This page provides some useful data that may help you repairing valve/non valve equipment. PLEASE NOTE,I CAN SUPPLY VALVE DATA VIA EMAIL OR MY WEBSITE,IF YOU NEED ANY INFORMATION/DATA PLEASE EMAIL ME USING THE SITES CONTACT PAGE STATING WHAT YOU NEED AND I WILL DO MY BEST TO HELP YOU.

                                        VALVERADIO.CO.UK REFERENCE SECTION

                                                RESISTOR COLOUR CHART(4 BAND)

BAND1                             BAND2                              BAND3                           BAND4

1ST DIGIT                     2ND DIGIT                       MULTIPLIER                 TOLERANCE

BLACK=0                     BLACK=0                           BLACK=1

BROWN=1                  BROWN=1                         BROWN=10                    BROWN=1%

RED=2                           RED=2                                  RED=100                      RED=2%

ORANGE=3               ORANGE=3                        ORANGE=1000

YELLOW=4                YELLOW=4                       YELLOW=10000            

GREEN=5                     GREEN=5                          GREEN=100000

BLUE=6                         BLUE=6                           BLUE=1000000                     

VIOLET=7                    VIOLET=7

GREY=8                      GREY=8                           GOLD=0.1                             GOLD=5%

WHITE=9                  WHITE=9                           SILVER=0.01                     SILVER=10%

 

                                                                  5 BAND

BAND1                   BAND2                     BAND3                        BAND4                  BAND5

1ST DIGIT          2ND DIGIT                3RD DIGIT                 MULTIPLIER           TOLERANCE

BLACK=0           BLACK=0                  BLACK=0                 BLACK=1

BROWN=1         BROWN=1                 BROWN=1               BROWN=10           BROWN=1%

RED=2                 RED=2                         RED=2                     RED=100                RED=2%

ORANGE=3        ORANGE=3             ORANGE=3             ORANGE=1000     

YELLOW=4        YELLOW=4             YELLOW=4            YELLOW=10000

GREEN=5             GREEN=5                GREEN=5               GREEN=100000

BLUE=6               BLUE=6                    BLUE=6                   BLUE=1000000

VIOLET=7           VIOLET=7              VIOLET=7        

GREY=8               GREY=8                  GREY=8                    GOLD=0.1                  GOLD=5%

WHITE=9             WHITE=9                WHITE=9                SILVER=0.01              SILVER=10%

                                           OLDER RESISTOR COLOUR CODING

With older resistors you did not have a band system,but a "dot" system,the body of the resistor was coloured,the tip was coloured and then there was a spot of paint on the body of the resistor. The colour coding was exactly the same as for modern resistors. READ IN THE FOLLOWING SEQUENCE..BODY,TIP,SPOT. If the body was red,the tip was orange and the spot was brown the resistor would be 230 ohms.

BODY=1ST DIGIT.....TIP=2ND DIGIT.....SPOT=MULTIPLIER.

 

                                               CAPACITOR CONVERSION TABLE

                                                1PF=0.001NF

                                                10PF=0.01NF

                                               100PF=0.1NF=0.0001UF

                                               1000PF=1NF=0.001UF

                                               10000PF=10NF=0.01UF

                                               100000PF=100NF=0.1UF

                                               1000000PF=1000NF=1UF

 

                                      SLEEVE COLOUR IDENTIFICATION USED IN OLDER GEC RADIOS

White...high potential connections to the aerial circuits,first section of the bandpass circuit and non-earthy side of the speech coil.

Green...grid connections and high potential ends of signal circuits.

Blue...screening grid circuits.

Pink...cathode connections

Orange...connections to valve anodes.

Black...earth wiring.

Slate...h.t. negative when not connected to earth.

Red...h.t. smoothed.

Red/White...h.t. unsmoothed. Where smoothing choke is in positive leg.

green/white...grid decoupling and a.v.c. circuits.

black/red.  black/white.       heaters

black/red...l.t. positive in battery sets.

 

                                                       BATTERY WIRE COLOUR CODE IN OLDER RADIOS

red...highest positive voltage.

maroon/red...2nd positive voltage.

maroon...3rd positive voltage.

black with red tracer...negative h.t.

yellow...positive l.t. voltage.

black with yellow tracer...negative l.t. voltage.

green...positive bias voltage.

black with green tracer...maximum negative bias.

black/green...2nd negative bias.

