Schematics, Service manual or circuit diagram
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List of 201 American Transformer models
Model
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Year Book File Type Page Preview/Status
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American Transformer 1001932Gernsback3Radio665
666
667
American Transformer 100 schematic circuit diagram
American Transformer 1001933GernsbackACarRadio234American Transformer 100 schematic circuit diagram
American Transformer 100AR1934Rider5American Transformer1American Transformer 100AR schematic circuit diagram
American Transformer 1201391931Rider2American Transformer11American Transformer 120139 schematic circuit diagram
American Transformer 1201932Gernsback3Radio668American Transformer 120 schematic circuit diagram
American Transformer 160 ;AC1934Gernsback5Radio870American Transformer 160 ;AC schematic circuit diagram
American Transformer 160 ;AVC1931Gernsback2Radio182JAmerican Transformer 160 ;AVC schematic circuit diagram
American Transformer 2001932Rider3American Transformer3American Transformer 200 schematic circuit diagram
American Transformer 200 ;Series Short Wave1931Gernsback2Radio468A_468GAmerican Transformer 200 ;Series Short Wave schematic circuit diagram
American Transformer 210 ;Power Amp1930Rider1American Transformer1American Transformer 210 ;Power Amp schematic circuit diagram
American Transformer 21 D ;High Power Box1930Gernsback1Amplifier342American Transformer 21 D ;High Power Box schematic circuit diagram
American Transformer 2201931Gernsback2Radio468H_468PAmerican Transformer 220 schematic circuit diagram
American Transformer 240 ;AC1934Gernsback5Radio871American Transformer 240 ;AC schematic circuit diagram
American Transformer 2411934Rider5American Transformer2American Transformer 241 schematic circuit diagram
American Transformer 250 ;Power Amp1930Rider1American Transformer2American Transformer 250 ;Power Amp schematic circuit diagram
American Transformer 251601932Rider3American Transformer1American Transformer 25160 schematic circuit diagram
American Transformer “25-160”1934Gernsback5Radio870American Transformer “25-160” schematic circuit diagram
American Transformer 252201932Rider3American Transformer5American Transformer 25220 schematic circuit diagram
American Transformer “25-240”1934Gernsback5Radio871American Transformer “25-240” schematic circuit diagram
American Transformer “25-260”1932Gernsback3Radio669American Transformer “25-260” schematic circuit diagram
American Transformer 252601934Rider4American Transformer2American Transformer 25260 schematic circuit diagram
American Transformer 252801932Rider3American Transformer8American Transformer 25280 schematic circuit diagram
American Transformer “25-280”1934Gernsback5Radio872American Transformer “25-280” schematic circuit diagram
American Transformer 25401930Rider1American Transformer5American Transformer 2540 schematic circuit diagram
American Transformer “25-51”1930Gernsback1Radio328American Transformer “25-51” schematic circuit diagram
American Transformer “25-53”1930Gernsback1Radio328American Transformer “25-53” schematic circuit diagram
American Transformer “25-55”1930Gernsback1Radio328American Transformer “25-55” schematic circuit diagram
American Transformer 25611930Rider1American Transformer7American Transformer 2561 schematic circuit diagram
American Transformer “25-90”1930Gernsback1Radio328AAmerican Transformer “25-90” schematic circuit diagram
American Transformer “25-91”1930Gernsback1Radio328AAmerican Transformer “25-91” schematic circuit diagram
American Transformer “25-94”1931Gernsback2Radio458
459
American Transformer “25-94” schematic circuit diagram
American Transformer 25941931Rider2American Transformer5American Transformer 2594 schematic circuit diagram
American Transformer 25A1930Gernsback1Amplifier334AAmerican Transformer 25A schematic circuit diagram
American Transformer 25A ;Power Amp1930Rider1American Transformer1American Transformer 25A ;Power Amp schematic circuit diagram
American Transformer 2601932Gernsback3Radio669
670
672
American Transformer 260 schematic circuit diagram
American Transformer 2801932Gernsback3Radio674American Transformer 280 schematic circuit diagram
American Transformer 280 ;AC1934Gernsback5Radio871American Transformer 280 ;AC schematic circuit diagram
American Transformer 2 AP1930Gernsback1Amplifier342American Transformer 2 AP schematic circuit diagram
American Transformer 3001933Gernsback4Radio268
269
American Transformer 300 schematic circuit diagram
American Transformer 3201933Gernsback4Radio270American Transformer 320 schematic circuit diagram
American Transformer 3401933Gernsback4Radio271
272
American Transformer 340 schematic circuit diagram
