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Electron tubes: manufacturing codes and type numbers

Introduction

In the tables below, the relation between the manufacturing codes en the typenumbers of electron tubes is expressed.
In most cases, the typenumbers are printed on the glass tube with white, heat-resistant paint. This paint can be wiped off quite easily, especcially when the tubes are old. The manufacturing code however, is etched into the glass, mostly near the foot of the tube in a relatively small (2mm) corps.
The tables below are valid for electron tubes produced by Philips, Eindhoven, The Netherlands and associated production units.

The tables are based upon internal Philips documents, dated 1967. The condition of the documents was quite bad, some parts weren't readable at all. These spots are indicate by "?" marks

This document is also available as a zipped Microsoft Excell 5.0 spreadsheet.

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Manufacturing codes A..
 Manufacturing codes P..
Manufacturing codes B..
 Manufacturing codes R..
Manufacturing codes C..
 Manufacturing codes S..
Manufacturing codes D..
 Manufacturing codes T..
Manufacturing codes E..
 Manufacturing codes U..
Manufacturing codes F..
 Manufacturing codes V..
Manufacturing codes G..
 Manufacturing codes W..
Manufacturing codes H..
 Manufacturing codes X.., Y.., Z..
Manufacturing codes I..
 Manufacturing codes d.. ... k..
Manufacturing codes J..
 Manufacturing codes m.. ... t..
Manufacturing codes K..
 Manufacturing codes 0.. ... 2..
Manufacturing codes L..
 Manufacturing codes 3.. ... 5..
Manufacturing codes M..
 Manufacturing codes 6.. ... 8..
Manufacturing codes N..
 Manufacturing codes 9.. ... .

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Manufacturing codes A..

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code type number remarks
AD EC88  
AE EL500  
AF 6EU7  
AG CV4035  
AH PY33  
AI DL97  
AJ 6080  
AM PC97  
AN 1607  
AS YC97  
AT YF183  
AU YF184  
AW 6GK5  
AX 6GK6  
Af CV4011  
A3 E88C  
A4 EC800  
A5 XL500  
A6 EC1000  
A7 PCF802  
A8 6CQ8  
A9 PY83  

Manufacturing codes B..

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code tube number remarks
BA XCF86  
BB 6DK6  
BC E86C  
BD ECH800  
BE 12DT8  
BG E80CF  
BI PEN4DD  
BJ CV4029  
BN E55L  
BP M6EL  
BR 5639  
BS 2GK5  
BT M2EL/38EL  
BU XL84  
BW XCC189  
BX XL36  
BZ M1DL  
Bf CV4049  
B1 M2PE  
B2 M3DV  
B3 M4PCF  
B4 M7EF  
B5 95400  
B6 4-0A31  
B7 M9ECC.1  
B8 M13PCC  
B9 VX8250  
B+ 3GK5  

Manufacturing codes C..

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Code Type number Remarks
CA 35C3  
CB 12CU5  
CC 6CU5  
CD 4GK5  
CE CV1377  
CF 3CS6  
CG OKL1B (p)
CH ECF802  
CI PL84 (m)
CJ VX8189  
CK 6AQ5A  
CL 12AU6A  
CM 12C5  
CN PCF806  
CO 62BTA  
CP PEN4ODD  
CR CZ30  
CS 6-OA31  
CT 8-OA31  
CU PCC34  
CW 18045 (m)
CZ EC95  
Cd 6463  
Cf VX8205  
Ck EC86  
Cm ECC88BEE  
Cr E184CC  
Ct ECC282  
C2 18046 (m)
C3 E81L (m)
C4 V1ELL  
C5 E288CC  
C6 ECC806  
C7 EC900  
C8 PCF801  
C9 XCF802  
C+ YCF802  

Manufacturing codes D..

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Code Type number Remarks
DB VX8252  
DC YCF86  
DD 3BA6  
DE 6BZ6  
DF 6DE6  
DH 12AL5  
DI EL36  
DJ PCC88  
DL PY300  
DM ECF801  
DP PC900  
DR QV10-P8  
DS 7453  
DT 3BE6  
DU 3DE6  
DV 75C1  
DZ EN33  
Dd PCF84  
Df 6201  
Dk PF86  
Dr 3AL5  
Dt 3CB6  
D2 3BZ6  
D+ 18GB5  

Manufacturing codes E..

