RCA 6SN7’s Question?

Toolfan66
Toolfan66 Posts: 16,834
So I purchased this lot of NOS RCA 6SN7GTB’s
9 of them look a little different, the base is shorter, the diameter is about 1.45, and there is a hair thin wire you can see going across the top.

The other 4 of them have a taller base, diameter is about 1.65, and no hair wire going across the top.

Outside that the build between the two look the same.

Different manufacturers?

I actually like the look of the taller wider base, but not like you will see them.

What do you Tube guru/nerds think?

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