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Flashing Telefunken 12AU7/ECC82

I was poking through my Tele 12AU7/ECC82s and came across one that looked just a wee bit different than the others. It's a ribbed plate version. Plates, glass bottle, getter ring, base with square/diamond all appears to be exactly the same as every other Tele 12AU7 I've got. The one small difference is the absence of a "clip" of some sort on the top mica. All the other Tele 12AU7s I've got have this except this one.

So I pair it up with another Tele 12AU7 and plug the pair into my CJ PV-12A preamp. Well, darned if this slightly anomalous tube flashes on turning the preamp on like a Philips manufactured tube. I've never seen any other Tele 12AU7/ECC802Ss do this.

Anyone with any thoughts about what's going on? Telefunken production I've always found a difficult to get a firm understanding of, unlike the Philips family of tubes which, at least for me, I find easier to fathom and chronicle.

- SJ


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Topic - Flashing Telefunken 12AU7/ECC82 - tvr2500m 10:21:58 09/19/04 (2)


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