                    

                                     THORN TRANSISTOR EQUIVALENTS

AF1=BC214L, BC154, BC179B, MPS6522

AF2=2N3707, BC184L, BC114, BC109, BC169

AF3=2N3711, BC183LB, BC172B, BC108B

AF4=BFY52, BSY54, TIS90, BC175

AF5=AC142, AC153, AC128

AF6=BC107, TIS90, BC152

AF7=AC156, AC151, AC192, OC75

AF8=AC138, AC151, AC128

AF9=AC138

AF10=2N2904

AF11=2N3702, BC186

AF12A=TIS91M

AF12B=TIS90M

AF13=BC153, BC213L, BC186, BC158

AF14=U14727/1

AF15=BC114

AF16=BC212L

AF17A=E9005

AF17B=E9004

AF18=BC148

AF19=BC384LC, ZTX384C, BC413C

AF20=ME4102

AF21=BC328, ME0404

AF22=ME0412

AF23=ME6002

AF24=BC149

AF25=BC337

 

D1=OA90, AA112, SFD104

D2=BA151, BA147, BA114, 1S44

D3=A8A21

D4=MR150, BZY85C15, BZY94C15

D5=AC169, ATESD4

D6=BA110, BA121

D7=BB103, SMV560

D8=BY124, Y730

D9=BB104

D10=1S2068A

D11=S6M1, 10D2, 1N2070, TV6

D12=OA90, SFD104, AA113

D13=HCX25, U14710/1

D14=AA119, CG61, SFD110, AA112

D15=BY126, BY237

D16=BY127, BY238

D17=1N4448

D18=Y933

D19=S6M1

D20=HG5008, OA90

D21=HG5065, DK13

D22=HS9078, BA130

D23=OA91

D24=1S44, BA128, BA154, 1N4148, ITT44, U35063/2

D25=BA129, BA148, BY201/3, F099/2

D26=C1129

D28=BY126, TIX4001

D29=BA159, BY203/12, MR818, IRBB10

D30=BA148F, ISX164, IRBB4, BA157, BY201/4

D31=F203, XK3017

D32=ITTZW6.8, 1S2068, 1N5235

D34=F094

D35=C1063

D36=HS7135, ZF13P

D37=BZY88C12, BZX83C12, 1S2120, ZF12P

D38=BZX73C11, BZX79C11, 1S2110A, ZF11P

D39=1N4001

D40=1S923, ITT923

D41=BZX79C4V7, BZX83C4V7, 1S2047A, ZF4.7P

D42=MR854, A115C

D43=S5M1

D44=SN76552

D45=U14735 (STRAPPED BASE TO COLLECTOR)

 

0P1A=AC142HK

0P1B=AC141HK

0P2A=AC128

0P2B=AC176

0P3A=AC142K

0P3B=AC141K

0P4A=MPS8512

0P4B=MPS8112

0P5A=BC460

0P5B=BC440

0P6A=AC188K

0P6B=AC187K

0P7=AC141K+AC142K, AC176K+AC153K, AC176K+AC128K

0P8A=TIP32A

0P8B=TIP31A

0P9A=R2323, BRC6109

0P9B=R2322, BRC5296

0P10A=BC139, BFR62

0P10B=BC119, BFR52

0P11A=BD436

0P11B=BD435

 

RF1=BF160, BF216

RF2=BF160, BF217

RF3=BF273, BF237, BF218

RF4=BF274, BF238, BF219

RF5=AF125, AF115

RF6=AF126, AF116

RF7=BF194

RF8=BF256S

RF9=BF195

 

TVT1=AF239

TVT2=AF139

TVT3=BF196, BF367

TVT4=BF194, BRC194

TVT5=BF197

TVT6=BF157B, BF178, BF257A, BF336

TVT7=BC117

TVT8=BC147, BC182L, ME4101, BC115

TVT9=BC148

TVT10=BC159

TVT11=BF195

TVT12=MJE340

TVT13=BC157, BC212L

TVT14=BC147, 2N3711, BC347A, BC147B

TVT15=BC149, BC208B, BC183LC, BC349B

TVT16=BC298, BFX38

TVT17=BC441, BC323

TVT18=TIS90, BC267B

TVT19=AU113

TVT20=BD215

TVT21=BC337, TIS90

TVT22=R2461

 

VS1=AD143