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STC Brimar codes

If the valve was for export then the RETMA code was used, sometimes with an SV prefix. Otherwise:

1st figure(s) 1 Halfwave rectifier
8 RF pentode
9 Vari-mu pentode
20 Triode hexode
Letter A 4-volt heater
B 2-volt heater
D Indirectly heated other than 2 and 4V
Figures Serial number

Special purpose valves:

^M ^M ^M ^M ^M
1st figure(s) 2 Diode
  3 Triode
  4 Tetrode
  5 Pentode
  22 Double diode
 33Double triode
  etc.
Letter Max anode dissipation and type
Figures Serial number
Letters Base type and special features (base types below are from checks on STC datasheets)
A American standard base
B British standard base
C Edison screw base
D International octal base
E Special base
G Leads
J Mounted by disc seal
K Miniature button base
L Mounted by end caps
T Mounted in box

 

This file was last modified 15:52:45, Tuesday September 02, 2014