Does anyone know how to interpret the codes marked on loudspeakers?
I have a 15" L/S with the following codes printed in white:
On the chassis (Pressed steel)
10684 152351
and on the cone 35020
Thanks Tony.
Tubes and CRT's EIA code
Amperex (USA) 111
Bendix 125
DuMont 158
Eimac (Eitel-McCullough, Inc) 162
Electronic Tube Corp 169
General Electric Co (USA) 188
Hytron (CBS-Hytron) 210
Machlett 231
RCA (Radio Corp of America) 274
Raytheon 280
Superior Tube Co 310
Sylvania (Hygrade Sylvania Corp) 312
Tung-Sol 322
United Electronics 323
Western Electric 336
Westinghouse 337
Zenith Radio Corp (CRT's) 343
Nortn American Philips Corp 423
Taylor (aka Cetron-Taylor) 713
Lewis & Kaufman 738
National Electronics (also Cetron) 749
Penta Laboratories 771
Vacuum Tube Products 781
Varian Associates 809
Litton Industries 879
Electrons, Inc 935
Capacitors EIA code
Aerovox Corp 102
American Condensor 109
Centralab 134
Chicago Condensor 135
Aerovox Hi-Q Division 163
John E Fast 178
General Electric 188
Mallory 235
Micamold 240
Millen 242
Radio Condensor Company 273
Solar 296
Sprague 303
Gudeman 438
Good-All 446
Barker & Wiiliamson 461
Pyramid 472
United Condensor 516
Electrical Utilities Corp 569
Illinois Capacitor (Condensor) 616
American Radionic 648
Sangamo 658
Ajax 705
Standard Condensor 710
RMC (Radio Materials Corp) 732
Condensor Manufacturers 885
Transformers & Coils EIA code
Stancor (Chicago-Standard) 138
Coil Engineering 141
Ensign Coil 172
Freed 183
General Radio 194
Jefferson Electric 218
Thordarsen-Meissner 238
Merit Coil & Transformer 239
Standard Coil 305
Essex (Transformer Division) 352
New York Transformer 366
Altec Lansing-Peerless 391
Foster Transformer 394
General Transformer 412
United Transformer Corp (UTC) 418
Radio-Television Products Corp 489
Empire Coil 452
Caledonia 503
Triwec Transformer 524
Midwest Coil & Transformer 549
Standard Winding Co 550
F & V Coil Winding 572
Woodward-Schumacher 606
Central Coil 637
Electrical Windings 682
Grand Transformers 757
Forest Electric 773
Ogden Coil & Transformer 776
Triad 830
Better Coil & Transformer 831
Acro Products (Acrosound) 878
Mohawk 883
American Transformer 892
Tresco 897
Coilcraft 906
Aerocoil 908
Acme Coil & Transformer 928
Magnetic Coil Mfring 933
Northlake 1005
Pacific 1052
Resistor & Potentiometers EIA code
Allen-Bradley 106
Centralab 134
CTS (Chicago Telephone Supply) 137
Clarostat 140
Erie 173
IRC (International Resistance Co) 214
Mallory 235
Muter 244
Ohmite 251
Speer 300
Stackpole 304
Ward Leonard 532
Milwaukee Resistor 722
Dale 816
Atlas 932
Speakers (Drivers only, not cabinets) EIA Code
CTS (Chicago Telephone Supply) 137
Jensen 220
Magnavox 232
DuKane (Operadio Corp) 252
Quam (Quam-Nichols) 270
Rola 285
Utah 328
Western Electric 336
Altec Lansing Corp 391
North American Philips (Norelco) 423
Oxford 465
Waldom Electronics 555
Electro-Voice 649
Russell Speaker Co 748
Quincy Speaker Mfr Corp 767
Klipsch 843
University 847
Oaktron 934
Other commonly seen manufacturers
Company Product Code
Admiral Corp TV's, Radios 101
Alpha Wire 733
Amphenol Sockets, plugs 554
ATR Vibrators 551
Anaconda Wire 547
Arvin Sears radios & TV's 248
Astatic Phono cartridges 345
Belden Wire 579
Bell Amps 708
Bogen Amps 589
