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


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