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Here are Portable Document Format (.pdf) scans of a 1934 Triotron valve data leaflet.
  


TRIOTRON VALVES COMPARATIVE TABLE.

2 VOLT TYPES FOR BATTERY OPERATION.

Mullard Marconi-Osram. Triotron. Cossor. Mazda.
PM12 S21 S207 215SG SG215
PM12A S24 S215 220SG S215A
PM12M VS24 S208 220VSG S215VM
- H2 WD2 210RC H210
PM1HL H210 HD2 210HF HL2
PM2DX HL210 SD2 210Det HL2
- L210 TD2 210LF L2
PM2A P215 ZD2 215P P22A
PM2A LP2 YD2 220P P220
- P2 UD2N 230XP P240
PM202 - E235 - -
PM22A PT2 P225 220PT Pen220A
PM2B B21 E220B 240B 220B

4 VOLT TYPES FOR BATTERY OPERATION.

Mullard Marconi-Osram. Triotron. Cossor. Mazda.
PM14 S410 S409 41SG -
PM3A H410 W420 410RC -
PM3 - H412 410HF -
PM4DX HL410 A430 410LF -
PM4 P410 E414 410P -
PM254 - E425 425XP P425
PM24A PT425 P425 - -

POWER AMPLIFIERS.

Mullard Marconi-Osram. Triotron. Cossor. Mazda.
AC044 PX4 K435/10 4XP PP3/250
D024 PX25 K480 - PP5/400
DO60 DA60 K450/50 - -
PM24M - P435 PT41B -
PM24B PT25 P440 - -

4 VOLT A.C. TYPES.

Mullard Marconi-Osram. Triotron. Cossor. Mazda.
- - S415N - -
- MS4B S410N MSG/LA AC/SG
VP4 VMP4 S434N MVSPen -
SP4 MSP4 S435N MSPen -
904V MH41 A440N 41MH AC2/HL
104V ML4 E430N - ACP
- - B430N - -
Pen/4V PT4 P440N MP/Pen AC/Pen

20 VOLT D.C. TYPES.

Mullard Marconi-Osram. Triotron. Cossor. Mazda.
SP20 - S2035N - -
VP20 - S2034N - -
HL20 - A2040N - -
- - E2020N - -
- - B2030N - -
- - P2020N - -

RECTIFIERS.

Mullard Marconi-Osram. Triotron. Cossor. Mazda.
DW2 U10 G470 506BU UU60/250
DW3 or 4 U14 G4120 460BU UU120/500
- - G4100 - -
- - G4150 - -

© Andy Cowley, 2005    Home