THE GREAT MULLARD MAGIC BLOG — GEC

I HAVE A BOX OF OSRAM VALVES - WHAT DO THE NUMBERS ON THEM MEAN?

Posted by STEVE MYCIUNKA on

I HAVE A BOX OF OSRAM VALVES - WHAT DO THE NUMBERS ON THEM MEAN?

Those clever chaps at GEC-Osram made some of the most memorable and sought after valves made by any manufacturer, they chose valve base styles that were not used by anyone else at the time and envelope shapes which were not at the time used by anyone else so why should their valve numbering system be the same as anyone elses?     Anyhow, I digress for here is a handy little table that will allow you to classify the kinky GEC from the vari-mu GEC - I hope you will find it useful: - Letter Identifier Classification A Industrial device...

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