Shaffer
Headphoneus Supremus
- Joined
- Sep 7, 2013
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Those two tubes were pictured on the 6AS7 thread recently. The information given is that one tube said 188-4 and the other 188-5. Would the 4/5 indicate different factories, or is it just a bogus designation on a RCA tube?
IIRC, 5 is a factory is PA (I could be wrong). 4, no idea.