American Transformer 3601933Gernsback4Radio273American Transformer 360 schematic circuit diagram
American Transformer 3601934Rider5American Transformer3American Transformer 360 schematic circuit diagram
American Transformer 400;AC/DC1934Gernsback5Radio866American Transformer 400;AC/DC schematic circuit diagram
American Transformer 401930Rider1American Transformer1American Transformer 40 schematic circuit diagram
American Transformer 401931Gernsback2Radio456
457
463
329(V3)
American Transformer 40 schematic circuit diagram
American Transformer 4221934Rider4American Transformer7American Transformer 422 schematic circuit diagram
American Transformer 422;AC/DC1934Gernsback5Radio867American Transformer 422;AC/DC schematic circuit diagram
American Transformer 4231934Rider4American Transformer7American Transformer 423 schematic circuit diagram
American Transformer 423;AC/DC1934Gernsback5Radio867American Transformer 423;AC/DC schematic circuit diagram
American Transformer 4251934Rider4American Transformer8American Transformer 425 schematic circuit diagram
American Transformer 4401934Rider4American Transformer9American Transformer 440 schematic circuit diagram
American Transformer 4501934Rider4American Transformer10American Transformer 450 schematic circuit diagram
American Transformer 4701934Gernsback5Radio868American Transformer 470 schematic circuit diagram
American Transformer 4701934Rider4American Transformer11American Transformer 470 schematic circuit diagram
American Transformer 4721934Rider4American Transformer11American Transformer 472 schematic circuit diagram
American Transformer 472 ;Same as 4701934Gernsback5Radio868American Transformer 472 ;Same as 470 schematic circuit diagram
American Transformer 4801926Beitman1926transf.c.ofa203American Transformer 480 schematic circuit diagram
American Transformer 4801934Gernsback5Radio869American Transformer 480 schematic circuit diagram
American Transformer 4801934Rider4American Transformer12American Transformer 480 schematic circuit diagram
American Transformer 4901934Rider5American Transformer4American Transformer 490 schematic circuit diagram
American Transformer 5001934Rider5American Transformer5American Transformer 500 schematic circuit diagram
American Transformer 511926Beitman1926transf.c.ofa202American Transformer 51 schematic circuit diagram
American Transformer 511930Gernsback1Radio328American Transformer 51 schematic circuit diagram
American Transformer 51 ;AC1930Rider1American Transformer3American Transformer 51 ;AC schematic circuit diagram
American Transformer 531926Beitman1926transf.c.ofa202American Transformer 53 schematic circuit diagram
American Transformer 531930Gernsback1Radio328American Transformer 53 schematic circuit diagram
American Transformer 53 ;AC1930Rider1American Transformer3American Transformer 53 ;AC schematic circuit diagram
American Transformer 551926Beitman1926transf.c.ofa202American Transformer 55 schematic circuit diagram
American Transformer 551930Gernsback1Radio328American Transformer 55 schematic circuit diagram
American Transformer 55 ;AC1930Rider1American Transformer3American Transformer 55 ;AC schematic circuit diagram
American Transformer 601930Gernsback1Radio355American Transformer 60 schematic circuit diagram
American Transformer 611931Gernsback2Radio460
462
American Transformer 61 schematic circuit diagram
American Transformer 701931Gernsback2Radio460
461
462
American Transformer 70 schematic circuit diagram
American Transformer 801931Gernsback2Radio465American Transformer 80 schematic circuit diagram
American Transformer 831931Gernsback2Radio466American Transformer 83 schematic circuit diagram
American Transformer 841932Gernsback3Radio662
663
664
American Transformer 84 schematic circuit diagram
American Transformer 851932Gernsback3Radio662
663
664
American Transformer 85 schematic circuit diagram
American Transformer 901930Gernsback1Radio328A
464(V2)
American Transformer 90 schematic circuit diagram
American Transformer 911930Gernsback1Radio328AAmerican Transformer 91 schematic circuit diagram
American Transformer 91A1930Gernsback1Radio328AAmerican Transformer 91A schematic circuit diagram
American Transformer 921931Gernsback2Radio467American Transformer 92 schematic circuit diagram
American Transformer 941931Gernsback2Radio458
459
American Transformer 94 schematic circuit diagram
American Transformer A601936Gernsback7Radio580American Transformer A60 schematic circuit diagram
American Transformer A B C Power Unit1930Gernsback1Amplifier26American Transformer A B C Power Unit schematic circuit diagram
American Transformer AC1001931Rider2American Transformer7American Transformer AC100 schematic circuit diagram
American Transformer AC1601932Rider3American Transformer1American Transformer AC160 schematic circuit diagram
