tubes age 20
Let's see what I have handy, here's a pair of Mullard EL-34's, in Mullard marked
boxes, with the tubes marked as Mullard and "Made in England" that I bought
from AES about ten years ago for a modulator. In actuality, they're not Mullards
at all. They're dimple topped East German tubes. They're a lot better than the
Chinese made fake Mullards on the market today though.
Here's a Raytheon 6LGGC marked as made in Belgium. In actuality it's a
Russian Sovtek. I've got a quad of fake labeled 6L6GC's in the HP-712B power
supply right now. They're Russian, too. And, they won't handle the load of real
RCA's but they're decent enough if I limit the max voltage out put of the PS to
under about 425 volts. A quad of real RCA's will grind away at 500 volts and 200
ma output with no internal arcing or the plates glowing for weeks on end. I've
seen Mullard marked 5814's almost twenty five years ago. They were really
Italian Fivre brand 12AU7's. You don't see many Italian tubes. :-) Oh, plus
Mullard never even made 5814's. <grin>
I won't even go into the 6DJ8/6922/7308 fakes or the 6106 (HD version of the
5Y3WGT) that are floating around that are Chinese.
Westinghouse was another brand that was commonly faked. Beautiful job on
one batch I saw. The boxes were either NOS or some really high quality fakes.
The tubes were Chinese.
Then there were the Servicemaster 12AT7's that weren't really 12AT7's but
unknown origin 12AV7's with the original number ground off of the glass and
relabeled. Oops, let's not forget the 6DJ8 that were actually 6ES8's. No, they
didn't work in the Tek scope very well. I've seen a 6V6GT that had a ground area
on the glass. No idea of what that tube actually was. I make it a point to steer
clear of International Servicemaster tubes. Chief Brand was another one.
I used to see a lot of the old Radio Shack tubes that had ground off numbers
too. Let's not forget the Chinese made Telefunken 12AX7's. It's so easy to
identify a real Telefunken that it'd take a real dumbass to attempt to fake them.
Lots of fakes out of Eastern Europe too.
> 5814 is a mil number ..............Actually, 5814 is an industrial number. I've had
examples of faked 5814's that are actually 12AU7's. How can you tell, you ask?
The filament current for one and the internal construction for the other. They
were labeled as Amperex and made in Holland.
>so who ever made 'em its gotta be a good tube. Its the tube that works not ye
olde boxe.
Typically, the quality control specs for JAN tubes were well above those for
normal tubes.
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