Fender Tube amp codes: 1953-1970 - (look for a 2 letter code stamped on the tube chart inside the back of the amp)- the first letter is the year, and the second letter is the month.An amp stamped NA would have been made in Jan. Here is a list of the first letter showing the year of manufacture. Search by Serial Number Enter Serial Number. True 801340 TRANSFORMER, STEP DOWN 200VA/ 230VAC/VI/115VAC VO. True 801340 TRANSFORMER, STEP DOWN 200VA/ 230VAC/VI/115VAC VO. In Stock, ships today. View Full Details. List Price: $ 279.72. My Price: Add to cart. View Full Details. Sunbelt Transformer is one of the world’s largest providers of new and reconditioned transformers and electrical equipment for commercial and industrial markets worldwide. Our Company Sunbelt offers a complete line of transformers, components, switchgear and power products. Put here a software name you are looking serial numbers for, i.e windows xp or internet download manager and press search button then, please, don't add serial, keygen and so on to the search Pdf transformer, 100 records found.
- Wagner Transformer Serial Number Lookup
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These are codes often seen stamped on components found in US made vintagetube equipment. This list is circa 1955, and some codes have been reassigned or added since that time.
Code formats were not completely standardized, but a little decipheringwill generally yield the info of interest. Note that many makers also stampedOEM (Original Eqipment Manufacturer) part numbers above or below the EIAcode, in some cases parts makers or the customer elected not to includethe EIA codes, so not all parts have them.
They generally follow the following format: (example)
322 5904
where 322 is the manufacturer code (in this case Tungsol), 59 is theyear (1959), and 04 is the week.
One alternate scheme is:
274 940
274 is the EIA code (RCA) 9 is the last digit of the year (in this case1949). Usually single digit date codes are from the 1940's, but have on occasion shown up in later decades, even up to the 1970's. If one has a general idea of the age of the piece in question, usually the decade canbe divined from that.
Another alternate is in the format following:
188-5 69 32
188 is General Electric. 5 is the plant code (in this case, Owensboro,Kentucky). 69 32 is 1969, 32nd week.
And another is like this:
322 6104-1
322 is Tungsol, 6104 is 1961, 4th week, 1 is the shift code (1 wouldprobably be the day shift)
After about 1960, many tube manufacturers went to encrypted alphabeticaldate codes., such as:
KE
188-5
The reason was purportedly to allow factories to track the dates ofmanufacture of defective tubes (especially important in the case of OEM customers that might send back entire batches of tubes), but avoid possibleconsumer complaints about 'stale' tubes. This sounds perhaps a little sillysince the shelf life of tubes is decades, at least (indefinite in practicalterms), but some OEM's might have beenn a bit irritated by occasional consumer complaints such as 'my 1961 model TV has 1959 model tubes in it!'
Tubes made for the US military, or certain OEMs (such as some test equipmentmanufacturers) that requested it, continued to carry numerical date codes.
In years past, EIA (Electronic Industries Association) also went by the name of RETMA, and the original acronym of RMA (Radio Manufacturer'sAssociation).EIA Code Lists for:
Tubes
Wagner Transformer Serial Number Lookup
Capacitors
Transformers
Potentiometers (controls) & Resistors
Speakers
Other Manufacturers
| 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 |
Transformer Serial Number Database List
| 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 |
Transformer Serial Number Database Download
| 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 (Driversonly, 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 |
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