Transformer date codes. S/N 3693732379 (Salinas, CA, 1979) Reply reply .

Transformer date codes Hammond places a time stamp on their transformers at the time of manufacturing and CCFL Transformers Power Factor Transformers Configurable Transformers Coilcraft reel labels contain a manufacturing date code embedded in the first six characters of the "LOT CODE" field. Choke. NOTE: The Date Code will read something like these examples below: 095231 (09=year, 52=week of the year, 3=day of week and 1=shift) 171022 (17=year, 10=week of the year, 2=day of week and 2=shift) For Older QO and Homeline load centers BEFORE the year 2000, the date code will read differently. Mar. Because line voltage is commonly at 120V or higher, expect the filament winding to produce more than 6. In general, Fender amps that don’t have rubber-stamped tube sticker date codes have EIA numbers on their transformers that might enable determination of the production date. Hoffman Amplifiers Tube Amp Forum, 1960's Fender Transformer codes. Does anyone have a clue on decoding these? Share Reply Quote. Westinghouse became Westinghouse-ABB in 1989. IMPORTANT: Always obtain the date code when investigating a complaint on any device. Dec 12, 2016 #2. They range from the fairly simple through the horribly convoluted to the just plain vague. This is a family-friendly community for all things Transformers -- mostly the toys, but also the cartoons, movies, and comics. Has replacement Jensen C12Q speakers, 3 prong grounding, and a cap jobbut otherwise is original. TRANSFORMER DATE CODES: Another way to get a close estimate of when your amp was made is to read the codes on the transformers. Why? What difference would that make? And a photo of the toy with a hand written reference number. Learn how to find out when your vintage Fender was manufactured by reading the tube chart and transformer date codes. Languages: English | Version: R06/19 Document Number: 0110PD9201. g. Pieces start with 606 (Schumacher's EIA number), then the date code (YWEEK e. RS Spares. Rating: (1) Hello dear humans, I have a question related to a certain tool in siemens that I do not know the name of. 1 1. 3 2 6 X 4 H 1 Day of the Month 01-31 The Months 1:Jan 2:Feb 3:Mar 4:April 5:May 6:June 7:July 8:Aug 9:Sept X:Oct Y:Nov Z:Dec The %PDF-1. The first of the three digits tells us the last digit of OH: Transformers Determining the Date of Manufacture From Serial Numbers of Distribution Transformers 013244 Page 2 of 25 Rev. June July Oct. . Is this really necessary? - Photo of the Transformer with your reference Got a new amp today! 1966 Fender Pro Reverb. 921 = 1959 21st week) PT #6206 OT #6107 #6217. Eventually, the hope is to have enough info for a more detailed breakdown on the B series, A+6 digit and F+6 digit series. NOTE: Don't confuse these with the *RCA* 2-letter date codes. In 1960s Britain, electrical component manufacturers almost without fail printed the date of manufacture The Matsuo date code is explained in more detail in their other datasheets, such as p. #06: 07−01−14 ABB Notes 1. The ‘C’ beside the square mark (Pb-Free mark) denotes the use of copper wire. Date code example: GFBW Date code example: FAJW: Enter the 4 Pot, capacitor, speaker, and transformer date codes are unreliable because they are all replaceable parts that can fail, as opposed to chassis - which don't fail. 3V -- maybe as high as 6. 64-65. File Name: 0110PD9201. They used a code like this: 606 – 645 The date is in the last three digits, after the 606 – . In some cases, this system is still used today. 3. hi just wondering where the product date code is or what it is on the Buzzworthy Bumblebee Studio series 44 Optimus prime leader class. When the tube chart or two letter code is missing, it is possible to date Fender amps by looking at RS Spares or Drake transformer used in the JTM-45 (the Drake rated at 8000 ohms) Use the model codes and date codes below to determine the model and age of your amp. You must guess at the 6 in context as it is the last digit of the year: 1956, 1966, 1976? 23 is the week, in this case June of whatever year ends in "6". Product date code . The date code system shown below was implemented the first week of August, 1996 (beginning with 06341). If you have a serious interest in learning about the history of Fender amplifiers, or if you just want to try to establish the year of 1956–1995 Date Code System. So if any of you guys have a 1959 - 1960 5 watt single-ended In almost every Fender amplifier there are several EIA (manufacturer) codes followed by a date code, typically found on the speaker(s), transformer(s), tubes, caps, and occasionally pots. Yes, they are still in business 35 years after yours were built. slider313 said: Amp chassis' were not picked in numerical order and W Z ] o ] > u } í õ í ó rW v : E & D Z WZ D z :hE :h> h' ^ W K d EKs í õ ò ð Ê Ê Ê Ê Ê Ê The output transformer date code indicates it could have been shared with another amp in the late ’50s. Discussion in 'Transformers Toy Discussion' started by Cornchips1234, Jul 31, 2021. 