NOS tubes
I have a Rogue RP-1. The previous owner sent a set of NOS(?) tubes with the stock tubes. The boxes these tubes came in are labeled like this:
JAN 12AU7
AF 30(635)4462
Date Packed FEB 1959
Philco Corp. Phila., Penna
What does all that mean (I think the JAN stands for Joint Army Navy, but what does that mean)
Are these installing and trying?
Thanks Ron G.
Probably US Government
As to tubes in RP1…best sound I had was with Brimar CV4003 from upscale audio Second best with Gold Lions. Didn’t like JAN, RCA Cleartop, Tungsram. Stock JJs are quiet and reliable but don’t sound as good as Brimar or GL.
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I don’t like licorice and avoid all food that contains even a hint of it. |
@audphile1 😆 . I don’t like it either , but I like the song by Grand Funk. Also thanks for the GL opinion, I’ve got to try some. @lewm , I feel you dog, but it’s a 12AU7 thread, kinda like eating liver ? I think the 8 pin tubes have it over the 9 pin tubes all day long. Cheers my Peers , Mike B. |
Buell, I take your point (but not Audphile's point, since I don't know what that is). But the thread begins with the OP asking questions about some writing on a box that was used to package his Philco JAN 12AU7s. It's easy to say he can go ahead and try them in his Rogue. No one seems to disagree with that, least of all me. It's also evident that no one of us has any information to suggest they are special in terms of SQ as compared to any other common 12AU7. And none of us responders knows what the alphanumeric code on the box means. Yes, a 6SN7 (8 pins) which has specs very like those of a 12AU7 (9 pins), will walk all over a 12AU7 in terms of sonic quality. One can buy an adapter to use a 6SN7 where the 12AU7 was called for. But like the FQ7, a 6SN7 also uses twice the filament current of a 12AU7 and by the way can only be used in a unit with a 6V filament supply. If a 12V supply, one can use a 12SN7. So the SN7s are much like FQ7s, except no adapter is needed to use the latter in a 12AU7 socket. Anyway, a 12AU7 used as a driver or buffer stage does not do much damage. |
@buellrider97 yeah GFR kicks ass. I have very fond memories of that preamp. My buddy still owns his and it sounds great. He just re-tubed it with GLs. I get it you don’t like that tube, but
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