(DISPLAY TUBE) 838 RCA Radiotron around 1940 (DISPLAY TUBE WITH OPEN FILAMENT)
(838=variable-mu variant of 203A)(4-pin bayonet base like 211)
838 is a higher Mu 211
$6.00 $19.99
(DISPLAY TUBE) 838 RCA Radiotron around 1940 (DISPLAY TUBE WITH OPEN FILAMENT)
(838=variable-mu variant of 203A)(4-pin bayonet base like 211)
838 is a higher Mu 211
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