| * | No exact equivalent | B4 | 4 volt battery | IA4 | Indirect 4v AC | DA6 | Direct 6v AC |
| B2 | 2 volt battery | B6 | 6 volt battery | DA4 | Direct 4v AC | DA10 | Direct 10v AC |
| MULLARD | COSSOR | MARCONI, OSRAM |
MAZDA | SIX-SIXTY | Type | Fil |
| PM12M | 220VS | VS2 | S215VM | 218VSG | Screened grid multi-mu, tetrode | B2 |
| PM12V | 220VSG | * | * | 215VSG | Screened grid HF amp, tetrode | B2 |
| PM12A | 220SG | S22 | S215B | 218SG | Screened grid HF amp, tetrode | B2 |
| PM12 | 215SG | S215, S21 |
S215A, SG215 |
215SG | Screened grid, tetrode | B2 |
| PM1A | 210RC | H2 | H210 | 210RC | Resistance/capacity coupled triode | B2 |
| PM1HF | 210HF | HL210 | * | 210HF | Med. imp. HF or detector, triode | B2 |
| PM1HL | 210HL | HL210 | HL210, HL2 |
210HL | Non-microphonic detector, triode | B2 |
| PM1LF | 210LF | L210 | * | 210LF | Med. imp. LF or detector, triode | B2 |
| PM2DX | 210Det | L2/B | L210, L2 | 210D | Detector & LF amplifier, triode | B2 |
| PM2A | 220PA | LP2 | P220 | 220PA | Power output, triode | B2 |
| PM2 | 220P | P215 | * | 220P | Power output, triode | B2 |
| PM202 | * | P2 | P220A | 220SP | Super power output, triode | B2 |
| PM252 | 230XP | P240 | P240 | 240SP | Super power output, triode | B2 |
| PM22A | 220HPT | PT2 | Pen220 | 220Pen | Low consumption output, pentode | B2 |
| PM22 | 230HPT, 220PT |
PT240 | Pen230, Pen220A |
230PP | Super power output, pentode | B2 |
| PM2B | 220B | * | PD220 | * | Class B output, triode | B2 |
| PM14 | 410SG | S410 | * | 4075SG | Screened grid, tetrode | B4 |
| PM3A | 410RC | H410 | * | 4075RC | Resistance/capacity coupled triode | B4 |
| PM3 | 410HF | HL410 | * | 4075HF | Med. imp. LF or detector, triode | B4 |
| PM4DX | 410LF | L410 | * | 410D | Med. imp. LF or detector, triode | B4 |
| PM4 | 410P | P410 | * | 410P | Power output, triode | B4 |
| PM254 | 425XP, 415XP | P415, P425 |
P425 | 420SP | Super power output, triode | B4 |
| PM16 | 610SG | S610 | * | 6075SG | Screened grid, tetrode | B6 |
| PM5X | 610HF | HL610 | HL610 | 6075HF | Med. imp. LF or detector, triode | B6 |
| PM6D | 610LF | L610 | * | 610D | Med. imp. LF or detector, triode | B6 |
