Going to pick up a CTC-12 tomorrow

[DaveWM]

hmmm thats odd, most of my roundies with good tubes are silver looking G1 not so good have a dull tan, ones that got brightners are blued.

[miniman82]

Originally Posted by DaveWM

hmmm thats odd, most of my roundies with good tubes are silver looking G1 not so good have a dull tan, ones that got brightners are blued.

Perhaps the ones that are still shiny didn't have the guns completely bombarded? They turn each element cherry red, to shake the air molecules off of it.

[ctc17]

There maybe something to that G1 color thing. I have noticed it but never paid close attention to .
I wonder if its where the filament evaporation deposits. Much like how a non gas filled light bulb gets that silvery gray coating on the inside from the boiled off tungsten.