On 12-10-04 04:31 AM, Nick wrote:

...or you could just use Frank's pages, which are wonderful, and free!

I often use those also. The Data from the TCA is actually a scan of the entire registration file from the RMA, RTMA, EIA, JEDEC and a few other names that the used over the years. each file Generally has the Official Data sheet, and sometime back and forth between the various makers as they wanted to change the specs to conform to what they actually produced. It also included the same information of the 1nxxx and 2Nxxx semiconductors.

The TCA folks did a nice index which lets you see when the "release" went out as a mailing to the rest of the industry. This is sometimes not the date that the tube was actually first available as the makers would try to get a "Socket Win" from Receiver makers in advance of letting their competitors what they were planing to come out with.



--
Charles MacDonald                 Stittsville Ontario
cm...@zeusprune.ca              Just Beyond the Fringe
http://users.trytel.com/~cmacd/tubes.html
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