Quote:
Originally Posted by Donj
... It is a 1X2B. Since I don't think this tube was even thought of when the set was made, it can not be original.
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Here's an article about new tubes introduced in 1949, including 1X2. That'd be congruent with your set's vintage.
https://www.americanradiohistory.com...-Page-0027.pdf
It's obviously original to the set.