American Transformer AC2201932Rider3American Transformer5American Transformer AC220 schematic circuit diagram
American Transformer AC2401931Rider2American Transformer12American Transformer AC240 schematic circuit diagram
American Transformer AC2401934Rider4American Transformer1American Transformer AC240 schematic circuit diagram
American Transformer AC2601934Rider4American Transformer2American Transformer AC260 schematic circuit diagram
American Transformer AC2801932Rider3American Transformer8American Transformer AC280 schematic circuit diagram
American Transformer AC3001934Rider4American Transformer4American Transformer AC300 schematic circuit diagram
American Transformer AC3201934Rider4American Transformer5American Transformer AC320 schematic circuit diagram
American Transformer AC3401934Rider4American Transformer6American Transformer AC340 schematic circuit diagram
American Transformer AC4201932Rider3American Transformer10American Transformer AC420 schematic circuit diagram
American Transformer AC601930Rider1American Transformer5American Transformer AC60 schematic circuit diagram
American Transformer AC611930Rider1American Transformer7American Transformer AC61 schematic circuit diagram
American Transformer AC701930Rider1American Transformer7American Transformer AC70 schematic circuit diagram
American Transformer AC801930Rider1American Transformer10American Transformer AC80 schematic circuit diagram
American Transformer AC811930Rider1American Transformer10American Transformer AC81 schematic circuit diagram
American Transformer AC901930Rider1American Transformer10American Transformer AC90 schematic circuit diagram
American Transformer AC90A1930Rider1American Transformer10American Transformer AC90A schematic circuit diagram
American Transformer AC911930Rider1American Transformer10American Transformer AC91 schematic circuit diagram
American Transformer AC941931Rider2American Transformer2
5
American Transformer AC94 schematic circuit diagram
American Transformer AC951931Rider2American Transformer2American Transformer AC95 schematic circuit diagram
American Transformer AM201936Gernsback7Radio580American Transformer AM20 schematic circuit diagram
American Transformer Ameritran ;Power Unit1930Rider1American Transformer1American Transformer Ameritran ;Power Unit schematic circuit diagram
American Transformer Approved Audio Circuits1930Gernsback1Amplifier334AAmerican Transformer Approved Audio Circuits schematic circuit diagram
American Transformer C101936Rider7American Transformer1American Transformer C10 schematic circuit diagram
American Transformer C161936Rider7American Transformer2American Transformer C16 schematic circuit diagram
American Transformer C171936Rider7American Transformer2American Transformer C17 schematic circuit diagram
American Transformer C211936Rider7American Transformer3American Transformer C21 schematic circuit diagram
American Transformer C271936Rider7American Transformer3American Transformer C27 schematic circuit diagram
American Transformer C331936Rider7American Transformer4American Transformer C33 schematic circuit diagram
American Transformer Clarion ;TC-11936Gernsback7Radio118American Transformer Clarion ;TC-1 schematic circuit diagram
American Transformer DeLuxe Recording Amplifier1931Gernsback2Amplifier143American Transformer DeLuxe Recording Amplifier schematic circuit diagram
American Transformer Hum Reduction Chart1931Gernsback2Misc.145American Transformer Hum Reduction Chart schematic circuit diagram
American Transformer PA Unit ;Power Supply1930Rider1American Transformer1American Transformer PA Unit  ;Power Supply schematic circuit diagram
American Transformer PF 2501930Gernsback1Amplifier334American Transformer PF 250 schematic circuit diagram
American Transformer PF 2811931Gernsback2Amplifier144American Transformer PF 281 schematic circuit diagram
American Transformer PF 524A1931Gernsback2Amplifier145American Transformer PF 524A schematic circuit diagram
American Transformer Pickup Matching Circuit1931Gernsback2Misc.143American Transformer Pickup Matching Circuit schematic circuit diagram
American Transformer Plate Supply Transformer Connection1930Gernsback1Misc.334BAmerican Transformer Plate Supply Transformer Connection schematic circuit diagram
American Transformer PP 2501931Gernsback2Amplifier144American Transformer PP 250 schematic circuit diagram
American Transformer P Unit1930Rider1American Transformer1American Transformer P Unit schematic circuit diagram
American Transformer TC-101935Gernsback6Radio1052American Transformer TC-10 schematic circuit diagram
American Transformer TC-11935Gernsback6Radio1050American Transformer TC-1 schematic circuit diagram
American Transformer TC11938Rider9American Transformer1American Transformer TC1 schematic circuit diagram
