THE WW2 US ARMY SIGNAL CORPS VALVE NUMBERING SYSTEM -
Posted by STEVE M on
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 = 813
VT145 = 5Z3
VT217 = 811
VT229 = 6SL7GT
VT231 = 6SN7GT
VT197A = 5Y3GT
VT206A = 5V4G
VT244 = 5U4G