THE GREAT MULLARD MAGIC BLOG — US tube numbering system

THE WW2 US ARMY SIGNAL CORPS VALVE NUMBERING SYSTEM -

Posted by STEVE M on

THE WW2 US ARMY SIGNAL CORPS VALVE NUMBERING SYSTEM -

The US Signal Corps, used a numbering system of VT numbers, incidentally, the VT stands for Valve, thermionic – three electrode – a bit of a to do if you want to list a beam tetrode!!!! .  The military look up table MIL-HDBK-213A is required to decode the 289 valves identified in this manner.  However, for the ardent audiophiles, I have prepared this list of the most desired devices:- VT4C = 211 VT66 = 6F6 VT74 = 5Z4 VT80 = 80 VT94 = 6J5 VT95 = 2A3 VT100A = 807 VT107 = 6V6 VT115 = 6L6 VT126 = 6X5 VT144 =...

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