American Transformer TC-1 Clarion1936Gernsback7Radio118American Transformer TC-1 Clarion schematic circuit diagram
American Transformer TC201934Rider5American Transformer7American Transformer TC20 schematic circuit diagram
American Transformer TC-201935Gernsback6Radio1053American Transformer TC-20 schematic circuit diagram
American Transformer TC211934Rider5American Transformer7American Transformer TC21 schematic circuit diagram
American Transformer TC-211935Gernsback6Radio1053American Transformer TC-21 schematic circuit diagram
American Transformer TC-21935Gernsback6Radio1050American Transformer TC-2 schematic circuit diagram
American Transformer TC21938Rider9American Transformer1American Transformer TC2 schematic circuit diagram
American Transformer TC-221935Gernsback6Radio1054American Transformer TC-22 schematic circuit diagram
American Transformer TC221938Rider9American Transformer3American Transformer TC22 schematic circuit diagram
American Transformer TC-231935Gernsback6Radio1054American Transformer TC-23 schematic circuit diagram
American Transformer TC231938Rider9American Transformer3American Transformer TC23 schematic circuit diagram
American Transformer TC-241935Gernsback6Radio1054American Transformer TC-24 schematic circuit diagram
American Transformer TC-251935Gernsback6Radio1054American Transformer TC-25 schematic circuit diagram
American Transformer TC-261935Gernsback6Radio1054American Transformer TC-26 schematic circuit diagram
American Transformer TC-271935Gernsback6Radio1054American Transformer TC-27 schematic circuit diagram
American Transformer TC-281935Gernsback6Radio1055American Transformer TC-28 schematic circuit diagram
American Transformer TC281937Rider8American Transformer2American Transformer TC28 schematic circuit diagram
American Transformer TC-291935Gernsback6Radio1055American Transformer TC-29 schematic circuit diagram
American Transformer TC291937Rider8American Transformer2American Transformer TC29 schematic circuit diagram
American Transformer TC301934Rider5American Transformer6American Transformer TC30 schematic circuit diagram
American Transformer TC-301936Gernsback7Radio579American Transformer TC-30 schematic circuit diagram
American Transformer TC-311935Gernsback6Radio1056American Transformer TC-31 schematic circuit diagram
American Transformer TC311939Rider10American Transformer1American Transformer TC31 schematic circuit diagram
American Transformer TC-35A1935Gernsback6Radio1057American Transformer TC-35A schematic circuit diagram
American Transformer TC35A1939Rider10American Transformer2American Transformer TC35A schematic circuit diagram
American Transformer TC-35LW1935Gernsback6Radio1057American Transformer TC-35LW schematic circuit diagram
American Transformer TC35LW1939Rider10American Transformer2American Transformer TC35LW schematic circuit diagram
American Transformer TC-361935Gernsback6Radio1058American Transformer TC-36 schematic circuit diagram
American Transformer TC361939Rider10American Transformer4American Transformer TC36 schematic circuit diagram
American Transformer TC-36A1935Gernsback6Radio1059American Transformer TC-36A schematic circuit diagram
American Transformer TC36A1938Rider9American Transformer4American Transformer TC36A schematic circuit diagram
American Transformer TC-36LW1935Gernsback6Radio1059American Transformer TC-36LW schematic circuit diagram
American Transformer TC36LW1938Rider9American Transformer4American Transformer TC36LW schematic circuit diagram
American Transformer TC-371935Gernsback6Radio1060American Transformer TC-37 schematic circuit diagram
American Transformer TC371938Rider9American Transformer5American Transformer TC37 schematic circuit diagram
American Transformer TC-37A1935Gernsback6Radio1061American Transformer TC-37A schematic circuit diagram
American Transformer TC37A1939Rider10American Transformer5American Transformer TC37A schematic circuit diagram
American Transformer TC-37LW1935Gernsback6Radio1061American Transformer TC-37LW schematic circuit diagram
American Transformer TC37LW1939Rider10American Transformer5American Transformer TC37LW schematic circuit diagram
American Transformer TC-381935Gernsback6Radio1062American Transformer TC-38 schematic circuit diagram
American Transformer TC381938Rider9American Transformer6American Transformer TC38 schematic circuit diagram
American Transformer TC-391935Gernsback6Radio1063American Transformer TC-39 schematic circuit diagram
American Transformer TC391937Rider8American Transformer7American Transformer TC39 schematic circuit diagram
American Transformer TC-39A1935Gernsback6Radio1054American Transformer TC-39A schematic circuit diagram
American Transformer TC39A1938Rider9American Transformer7American Transformer TC39A schematic circuit diagram