4. Most post tweed Fenders had ALL other Fender Amplifiers can be dated by the components inside: In almost every Fender amplifier there are several EIA (manufacturer) codes followed by a date code, How do you interpret the date code of a LV transformer? The first two digits of the date code indicates the YEAR the transformer was manufactured. The date code is "JT" = September 1962. For Example, the GE Dryer with SN: LR821547C was Manufactured in 2020, June. dddddddddddd dddddddddddd The transformers were specially made for JMI and do not figure in amps made by other makers. These TRANSFORMER DATE CODES: Another way to get a close estimate of when your amp was made is to read the codes on the transformers. The transformers have various date codes ranging from 2nd to 12th week of 1963. The EIA code will consist of 3 numbers followed by a date code of 3 or 4 numbers designating the year and the week. ) One very interesting and very important factoid has surfaced regarding the date code letters on the tube chart. Where exactly is the “date code of product” and “vendor code” located I am trying to make a quiry on hasbro support and I need this info Hasbro has provided the following info but it is useless to me DATE CODES ON TRANSFORMERS The power transformer inside Fender amps can also be used to date the model. Our Buyer’s guide to vintage Fender amps explains in detail how you can date your amp by looking at serial numbers, tube charts, transformer codes, speaker codes, Fender logo, etc. Date: Jul 31 2019 | Type: Data Bulletin. • Alternately, there are several lesser-used methods for indicating date codes. But I wanted to see 'em in a table. Anything to keep the date of manufacture from Click the link above for Tube amp info, Schematics, Board building information, Projects, Mods, Transformer diagrams, Photo's, Sound clips. Also keep in mind that transformers were often bought in large quantities, and they Because this is an older transformer -- date code 616 suggests made 16th week of 1966, it may have been wound for 110, 115, or 117V on the primary. For speakers this code can be 5, 6, 7 or 8 digits long, EIA has developed and issued Standard EIA-476-A on Source and Date Code Marking. Please see the detailed explanation and examples provided below. If one has a general idea of the age of the piece in question, usually Merit Coil & Transformer 239 Standard Coil 305 Essex (Transformer Division) 352 New York Transformer 366 Altec Lansing-Peerless 391 Foster Transformer 394 Well, actually the 362. A It's called the "source-date code", and it can help determine the approximate age of an electric instrument by the date its components were manufactured. The only exception was high-volume QO™ circuit breakers. This is for the grey/red stamped units like the HA-100X A few examples are BY18 and CU18. UTC Transformer Date Codes. Transformers & Coil Codes: 138 = Stancor (Chicago-Standard) 141 = Coil Engineering 172 = Ensign Coil 183 = Freed 194 = General Radio Omron Date Codes • The vast majority of Omron ECB products use the date code as shown in Method A (next slide). Nov. Power Transformer. 1 6. 3) Date code letters on the tube chart 4) Speaker codes and model (if speaker is original) 5) Transformer codes (if the amp doesn't have date codes on the tube chart) 6) Cosmetic features (flat/raised logo, tweed/tolex, blackface/silverface, rough/ smooth blond tolex, white/skirted knobs, TV-front/wide-panel, etc. 5 digit date code printed on the figure and the vendor code. : GUD24ESSMWW with SN: RL059433C was Manufactured in August 2018 (F20-014). Home This is a family-friendly community for all things Transformers -- mostly the toys, but also the cartoons, movies, and comics. 6± 0. The fourth digit is the year of manufacture and the last two numbers will be the week of manufacture. So if any of you guys have a 1959 - 1960 5 watt single-ended output transformer for a fender tweed you want to part with, let me know. 1202-324 . No longer will you need to fiddle with PDF documents containing scanned images of Google for "EIA Transformer Code". 1981 Source Code and Date Code. Some of the older amps have an inspection sticker on the top of the chassis and they usually have the day, month and year the amp was made or inspected. “Date code of product: The rest of the date codes on the amp are in the last few weeks of 1959, although the speaker is dated 1957. Dots, dashes, odd symbols, letter and number conbinations that change around every now and then, all sorts. Please visit my Tube Amplifier Forum Here's the place you can go to ask tube amplifier questions. Year. Dec. Join Nicholas Grabien on Patreon to get access to this post and more benefits. 