| PM256 | 625P | P625 | P625B | 625SP | Super power output, triode | B6 |
| PM256A | 610XP | P625A | P625A | 625SPA | Super power output, triode | B6 |
| PM26 | 615PT | PT625 | * | 617PP | Super power output, pentode | B6 |
| VP4 | * | * | * | HP2AC | Screened grid multi-mu HF, tetrode | IA4 |
| SP4 | MSPen | * | * | HP1AC | Screened grid HF amp, tetrode | IA4 |
| MM4V | MVSG | VMS4 | AC/SGVM | 4MMAC | Screened grid amp multi-mu, tetrode | IA4 |
| S4VA | * | * | AC/S2 | 4XSGAC | Screened grid amp, tetrode | IA4 |
| S4VB | MSG/LA | MS4, MS/4/B |
AC/SG | 4YSGAC | Screened grid amp, tetrode | IA4 |
| TDD4 | * | MHD4 | * | * | LF amp & detector, double diode triode | IA4 |
| SD4 | * | * | * | * | SG LF amp & detector, diode tetrode | IA4 |
| 904V | 41MH | * | AC2/HL | 4DXAC | High magnification detector, triode | IA4 |
| 354V | 41MHF | MH4 | ACHL | 4GPAC | Detector & general purpose, triode | IA4 |
| 244V | 41MHL | MHL4 | * | 4HLAC | General purpose, triode | IA4 |
| 164V | 41MLF | * | * | 4LAC | General purpose, triode | IA4 |
| Pen4V | MPPen | * | * | 4PenAC | Power output, tetrode | IA4 |
| Pen4VA | MPPenA | MPT4 | ACPen | * | Power output, tetrode | IA4 |
| ACO64 | * | * | * | HV 4/1 | Output amp, triode | DA4 |
| ACO44 | 4XP | PX4 | PP3/250 | HV 4/2 | Output amp, pentode | DA4 |
| DO24 | * | PX25 | PP5/400 | * | Output amp, triode | DA4 |
| DO25 | 620T | LS6A | * | HV 6/5 | Output amp, triode | DA6 |
| DO26 | * | * | * | * | Output amp, triode | DA4 |
| PM24A | * | * | * | 4PenSP | Output amp, pentode | DA4 |
| PM24M | PT41 | PT4 | * | 4PenM | Output amp, pentode | DA4 |
| PM24D | * | PT25 | * | * | Output amp, pentode | DA4 |
| DO60 | 660T | DA60 | * | * | Output amp, triode | DA6 |
| DO75 | * | * | ES75 | * | Output amp, triode | DA10 |
| DW2 | 506BU | U10 | UU4 | W462 | 60mA @ 250v, double diode rectifier | DA4 |
| DW3 | 442BU | U12 | UU120/350 | W120/350 | 120mA @ 350v, double diode rectifier | DA4 |
| DW4 | 460BU | U14 | UU120/500 | W120/500 | 120mA @ 500v, double diode rectifier | DA4 |
| IW2 | * | * | UU2 | W60/250 | 60mA @ 250v, double diode rectifier | IA4 |
| IW2A | * | * | UU60/250 | IH60/250 | 75mA @300v, double diode rectifier | IA4 |
