THE GREAT MULLARD MAGIC BLOG — vt valve code
THE GENERAL POST OFFICE (GPO) VT VALVE NUMBERING SYSTEM
Posted by STEVE M on
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...