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Code Type number Remarks
EA 5Y3G  
EB 80 G-base
EB 80 P-base
EC DL93  
ED DL94  
EE DW2  
EF 1561  
EH 1805  
EI VP4B  
EJ VX8179  
EK EB41  
EL EC37  
EM ECC31  
EN ECC32  
EP EF37A  
ER EF91  
ES 1883  
ET EL35  
EU EZ35  
EV OA3/CV3798  
EW FW4/500  
EX PM24M  
EY PF183  
EZ 4614  
Ed SP13  
Ef VX8194  
Ek SP13C  
Em AZ11  
Er 1A7GT  
Et PC13  
E0 4633  
E1 DAC32  
E2 4618  
E3 UY21  
E4 4654  
E5 AL1  
E6 5Z4  
E8 6A8G  
E9 6J7  
E+ 4673  

Manufacturing codes F..

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Code Type number Remarks
FB 4683  
FC DL35  
FD 4688  
FE 4689  
FF 6A8G  
FG VX8114  
FH 6K7  
FI 60EH5  
FJ HCH80  
FK 4699.5  
FL 6J8G  
FM 6F6G  
FN 6F6G  
FP 6V6G  
FR 6V6GT  
FS 12SK7  
FT 12SQ7  
FU 18040  
FV PL3C23  
FW 25Z5  
FX 25Z6  
FY AB2 V-base
FZ ABC1  
Fd ABL1 P-base
Ff 7AU7  
Fk EA70  
Fm AD1  
Fr AP2  
Ft AB3  
F0 AB7  
F1 43  
F2 AK2  
F3 35L6GT  
F4 AL2  
F5 AL4  
F6 B?91  
F7 50L6GT  
F8 AZ1  
F9 78  
F+ AZ4  

Manufacturing codes G..

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Code Type number Remarks
GA ECC88 (m)
GB UM84  
GC VX8167  
GD QV9-P10  
GE EH90  
GF CV131 Plus
GG VX8116  
GH CV133 Plus
GI PC95  
GJ EL81F  
GK CV136 Plus tight cathode
GL CV136 Plus loose cathode
GM EM81  
GN CV138 Plus
GP CV140 Plus
GR CV417 Plus
GS CV465 Plus
GT CV466 Plus
GU CV467  
GV 4641  
GW CV468 Plus
GX CV469 Plus
GY CV858 Plus
GZ CV2129 Plus
Gf 12AU7 n.c.
Gk UCH5  
Gm VX8140  
Gr EC52  
G0 EBL31  
G1 PCF82  
G2 EC57  
G3 EBF89  
G4 EA52  
G5 1EA (p) (300mA-P-uitv.)
G6 6D4  
G+ V2ECC  

Manufacturing codes H..

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Code Type number Remarks
HA DP33 D?33
HB AZ12  
HC AZ31  
HD AZ41  
HE 41  
HF DK33  
HG VX8141  
HH CBL1  
HI XC95  
HJ EF97  
HK CBL31  
HL ECH41  
HM UM5  
HN UL43  
HP UCH41  
HR CL4  
HS CZ40 (g) o.c.
HT CL33  
HU CY1  
HV CBC1 P-base
HW CY2  
HX CY31  
HY 60FX5  
HZ CK1 (m)
Hd ECL80 (m)
Hf E83CC  
Hk EF92  
Hm EL38  
Hr DF21  
Ht DF22  
H0 5ECC (p)
H2 DF70  
H3 CF50  
H4 DK21  
H5 EL44  
H6 DK40  
H7 DL21  
H9 DL40  
H+ DL41  

Manufacturing codes I..

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Code Type number Remarks
IA ORP20PW  
IB ORP20  
IC ECF83  
ID E182CC  
IE 4152-02  
IF PC93  
IG 6205  
IH 185BT  
II EL360  
IJ VX8240 (tot 3.8.58: PM84)
IK PZ36  
IL 6286  
IM 27SU  
IN ORP90  
IP PCC189  
IR TY86P  
IS GZ37  
IT 6BJ6  
IU VX8227  
IV E180CC (m)
IW E181CC (m)
IX ECC189  
IY PM84  
IZ ORP30  
Id 95398  
If EC156 ?
Ik EC157  
Im PF83  
Ir EC158  
It PY180  
I0 ORP11  
I1 6211  
I2 ORP10  
I3 PC92  
I4 EF183  
I5 EY180  
I6 12AX7 n.c.
I7 XCF80  
I8 XCH81  
I9 XF80  
I+ 7025  

Manufacturing codes J..

