The original transmitter, according to this engineer, was the 1945-1946 unit originally used by WWDT (WWJ-TV) in Detroit. He said they were told by engineering at WJIM that the transmitter upgrade later in the year would give better reception on the sets they were working on at Sparton. This proved to be the case, but alas, the receiver never actually worked properly. The chroma sync circuit didn't work well at all. On the rare instances that it worked, it looked OK, not really any better or worse than the RCA set.
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