Tube 🆔 help….

JackBootedThug

JackBootedThug

MURDERATOR
What are the two on the bottom left? BBP 6 on the label…
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Whenever you see that plastic looking 'tab' or 'button' inside the glass envelope of a power tube, that's a tell for a Chinese tube. The EL34s have that same feature; and are sometimes labelled EL34M if they are a GT tube
 
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