On 2019-06-28 5:04 a.m., Roddy Scott wrote:
EDIT - Philips bought out Mullard in 1928 but still marketed tubes under the Mullard label - I should use Wikipedia more often! Valvo was a German company
Philips was a company of many names. they had an internal system of etch marks with a code for date, design and factory that made a given tube. (not sure if the "specials" would get the full code.)
in each country they sold tubes they used the "local" name, like Mullard generaly a firm they had bought over the years. So Amperex, Philips, Miniwatt, Rogers, Pope, Mullard, and several others were all valid, and often were applied by the local distributor.
https://frank.pocnet.net/other/Philips/PhilipsCodeListAB.pdf is proably a good start -- Charles MacDonald Stittsville Ontario [email protected] Just Beyond the Fringe No Microsoft Products were used in sending this e-mail. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/50c1f415-e318-387a-6e58-475c0bea0e49%40zeusprune.ca. For more options, visit https://groups.google.com/d/optout.