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Code Type number Remarks
JA HCC85  
JB EF184  
JC ORP31  
JD PL500  
JE PC88  
JF CBL6  
JG EA50  
JH ECF1  
JP EL30  
JU YCF80  
JZ TH2  
Jd UCC83  
Jf ECF806  
J8 3DF6  
J9 V3ECH  
J+ YCL84  

Manufacturing codes K..

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Code Type number Remarks
KA DL71  
KB DLL21  
KC DLL31  
KD E1C  
KE EL34 o.c.
KE.2 EL34 n.c.
KF DC89  
KH E424N  
KI M8144  
KJ EF98  
KK DAC21  
KK DAC31  
KL E443H  
KM E447  
KN EC81  
KP EA40  
KS EA51  
KT EAF41  
KU EB34  
KV CBC1 M-BASE
KW EB40  
KX EY51  
KY EBC3  
KZ EBC33  
Kd EM1  
Kf PL83BEE  
Kk EM4  
Km EM34  
Kt EQ80  
K0 EBF2  
K1 PCC809  
K2 EZ41  
K3 EBF11  
K4 EBF32  
K5 EBF35  
K6 EBL1  
K7 EBL21  
K8 EBFS40  
K9 EC40  
K+ EC41  

Manufacturing codes L..

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Code Type number Remarks
LA DK32  
LB EC81 (g)
LC ECC40  
LD UY11  
LE ECH3  
LF ECH4  
LG VX8206  
LH 4671  
LI UBF89  
LK EFF51  
LL ECH11  
LM ECH21  
LN ECH33  
LP DA90  
LR ECH35 Mullard
LS ECH41  
LT ECH80 Glas
LU ECL11  
LV TDD4  
LW DC79  
LX EF93  
LY EE1  
LZ EF6  
Ld EW60  
Lf ECL83 (m)
Lk EZ2  
Lm EL91  
Lr EZ4  
Lt EF80 (m)
L0 EF8  
L1 EF9  
L2 E1F  
L3 DF65  
L4 EF11  
L5 EF12  
L6 EF22  
L7 EF36  
L8 EF39  
L9 EF40 (g)
L+ EF41 (g)

Manufacturing codes M..

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Code Type number Remarks
MA EF42  
MB EF50  
MC EF51  
MD EF100  
ME DL65  
MF EFM1  
MG VX8207  
MH EFM11  
MI EL86 (m)
MJ EBF83 (m)
MK DL21S  
ML EFP20  
MM EFP60  
MN EK2  
MP EK32  
MR EL2  
MS EL3(N)  
MT EBF80  
MU UB41  
MV TDD13  
MW EL6 100 V
MX EL11  
MY EL12  
MZ EL20  
Md EL81 (m)
Mf PCF82  
Mk PL38  
Mm GZ40 o.c.
Mr KB2  
Mt KBC1  
M0 EL32  
M1 EL33  
M2 EBC80 Glas
M3 EL39  
M4 EL41 (g)
M5 EL42  
M6 EL42  
M7 EL8  
M9 EL60  
M+ EL80 Glas

Manufacturing codes N..

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Code Type number Remarks
NA PL83 (g)
NB KF3  
NC KK2  
ND KL4  
NE AZ50  
NF UAF41  
NG 5651  
NH UAF42 (g)
NJ ECH83 (m)
NK UL41 (g)
NL UBF11  
NM UBL1  
NN UCH41  
NP UBL21  
NR UCH4  
NS UCH11  
NT UCH21  
NU UCH42 (g)
NV TDD13C  
NW UAF100  
NX UCH100  
NY UCL11  
NZ UF9  
Nd UF11  
Nk PY80 (m)
Nm UF41 (g)
Nr UF100  
Nt UY2  
N0 UL100  
N1 UL4  
N2 UY1N  
N3 UF21  
N4 EL41 (g)
N5 UY41 (g)
N6 UY100  
N7 UY42 (g)
N8 VCL11  
N9 CF2  
N+ VY2  
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last updated 3 mei 2003