Hey guys, I'm a rookie when it comes to old tubes and really amps in general. I can hear what I like but, all the wiring and components and physics of it all stumps me. Anyways, I have some tubes that I got tossed into a trade a while back and they're supposed to be NOS 12a_7s If I posted pics here are there any members who could help me identify them? Or if anyone would prefer I could PM pics. Just wondering if there are any knowledgeable tube guys hanging around. Thanks.