guy insulator. The BK guys were replaced in 2011, first time since initial construction. 5176 -- Two of the three PA's. The tubes are shown on the catwalk. There were 4 tubes in each PA. |
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5177 -- One of the later Federal PA's. The original RCA tubes were DC filament with perhaps 1100 Amps from Motor Generators in the basement. Later they went to 3 Phase AC filaments with the Federal tooobes. 5178 -- You see a tube in place in the rear (thru glass). The tube's plate seen unmounted in the foreground was immersed in a cooler that went in the area below the catwalk. There the Pyrex piping carried the clean-loop distilled water that was cooled by an exchanger with the dirty-loop water that went to the cooling pond. 5179 -- Front toward right, the last two doors are the modulator. The moose mod xmrf in the basement is right below these cabinets. 5180 -- Good front view. The PA's (3 of them) are at the left and the Mods (2 of them) are in the nearest cabinets. 5181 -- Geoff Mendenhall with the operational Harris 50 KW 5182 -- The original operating position showing a now paltry 15 Amps of RF. |
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5184 -- Walt's Son Steve and an old buzzard 5185 -- This is a kill pickle for one of the PA's. The PA's were driven in parallel, the outputs were is series, and a "sled" in the basement directly below - world's biggest slide switch - permitted a single PA to be isolated or taken off line in case of emergency by taking it out of the series. |
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