American Transformer TC-39LW1935Gernsback6Radio1054American Transformer TC-39LW schematic circuit diagram
American Transformer TC39LW1938Rider9American Transformer7American Transformer TC39LW schematic circuit diagram
American Transformer TC401934Rider5American Transformer9American Transformer TC40 schematic circuit diagram
American Transformer TC-421935Gernsback6Radio1064American Transformer TC-42 schematic circuit diagram
American Transformer TC421937Rider8American Transformer4American Transformer TC42 schematic circuit diagram
American Transformer TC-431935Gernsback6Radio1064American Transformer TC-43 schematic circuit diagram
American Transformer TC431937Rider8American Transformer4American Transformer TC43 schematic circuit diagram
American Transformer TC-441935Gernsback6Radio1064American Transformer TC-44 schematic circuit diagram
American Transformer TC441937Rider8American Transformer4American Transformer TC44 schematic circuit diagram
American Transformer TC501934Rider5American Transformer10American Transformer TC50 schematic circuit diagram
American Transformer TC-501936Gernsback7Radio580American Transformer TC-50 schematic circuit diagram
American Transformer TC521934Rider5American Transformer9American Transformer TC52 schematic circuit diagram
American Transformer TC52A1938Rider9American Transformer8American Transformer TC52A schematic circuit diagram
American Transformer TC-531936Gernsback7Radio579American Transformer TC-53 schematic circuit diagram
American Transformer TC-53A1935Gernsback6Radio1065American Transformer TC-53A schematic circuit diagram
American Transformer TC601934Rider5American Transformer11American Transformer TC60 schematic circuit diagram
American Transformer TC-601935Gernsback6Radio1066American Transformer TC-60 schematic circuit diagram
American Transformer TC-61935Gernsback6Radio1051American Transformer TC-6 schematic circuit diagram
American Transformer TC61937Rider8American Transformer1
3
American Transformer TC6 schematic circuit diagram
American Transformer TC-651935Gernsback6Radio1067American Transformer TC-65 schematic circuit diagram
American Transformer TC651937Rider8American Transformer4
6
American Transformer TC65 schematic circuit diagram
American Transformer TC-661935Gernsback6Radio1068American Transformer TC-66 schematic circuit diagram
American Transformer TC661939Rider10American Transformer6American Transformer TC66 schematic circuit diagram
American Transformer TC-751935Gernsback6Radio1069American Transformer TC-75 schematic circuit diagram
American Transformer TC751939Rider10American Transformer6American Transformer TC75 schematic circuit diagram
American Transformer TC-761935Gernsback6Radio1069American Transformer TC-76 schematic circuit diagram
American Transformer TC761939Rider10American Transformer6American Transformer TC76 schematic circuit diagram

These radio, TV, record player and tape or cassette recorder schematics,circuit diagrams and service manuals are mostly high quality, very readable scans and will usually be Emailed within an hour or two, if I need to scan an item, or it's the middle of the night here (it is 08:59 in the UK) it may take a little longer! Specialising in British schematics Roberts, Hacker, Bush etc. also American and German manuals feature strongly, search for what you need. Multi page manuals are Emailed as pdfs. Please Email if you have any queries, or you require any vintage parts for your repair I'll let you know what I have! Thanks for looking, Mike.
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90V/1.4V Battery Eliminator

90V/1.4V battery eliminators available at £29

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Fill in the "Make" and "Model" boxes, if you are unsure of the model, leave it blank and I will list ALL models for that manufacturer, similarly if you only have the model number leave "Make" blank and I will list similar model names from ALL manufacturers.
More explanation here. Some sources searched :-
J.F. Rider's Perpetual Rider 1920-54
Trader Service sheets Trader 1933-69
M.N. Beitman Radio Diags Beitman 1926-69
Radio and TV Servicing RTV 1945-86
Radio and TV 5 vols RTV5 1945-54
Gernsback Radio Diags. Gernsback 1922-34
Crosley Service Suppls. Crosley 1929-42
Empfanger Schaltungen ES 1928-57
Broadcaster Supplements Broadcaster1934-42
My Pre-scanned Files File
The search logic is slightly "fuzzy" in that it's case insensitive and ignores punctuation so, model TR-510 is the same as tr510, and G.E.C is the same as "gec".

(181152 schematics* by 1673 different manufacturers indexed!)
Updated 28th. Sep 2020


Some free books and stuff you might find helpful in repairing your radio.

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