Cracked Tube Base

speedtaco

Member
Messages
901
I have a couple of old Raytheon 6V6 tubes with cracks in their plastic bases. Wondering if the crack will compromise the tube in any way. One of the tubes only has flashing right above the crack. Any advice is appreciated!
 

speedtaco

Member
Messages
901
I did test them in my Champ, and they sound fine. I just did not know if the bases were part of the seal as @gulliver mentioned. Strange that one has flashing right above the its crack. Heat maybe?
 

Dan40

Silver Supporting Member
Messages
1,937
Many tubes have the flashing on the side instead of the top. A cracked base won't be an issue as long as the glass envelope is still holding a vacuum. If the flashing turns white, then you know the glass is cracked and the tube is no good.
 




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