| IW3 | * | * | * | * | 120mA @ 350v, double diode rectifier | IA4 |
Valves with 2 Volt Filaments (Battery)
|
Philips
|
Gecovalve
|
Cossor
|
Mullard
|
Tungsram
|
|
B217
|
L21
|
215P
|
PM2DX
|
LP220
|
|
B228
|
HL2K
|
210HF
|
PMIHL
|
LD210
|
|
B240
|
B21
|
|
PM2BA
|
CB220
|
Valves with 4 Volt Filaments (Battery)
|
Philips
|
Visseaux
|
Mazda
|
Fotos
Grammont |
Dario
|
Valvo
|
Gecovalve
|
Cossor
|
Mullard
|
Vatea
|
Telefunken
|
Tungsram
|
Zenith
|
|
A409
|
RO4109
|
DZ908
/TM2 |
C9
|
R75
|
H406
|
|
|
|
UX406
|
RE074
|
L414
/G407 |
|
|
A410
|
RO4010
|
DZ2222
|
B35
|
R36
|
|
HL410
|
|
|
H406
|
RE064
|
G405
|
|
|
A414
|
|
|
|
|
|
|
|
PM4DS
|
|
|
G410
|
|
|
A415
|
RO4324
|
DZ1508
|
D15
|
R76
|
|
L410
|
|
|
HX406
|
|
LD410
|
|
|
A425
|
RO4125
|
DZ2222
|
C25
|
RT63
|
W406
|
HL410
|
410HF
|
|
RX406
|
RE034
|
HR406
|
|
|
A435
|
RO4135
|
DZ3529
|
B25
|
|
|
|
410RC
|
PMÁ
|
|
|
HR406
|
|
|
A441
|
RO4141
|
DZ1
/TMBG |
MX40
|
R43
/TA41 |
U409D
|
BG4
|
410DG
|
PM4DG
|
DX406
|
RE074D
|
DG407
|
|
|
A442
|
RO4142
|
DZ2
|
C150
|
TA42
|
H406D
|
S410
|
410SG
|
|
SX406
|
RES094
|
S4066
|
|
|
B403
|
|
|
D5
|
|
|
|
425XP
|
|
|
|
P415
/P430 |
|
|
B405
|
RO4305
|
DX502
|
D5
|
R77
/TB05 |
L414
|
P415
|
415XP
|
PM254X
|
LX414
|
RE124
|
P414
|
|
|
B406
|
RO4206
|
DY604
|
|
TB06
|
L410
|
P410
|
|
PM4X
|
LX410
|
RE114
|
P410
|
|
|
B409
|
RO4309
|
DX804
|
D9
|
RT77
/TB09 |
L413
|
|
410LF
|
PM4
|
UX406
|
RE124
|
L414
|
|
|
B415
|
|
|
|
|
|
|
410PT
|
|
|
|
L414
|
|
|
B424
|
RO4324
|
DZ908
|
C9
|
TB24
|
A411
|
L410
|
|
PM3DX
|
|
|
HR406
|
|
|
B425
|
|
DW302
|
|
|
|
|
|
|
|
REN604
|
|
C406
|
|
B438
|
RO4324
|
|
D40
|
|
W411
|
|
|
|
|
|
HR410
|
|
|
B442
|
RO4142
|
|
|
TB42
|
|
|
|
|
|
RES024
|
S410
|
|
|
B443
|
RO4243
|
DX3
|
D100N
|
TB43
|
L415D
|
PT425
|
410PT
|
PM24
|
TL414
|
RES174D
|
PP415
|
|
|
B443S
|
|
|
D60
|
TB438
|
L416D
|
PT425
|
|
|
|
RES164
|
PP416
|
|
|
B543
|
|
|
|
|
L510D
|
|
|
|
TL510S
|
RES105
|
PP610
|
|
Valves with 4 Volt Filaments
|
Philips
|
Visseaux
|
Mazda
|
Fotos
Gram- mont |
Dario
|
Osram
|
Record
|
Valvo
|
Geco
Valve |
Cossor
|
Mullard
|
Vatea
|
Tele-
funken |
Tungsram
|
|
C405
|
|
DW302
|
|
|
|
|
LK430
|
|
|
PM254
|
PX430
|
RE304
|
P430
|
|
C443
|
RS4343
|
DW3