2001 EIA Source and Date Code Book In addition, Excel documents of the codes are also July of 1969 Marshall introduced the date coding system. The upper line of numbers is the Hammond part no. Home; Help; Search One thing I omitted to state that it is a 5G13 tube chart with a date stamp of JA, so that makes its a Jan. Note: "A" Date Code: The "A" Date Code ran for 18 months (July 1969 - December 1970) so the "B" Code was not used. Fender Amp Date Codes: 1951-1967; Common Transformer Source Codes; Code Manufacturer; 606: Schumacher: 830: Triad: How the Source-Date Code Works. A hypothetical example Of the application of the ETA date code to the source code fol lows REF: EIA 476-A "Source And Date Code Marking" REF: EIA 476-B "Date Code Marking" Ed . In the The information provided in this document contains general descriptions, technical characteristics and/or recommendations related to products/solutions. For Technics / Panasonic ICs of the 1970a date codes probably take the form a single number then in smaller script an underlined HEX digit. The code follows the format: XXXYY ZZ where: XXX = a two or three (possibly four on newer amps) digit number indicating the manufacturer. com. So in todays world it would be putting out a few more volts than the schem is showing. The next two digits The rest of the date codes on the amp are in the last few weeks of 1959, although the speaker is dated 1957. Posts: 58. How the Source-Date Code Works. The Code on the tube chart of your Fender Amp is made up of two letters. : meets final rule u. This Standard outlines requirements for source and date code marking on electronic components and describes the assignment of co mponent manufacturer identification numbers and their sequence on the component to be marked, along with the lot date code. R = year date code, 1990 B = year date code, 2000 D = 2002 Feb. Westinghouse-ABB became ABB in 1990. 1999 EIA Source and Date Code Book. 4) Production number on the tube chart . my girlfriends ended up braking and sending a email to Date code on Schumacher/Fender Transformer Post by jborders5 » Mon Dec 30, 2013 6:29 pm I just found this old Fender output transformer that has been stored in one of my parts bins for a number of years. e. s. Please login or register. 1994 Source and Date Code. The First letter equates to the Year and the Second letter to the Month. 1996 Source and Date Code (2 nd Edition) 1997 Source and Date Code. Bell Cover : 80. Speaker has HiWatt Legend Series sticker on it, and Fane Acoustics cast in on the The date codes can be found in the following areas of the equipment: QO and Homeline Circuit Breakers (arc and ground-fault only): stamped on device near handle (see page 1) Standard QO and Homeline use the two-letter date code, stamped on the manifest label distribution transformer, dry type kva : phase : date code : freq. Reissue amps also use stamped Date Codes. 33±0 . For speakers this code can be 5, 6, 7 or 8 digits long, and it's ink-stamped or paint-stamped on the EIA Source-Date Codes: Electronic components such as transformers, potentiometers, speakers, and some capacitors are often stampted with a date code indicating who manufactured them and when. In a BF Vibrolux Reverbs you could have either Jensen, CTS or Oxford, the BF Super Reverbs had Jensen, This document provides information about the Pre-1950, 1950-1955, and 1956-Present Date Code Systems. The date is in MMDDYY format. Date Codes for Bourns Transformers 4-Digit Date Code. It has the codes L022764 606-702? Thanks folks. The date code is placed separately or hand-stamped directly onto the device, and should not be confused with label numbers or other identifying information. - First two digits indicate year of manufacture; - Last two digits indicate week of manufacture Example: 2110 = Manufactured in 2021, week 10 For Model Series: 2-, 3-, 4-, DLxxxx, LMxxxxx, SMxxxxx, It would be more accurately described as a date-code system, since each panel box does not have a unique number. 3 %âãÏÓ 21 0 obj /Linearized 1 /O 23 /H [ 940 310 ] /L 93559 /E 77385 /N 5 /T 93021 >> endobj xref 21 25 0000000016 00000 n 0000000847 00000 n 0000001250 00000 n 0000001404 00000 n 0000001588 00000 n 0000001813 00000 n 0000002033 00000 n 0000002261 00000 n 0000002489 00000 n 0000003061 00000 n 0000003339 00000 n 0000003378 00000 n 3) Date code letters on the tube chart . The data on this page reflects the approximate year that these transformers were used and not the actual dates of manufacture of the transformer or amplifier. For Example, the GE Stackable washer and Dryer Model No. - First two digits indicate year of manufacture; - Last two digits indicate week of manufacture Example: 0810 = Manufactured in 2008, week 10 For Model Series: 2-, 3-, 4-, DLxxxx, LMxxxxx, SMxxxxx, In almost every Fender amplifier there are several EIA (manufacturer) codes followed by a date code, typically found on the speaker(s), transformer(s), tubes, caps, and occasionally pots. pdf Related products To Determine Manufacture Date Based on Serial Number: The 1st three numbers of your serial number will always provide your manufacture date. NOTE: If the transformer has been replaced it will not represent the actual year the amp was built (the transformer needs to be original to use this system). 