Factory Valve Codes
When cleaning valves it is all too easy to rub the numbers off.
As well as the ones which are printed on there is another set either etched or engraved on which not only reveal the type but also the date and place of manufacure.
This guide is for Philips valves and includes Mullard
As well as the ones which are printed on there is another set either etched or engraved on which not only reveal the type but also the date and place of manufacure.
This guide is for Philips valves and includes Mullard
| philips_factory_valve_codes.pdf |