|
F100
|
TC43
|
|
|
L425D
|
PT4
|
|
PM2Â
|
TW425
|
RES364
|
PP430
|
|
C443N
|
|
|
|
TC43N
|
|
|
L427D
|
|
|
PM24DC
|
|
RES374
|
PP431
|
|
D404
|
RO4404
|
DW802
|
P10
|
|
|
|
LK600
|
|
|
AC044X
|
PX460
|
RE604
|
P460
|
|
D410
|
RO4610
|
|
F10
|
|
|
|
|
|
|
AC064X
|
|
|
P455
|
|
E406
|
601
|
DW601
|
P10/F5
|
TE06
|
PX4
|
|
|
PX4
|
4XP
|
AC064
|
PX4110
|
RE604
|
P4100
|
|
E408/B425
|
|
DW302
|
|
TE08
|
|
|
LK4110
|
|
|
AC084
|
|
RS241
|
|
|
E409
|
RS4309
|
DW1003
|
|
|
|
|
|
|
|
|
|
RENS1104
|
AL495
|
|
E415/E424
|
RS4215
|
|
S415N
|
TE15
|
|
|
A4100
|
MHL4
|
41MLF
|
224V
|
HV4100
|
REN804
|
AG4100
|
|
E424
|
RS4324
|
DW4011
|
TL415
|
TE24
|
|
|
A4110
|
MH4
|
41MHF
|
354V
|
RV4100
|
REN904
|
AG495
|
|
E435
|
RS4230
|
|
S440N
|
TE38
|
|
|
|
MH4
|
|
|
|
|
|
|
E438
|
RS4238
|
DW4023
|
S440N
|
TE38
|
|
|
W4080
|
|
41MH
|
354VX
|
RV4110
|
REN1004
|
AR4100
/AR4701 |
|
E441
|
RS4341
|
DW1B
|
TM4
|
TE41
|
|
DN44
|
A4100D
|
MBG4
|
41MDG
|
AC/DG
|
DV4100
|
REN704D
|
GD4101
|
|
E442
|
RS4142
/RS4342 |
DW6
|
S4150
|
TE42
|
|
|
H4100D
|
MS4
|
MSG/HA
|
S4V
|
SV4100
|
|
AS494
|
|
E442S
|
RS4142N
|
DW2
|
S4150E
|
TE42S
|
|
|
H4080D
|
|
41MSG
|
S4VX
|
SV490
|
RENS1204
|
AS4100
|
|
E443H
|
RS4543
|
DW11
|
|
TE43H
|
|
|
L496D
|
|
|
PM24M
|
TV4110
|
RES964
|
PP4101
|
|
E444
|
RS4144
|
|
T4400
|
TE44
|
|
|
AN4126
|
|
|
SD4
|
SB4110
|
RENS1254
|
DS4100
|
|
E444S
|
|
|
|
TE44S
|
|
|
AN4092
|
|
|
TD4
|
RB4110
|
REN924
|
DS4101
|
|
E445
|
RS4142
|
DW8
|
S4150C
|
TE45
|
|
|
H4125D
|
|
|
YM4V
|
MV4100
|
RS1214
|
|
|
E446
|
RS4346
|
|
T4600
|
TE46
|
|
|
H4128D
|
MSP4
|
|
SP4
|
ST4110
|
RENS1284
|
HP4100
|
|
E447/AF2
|
RS4347
|
|
T4700
|
TE47
|
|
|
H4129D
|
VMP4
|
|
VP4
|
MT4110
|
RENS1294
|
HP4106
/AS4100 |
|
E448
|
|
|
T4000
|
TE48
|
|
|
X4122
|
|
|
DH4
|
QU4100
|
RS1224
|
MH4100
/FH4105 |
|
E449
|
|
|
|
TE49
|
|
|
X4123
|
|
|
VH4
|
QT4100
|
RENS1234
|
FH4105
|
|
E452T/AF2
|
RS4342
|
DW7
|
T4500
|
TE52
|
|
|
X4111D
|
MS4B
|
MSGLA
|
S4VB
|
SV4110
|
RENS1264
|
AS4120
|
|
E453
|
RS4353
|
DW9
|
S100
|
TE53
|
|
|
L4150D
|
MPT4
|
Mp PEN
|
PEN 4vx
|
|
RENS1374
|
APP4120
|
|
E455
|
RS4345
|
DW8
|
T4500C
|
TE55
|
|
|
H4115D
|
VMS4B
|
MVSG
|
MM4V
|
MV4110
|
RENS1274
|
AS4125
|
