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In Reply to: Can someone identify these 12AU7 tubes ? posted by AbeCollins on March 8, 2012 at 16:07:32:
The one on the right must be an RCA cleartop - that's a very RCA style mica spacer (like in their 12BH7 too), the 12AU7 label is in a box (though Tung-Sol also did this), and it looks like a side-getter (though hard to confirm from that pic).
The left tube I cannot nail down since I don't have experience with it, but it looks like a 70's or later vintage; possibly Sylvania.
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Follow Ups
- RE: Can someone identify these 12AU7 tubes ? - mulveling 16:56:15 03/08/12 (0)