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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: National 7316?? posted by tpcarter on November 19, 2016 at 15:42:30:
Hello TPCarter who lives in the beautiful Bay Area.Per your made in USA National 7316. I researched 7316's years ago. They were designed by Amperex as industrialized ECC82's/12AU7's. I believe the only real 7316's were made by Amperex in the Heerlen, Holland plant. Thus it is likely any tube labeled as a 7316 not made in that location is not a real 7316. Of course as 7316's sell for top dollar there is always a possibility that some shyster might re-label an Amperex ECC82 as a 7316 so be aware when you purchase 7316's.
Per the above I doubt Amperex USA ever made a 7316. It is worth examining your National 7316 for signs it was made in the Heerlen plant and not in the USA. If you look down on the tube from the top is there a ridge, like a raised thin straight line that goes from one side of the top thru the raised nipple to the other side of the top? Or possibly 2 such raised lines with one crossing the other at a 90 degree angle such that they divide the top of the tube into quarters?
If you examine the tube's glass envelope, near the bottom edge, are there any Philips ID codes? If so what are the codes? Such codes usually ID the specific tube type and version and when and where it was made. These details, among other things, can distinguish an Amperex ECC82 falsely labeled as a 7316 from a real Amperex 7316.
Note: During the production run of 7316's Amperex made 5 or 6 variations of the tube. Although all are supposed to be superb sonically they have different characteristics.
I used to live in SF and Marin. The Bay Area is fab!
Hope this helps.
Edits: 11/21/16 11/22/16 11/22/16
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Follow Ups
- RE: National 7316?? - JazzDude 18:36:17 11/20/16 (0)
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