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Found this small advertisement for the Trol in 1956 radio electronics. Go to page 130 lower right hand side. Couldn't find any info on the Columbia Products INC. company.
https://www.americanradiohistory.com/Arc...956-11.pdf
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RE: Gozinta - by KCMike - 02-16-2019, 12:44 PM
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Tim,
nice write up and thanks for sharing !!
Sincerely Richardradiorich — 02:47 AM |
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I think they have only shown the secondaries of the transformer.
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