Tube date codes

Hello - any tube heads know of a site or reference source of how to decode date codes on tubes? I'd sure appreciate a lead if you folks know of such a place - thanx!

 

There may be something at this site that is of use
http://www.worldtubeaudio.com/directory/directory.htm

this is one of the sites that can be accessed from above
http://w1.871.telia.com/~u87127076/tabeller/index.htm

All the best - Andrew

 

Wowser - I'd need a lifetime to browse the gzillion sites - whew, if you like tubes you'll probably spend days looking at all the links...

 

This page summarizes the way the Mullard/Philips/Valvo codes work and has links to spreadsheets that have all the model codes. Another link goes to a JPG that has the letter used for each different factory.

Mullard codes

Regards,
Geoff

 

Wow again - thanks Geoff! This sharing of info is what makes Steve's sandbox a great place to play - excellent info for demystifying the wacky codes on those particular tubes...

 

Here's a handy code reference:

http://www.triodeel.com/eiacode.htm

and an old but interesting article on tubes vs. solid state:

http://www.milbert.com/tstxt.htm