|
E462/E446
|
|
|
|
|
|
|
|
|
|
|
|
|
AS4120
|
|
E463
|
|
|
|
TE63
|
|
|
L4138D
|
|
42mp
PEN |
PEN 4va
|
TK4110
|
RES1384
|
APP4130
/APP4120 |
|
E499
|
|
|
|
TE99
|
|
|
W4110
|
|
|
994V
|
RV4110
|
REN914
|
AR495
|
|
F443
|
|
|
|
TE43
|
|
|
L495D
|
PT25
|
|
PM24D
|
TV4200
|
|
PP4101
|
|
AB1
|
|
|
NDD40
|
TB1
|
|
|
AB1
|
|
DD4
|
2D4
|
BB4110
|
AB1
|
DD465
|
|
AF2
|
|
DW2
|
|
TF2
|
|
|
AF2
|
|
|
VPÂ
|
NT4110
|
AF2
|
HP4115
/HP4106 |
|
AK1
|
|
|
|
TK1
|
|
|
|
|
|
FC4
|
SO4110
|
AK1
|
MO465
|
Valves with 20 Volt Filaments (approximate equivalent)
|
Philips
|
Telefunken
|
Dario
|
Mullard
|
Tungsram
|
Valvo
|
Vatea
|
|
B2006
|
REN1822
|
CT06
|
HL20
|
P2018
|
L2213
|
LG2018
|
|
B2038
|
REN1821
|
CT38
|
HL20
|
R2018/G2018
|
A2118
|
AG2018
|
|
B2041
|
RENS1817D
|
CT41
|
|
DG2018
|
U1718D
|
DG2018
|
|
B2042
|
RENS1820
|
CT42
|
SG20A
|
S2018
|
H2018D
|
SG2018
|
|
B2043
|
RENS1823
|
CT43
|
Pen20
|
DG2018/PP2018
|
L2318D
|
TL2018
|
|
B2044
|
|
|
|
|
|
|
|
B2045
|
RENS1819
|
CT45
|
VM20
|
S2018/SE2018
|
H1918D
|
MG2018
|
|
B2046
|
RENS1884
|
CT46
|
SP20
|
HP2018
|
H2518D
|
ST2118
|
|
B2047
|
RENS1894
|
CT47
|
VP20
|
HP2118
|
H2618D
|
MF2118
|
|
B2052T
|
RENS1818
|
CT52
|
SG20
|
SS2018
|
H1818D
|
SG2118
|
|
B2055
|
|
CT55
|
MM20
|
SE2118
|
|
|
|
B2099
|
|
|
|
R2018
|
|
|
|
BL2 (30Volts)
|
BL2
|
TE40
|
|
PP4018
|
BL2
|
|
Valves with 4 Volt Filaments ( approximate equivalent)
|
Philips
|
Fotos
Grammont |
Dario
|
Valvo
|
Mazda
|
Cossor
|
Mullard
|
Telefunken
|
Tungsram
|
Vatea
|
Visseaux
|
Gecovalve
|
|
505
|
|
TV105
|
G495
|
|
412SU
|
DU4
|
RGN1304
|
V495
|
|
V1
|
|
|
506
|
W6
|
TV80
|
G490
|
D380B
|
442BU
|
DW2X
|
RGN1054
|
PV495
|
RE4100
|
V2
|
U10
|
|
1561
|
V22/W10
|
TV90
|
|
|
460BU
|
|
RGN2004
|
PV4002
/PV4201 |
|
|
|
|
1562
|
W20
|
|
|
|
|
DU15
|
|
|
|
|
|
|
1801
|
V21B
|
TV60
|
G430
|
D350B
|
506BU
|
DW1
|
RGN504
|
PV430
|
RE450
|
V250
|
|
|
1802
|
V21M
|
TV61
|
|
|
|
|
RGN354
|
V430
|
RE425
|
V150
|
|
|
1805/506
|
|
TV81
|
G4100
|
|
|
DW7X
|
RGN1064
|
PV4100
|
RE4110
|
|
|
|
1815/1817
|
W10
|
TV100
|
G4250
|
|
4ÍU
|
DW4
|
RGN2504
|
PV4201
|
|
|
U14
|
|
1832
|
V22-23
|
TV90
|
G4200
|
D5125B
|
460BU
|
DW3
|
RGN2004
|
PV4200
|
RE4200
|
V480
|
U12
|
