30-11-2016, 09:55 AM
(14-01-2016, 12:14 PM)Terry Wrote: At least with the etched batch codes that Philips used you could always go through your stock looking for a match if you didn't know what the valve came out of!
The etching only refers to all glass valves - it was printed on the base in older types.
If you haven't already seen it, here is a handy list for decoding Philips group codes.
In the UK, of course, these will virtually all carry the Mullard name.