BIC British imports 409
Cannon Connectors 440
Cinch Sockets, connectors 139
Collins Radio gear 439
Connector Corp Sockets, connectors 888
Consolidated Wire 607
Crosley Radios 152
Drake RF gear 851
DuKane (Operadio) Amps 252
Eby Sockets 160
Empire Phono cartridges 452
Essex Wire 175
Gates RF gear 187
General Cement Adhesives, Testor's paint 396
General Radio Test Equip 194
Hallicrafters Ham & SW gear 199
Hammarlund Ham & SW gear 201
Harmon-Kardon Hi-fi gear 794
Hickok Test Equip 508
International Rectifier Semiconductors 845
Jackson Tube Testers 216
E F Johnson Sockets, ham xcvrs 222
Kester Solder 224
Keystone Hardware 699
Lenz Wire 228
Littelfuse Fuses 230
McIntosh Hifi gear 793
Methode Connectors 720
James Millen Sockets 242
Muntz Cheap TV's 772
National Co Ham & SW gear, hifi 245
Newcomb Amps 437
Packard Bell TV's radios computers 254
Philco Radios & TV's 260
Philmore Hardware 262
Pickering (Stanton) Phono cartridges 631
Pilot Hifi tuners & amps 264
Pioneer Cheap recievers 706
Precision (Grommes) Hifi & PA amps 871
Radio Craftsmen Hifi gear 275
J P Seeburg Jukeboxes 289
Shure Brothers Phono carts, mics 590
Mark Simpson (MASCO) PA Amps 295
Simpson Electric Meters 614
Sonotone Phono cartridges 787
Tetrad Phono cartridges 842
Triplett Test equipment 321
Wells-Gardner Monkey Wards radios 334
Weston Test Equipment 338
Zenith Radios & TV's 343
More speaker codes
Alphabetical:
1113 Acoustic Fiber Sounde 67 Eminence 706 Pioneer
101 Admiral 742 Esquire 1098 Pyle
391 Altec Lansing 1056 Fisher 270 Quam-Nichols
840 Ampex 188 General Electric 767 Quincy
795 Atlas 794 Harman Kardon 277 Radio Speaker
119 Automatic Manufacturing 416 Heath 280 Raytheon
24 Becker 575 Heppner 274 RCA
125 Bendix 169 Hitachi 285 ROLA
120 Hokutone
371 Best 220 Jensen 240 JW Davis
286 Ross 589 Bogen 232 Magnavox
748 Russell 719 Carbonneau 130 Matsushita
296 Solar 1059 Channel 789 McGregor
787 Sonatone 145 Cinaudagraph 1191 Micro Magnet
308 Stromberg 433 Cleveland 828 Midland
756 Universal 145 Consolidated 549 Midwest
847 University 150 Crescent 185 Motorola
328 Utah 137 C.T.S. 245 National
1279 WeberVST 1149 Curtis Mathes 918 Oaktron
336 Western Electric 466 Delco 252 Operadio
449 Wilder 252 Dukane 465 Oxford
343 Zenith 649 Electro-Voice 130 Panasonic
277 Emerson 260 Philco
Numerical:
24 Becker 277 Emerson 748 Russell
67 Eminence 280 Raytheon 756 Universal
101 Admiral 285 ROLA 767 Quincy
119 Automatic Manufacturing 286 Ross 787 Sonatone
120 Hokutone
125 Bendix 296 Solar 789 McGregor
130 Matsushita 308 Stromberg 794 Harman Kardon
130 Panasonic 328 Utah 795 Atlas
137 C.T.S. 336 Western Electric 828 Midland
145 Cinaudagraph 343 Zenith 840 Ampex
145 Consolidated 371 Best 847 University
150 Crescent 391 Altec Lansing 918 Oaktron
169 Hitachi 416 Heath 1056 Fisher
185 Motorola 433 Cleveland 1059 Channel
188 General Electric 449 Wilder 1098 Pyle
220 Jensen 465 Oxford 1113 Acoustic Fiber Sounde
232 Magnavox 466 Delco 1149 Curtis Mathes
240 JW Davis 549 Midwest 1191 Micro Magnet
245 National 575 Heppner 1279 WeberVST
252 Operadio 589 Bogen
252 Dukane 649 Electro-Voice
260 Philco 706 Pioneer
270 Quam-Nichols 719 Carbonneau
274 RCA 742 Esquire
277 Radio Speaker
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