Thread: 1950 Admiral 16" Set; Recapped... No Picture!!
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  #55  
Old 04-29-2020, 09:22 AM
old_coot88 old_coot88 is offline
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The 1B3 filament glows a soft orange when in operation. In a darkened room, you should be able to see it glowing if you look up from underneath the tube. No glow = no go.
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