62-65. May CATALOG STOCK PRODUCTS: 10/20/11 Page 1 of 1 SMKFR-770-01 Rev. This is the EIA date code for Schumacher transformers. The 705number is probably the part number. Top. 10 cfr 431 apr 2013 efficiency : ins class : encl : type : ins sys : % iz : weight : lbs. On the other side of the chassis, the output transformer’s code (GA-9 EIA Production Source Codes – 1962. The South Boston, Virginia plant uses the shop order numbers as the serial numbers (e. Output Transformer. I am having a hard time trying to decode the 4 digit date code, with Letter Letter # # format. made in usa pri ( ) volts : sec ( ) volts : pri ( ) amps : power transformer tap positions tap volts 1 505 not for use on combustible floors ex75t3hoc eav8550503 The easiest method for this era is just use the transformer date codes. ie 9 plus small underlined D would mean 1979 14/16 ths into the the date code and lot code. 1998 Source and Date Code. -User Name -Password. The numbers after the 606 will be the year and week of manufacture, usually in the 70s it should be YYWW but may also just be YWW format and missing manufactured date code chart year jan feb mar apr may jun jul aug sep oct nov dec 1966 ar br cr dr er fr gr hr jr kr lr mr 1967 as bs cs ds es fs gs hs js ks ls ms 1968 at bt ct dt et ft gt ht jt kt lt mt 1969 au bu cu du eu fu gu hu ju ku lu mu created date: 3/26/2021 12:25:09 pm The codes on the CTS pots are a great way as is the transformer number. This can be done by adding, fol— lowing a hyphen , the last two digits of the production year plus the number of the week of that year. You will need to get the date codes from the speaker frames, the potentiometer date codes, the transformer codes and as much other detailed information you can about the specs and features of your amp. Sept. 1995 Source and Date Code. , NAV1921). Transformer date codes check out. Look for a number starting with 606- on either the PT, OT, or choke. Perhaps someone there could help you. 1960. 28th June 2020 Over the last 2 years I've been digitizing and compiling as many EIA Production Source Date Code lists as I could scrounge together into a massive, searchable spreadsheet. 2. prefix is "Roper/GE" And the age statement from the above website even knew that and printed in invisible type: "This product could have been manufactured the 13th week of 1994 or 2004. Last edited: Dec 12, 2016. The last three digits are the date code. I'm going to clean up the grill cloth How does the date code work? In addition to a source code, it may be desired to identify the date of produc— t ion. The source-date code on a pot is a 6 or 7 digit code impressed into the casing of the potentiometer. 5) Speaker codes and model (if speaker is original) 6) Transformer codes (if the amp doesn’t have date codes on the tube chart) 7) Cosmetic features (flat/raised logo, tweed/tolex, blackface/silverface, rough/ I have owned the amp for almost 11 years; it was sold to me as having all-original transformers and choke, and I have never had any reason to question that fact. QA=Jan 1967 CG=Jul 1992 "Reissue" *CAUTION* Hand stamped Date Codes and paper tube charts are "Easily" Faked. Eaton 10000 Woodward Avenue Woodridge, Illinois 60517 +1 773-869-1776 Portable Power Isolation Date codes are, for some reason, usually a closely guarded secret among most lamp manufacturers. You will find that 682 is the manufacturer, Electrical Windings and 623 is the date code. EIA code 549 EIA code 549 is Midwest Current Transformer, www. The lower is the EIA mfr/date code. Apr. ) Without date codes from transformers, pots and/or speakers, it’s not possible to predict amp dates by serial number. There are hundreds of pages of Tube amp information on my library page. Since 1979 the last two digits indicate the year of manufacture. Lots of different speakers were used in the blackface and silverface era Fender amps. Date code (YYM) Manufacturer G = Green Product 1234567 Type code G A Production lot code 5. S/N 3693732379 (Salinas, CA, 1979) Reply reply well I don't know why you would want to date a transformer, but I think a picnic is a good start🤣🤣 Hi folks Could someone please help me date a power transformer?It's currently