Quote:
Originally Posted by vts1134
I've never read date codes on tubes before. Where would I find them?
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RCA codes of the era where 2 or 3 characters long. The first character was the year such as R-1939, X-1940, Y-1941 followed by the letter E for OEM, followed by the month; 1-Jan-Feb, 2-Mar-April, etc. The XE1 for example is 1940, OEM, Jan-Feb. The KE5 is 1943, OEM, Sep-Oct.