RE: Heerlen date code query.

Tubes Asylum

Questions about tubes and gear that glows. FAQ

In Reply to: Heerlen date code query. posted by Sigmund on April 29, 2015 at 19:56:13:

There's a bit of a discrepancy on the code vs type.

This is part of the standard "Philips" code for all their tubes (Philips was the owner of Amperex, Valvo, Mullard, etc). The 7L is their standard code for 6922/E88CC. VR is the standard code for the 7308/E188CC.

The G after the 7L is the version (sometimes a number, sometimes a letter). The 3 or 4-number-letter code after the 7LG gives place of manufacture, and date.

I'd be guessing that the tube you have is a E88CC rather than an E188CC, but I have many tubes in my collection (mainly Philips-type) with inconsistent codes.

If you do a search, you should find guides for Philips Tube Codes.

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Follow Ups Full Thread

Topic - Heerlen date code query. - Sigmund 19:56:13 04/29/15 (6)

RE: Heerlen date code query. - bonzodog 10:11:40 05/01/15 (1)

RE: Heerlen date code query. - Tre' 16:55:22 05/01/15 (0)

RE: Heerlen date code query. - shoot 19:59:50 04/29/15 (3)

Unable to post a pic. nt. - Sigmund 08:02:13 04/30/15 (2)

RE: Unable to post a pic. nt. - unclestu 14:42:44 04/30/15 (1)

Thanks for the info, guys. - Sigmund 17:15:49 04/30/15 (0)

Follow Ups

RE: Heerlen date code query. - bonzodog 10:11:40 05/01/15 (1)

RE: Heerlen date code query. - Tre' 16:55:22 05/01/15 (0)

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