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Age of early CRTs

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09-01-2010, 01:26 PM

yagosaga

VK Member

Join Date: Jan 2005

Location: in Braunschweig

Posts: 690

Age of early CRTs

Hi,

I am looking for the production year of early CRTs. I know that the 5AP4 and the 5BP4 were produced already as early as 1939. But when were the following CRTs produced?

5FP4
7BP4
7DP4

Kind regards,
Eckhard

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