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Big Brother
That unit on ebay is the big brother to RCA's TLS86A projector from 1948, which used a 5TP4 operating at just under 30KV. The 5AZP4 came out in early mid- 1950s, and had improved phosphors and could be operated up to 40KV. If I did not already have the TLS86A, I would prebably be chasing after it, as I love projection sets almost as much as early color.
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John Folsom
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