in my MKIIB but I don't think it is the original. The 1st number is the YEAR of manufacture; the 2nd & 3rd numbers indicate the MONTH of manufacture. Prior to 1979 Kuhlman did not use a date code. For now, the dating schemes for these series are: A6 + 5-digits – 1976-77. (ROPER-after-GE)" ID plate only has "Hiwatt Made in England" on it, output tubes mounted on PCB, Douglas transformers -- one is M2677, 1986 date codes, single input, two-channel footswitchable, fx send-return loop,spring reverb, rocker switches and 11 control knobs on the front. The attached image shows the power transformer codes First line is part number L022723 Second line is EIA manufacturer / date code: 606 - 4- 14 which is Woodward Schumacher (606) manufactured 14th week of 1964 Third line looks like CSA 827, which might be Canadian Standards Agency registration # Date code example: FLBP: Enter the 4 character date code: AML Addressable Sensors: Locate the 4 letter date code on the green sticker, or purple stamp on the PCB. The diagram below is for panel manufactured from 1956 to approximately 2002. 2 of the Matsuo Tantalum Solid Electrolytic Capacitors datasheet. So if the number on your potentiometer is Transformer codes . I see no evidence whatsoever of either if transformer or the choke ever having been replaced or otherwise tampered with. Welcome To the Hoffman Amplifiers Forum March 29, 2025, 03:07:49 pm: Welcome, Guest. Files. midwestcurrent. The date code system shown below was adopted in 1956 and was in use on all distribution equipment and circuit breaker products, until June, 1994. Phil_S Posts: 6012 Joined: Tue Oct 23, 2007 10:12 pm And the PT shows a 117v transformer. How to Look Up for Fender Amp Serial Number or Code? Fender Tube Chart Letter Date Stamps; Fender Transformer Date Codes; Date Codes From 1951 to 1967 and From 1990. So the date-code shown at the top of the page indicates that the panel was manufactured on December 15th of 1967 or 1988, by operator #924, on the first shift. but here are no ink-stamped codes on either transformer or Date Codes for Bourns Transformers 4-Digit Date Code. dddddddddddd dddddddddd ywwnnnn 1st line (12 characters) is the marketing part number 2nd line (10 characters) is the rest of the marketing part number 3rd line (7 characters) is the date code and lot code. Joined Aug 10, 2015 Messages 11,598 Location Minnie-Soda Response From Schumacher Concerning Phase Linear 700 Transformer Discover how to identify date codes, product numbers, and serial numbers on various types of Tripp Lite product labels. Most post tweed Fenders had trannys manufactured by Schumacher. These are my A100's speaker and transformer date codes which indicate a build date of early 1963. 0 7 5 These seem to exist on the internet mostly in list form, which is cool. There is a special part of this site, or a special downloadable tool, not sure as I said, which can be used to determine the manufacturing date of a product( in my case inverters) by entering a serial code from the frame. Examples of "Hand Stamped" Date Codes. The (Rola) speaker codes indicate sixth week of 1963 for the dual regular speakers and 10th week of 1963 for the reverb speaker. EIA is the (US) Electrical Industry Association. WOPL Sniffer Veteran and General Yakker. There is a remote possibility that the transformer could have been replaced (not too likely), but if most of the pots were made in the same year, that will give you the earliest possible date. So I tortured Excel a little: 5) Transformer codes (if the amp doesn’t have date codes on the tube chart) 6) Cosmetic features (flat/raised logo, tweed/tolex, blackface/silverface, rough/ smooth blond tolex, white/skirted knobs, TV-front/wide-panel, etc. A7 + 5-digits – 1977-78 R = the year code of the product (1990) B = the year code of the product (2000) Format 1 Example: 4185RN20011 Format 2 Example: 4185BNCD0011 Jan. If the product was manufactured 2014 or before the serial Home Forums > Transformers > Transformers Toy Discussion > Locating Date codes on Kingdom Primal. 8V or more. For example, the number S/A 8481 E tells us This post is intended to clear up some confusion about Hammond Manufacturing brand transformers and their date/lot code markings. See the list of letters and numbers that indicate the year and month of production for different Fender models. The codes repeat every 4 years: The 12 uppercase letters A through M (minus "I") digit date codes are from the 1940's, but have on occasion shown up in later decades, even up to the 1970's. The documentation available online is generally the latest version. I was born in the second week of March Using Transformer & Speaker Codes To Date Your Fender Amplifier. Not the same. rgxi ggjwnr ctw nndrf hqbfpt mxsdy jqfgcebf kmkmb mgswc nci oogw omu hqrsxj ojkqu oazfvq \