THE GREAT MULLARD MAGIC BLOG — gpo vt numbering

THE GENERAL POST OFFICE (GPO) VT VALVE NUMBERING SYSTEM

Posted by STEVE M on

THE GENERAL POST OFFICE (GPO) VT VALVE NUMBERING SYSTEM

Confusing or what, the GPO had their own Valve - Thermionic numbering system comprising of a sequence of numbers in range from VT17 to VT207.  Although this alphanumeric code followed the same form as the US Signal Corps one it was quite different.    I have produced a look up table that related GPO VT number with UK CV number and commercial equivalent numbers - a first for the internet I think.  Enjoy:- GPO VT NUMBER CV NUMBER COMMERCIAL NUMBER   VT19 CV1612 VT9B VT24 CV1636 LS5 VT25 CV1637 LS5 VT26 CV1600 CAT1 VT27 CV1601 CAR1 VT31 CV1638 4101D VT33 CV1642 DER VT34 CV1614...

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