Quote:
Originally Posted by dieseljeep
Tubes stamped FOMOCO, should have a letter stamped next to the logo, stating who made the radio. 
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Interesting. There is a letter B to the left. Codes on the tube appear as follows on a 6X4...
322-1
5-18
B
This morning I came across a 6GH8A by Mitsubishi. Was the 6GH8A ever used in items other than TV sets? This one MUST have come out of a television.... it was pretty weak.
I often see Delco tubes... I even have a late-30's Delco radio. Sams shows that Delco had about 4 television chassis back around 1949/1950. In the past week, I've found a few Delco 6AU6's.