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Register or Login. Gibson guitars. Effect equipment. Guitar heroes. Serial numbers. Read source code The first 3 digits on a pot are the manufacturer code.

Potentiometer codes

Fender Tube amp codes: – 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. These codes have nothing to do with the serial number that is stamped on the right rear of the chassis – Those numbers are posted below.

The code contained information regarding the manufacture and date of production. These codes have been used on components including potentiometers (pots).

If the serial number of an electric guitar is missing or is no longer readable, you can also find the approximate age of the guitar on the basis of the potentiometers. On the potentiometer is a code that gives information about the manufacturer and the year and week when it is made. EIA code. Where to find the code Stamped or punched you can see a six- or seven-digit EIA code on the back or side of the potentiometer. The potentiometers pots on the guitar offer a oppotunity to find the production date by a EIA Electronics Industry Association code.

Assuming that the pots are original and have not been replaced, the production year of the guitar can be determined approximately. The EIA code on pots indicates the manufacturer and date when they are made. It is an approach because of course there is a time between the manufacture date of the potentiometer and its installation on the guitar. Also for lesser known brands without a serial number, this is a method to determine the approximate production date of a guitar.

Often the EIA code cannot be read by the solder on the potentiometer. If you have experience with soldering, you can remove the solder where necessary with a solder sucker or even better with desoldering braid.

Potentiometer Codes On Gibson Bass Guitars

So you need to figure out the year of production for your Fender guitar or bass. You’re not alone. Fenders rank as the most frequently bought and sold instruments on Reverb , and finding a precise date of manufacture can be key to determining the value and specifics of an instrument.

The pots in one of my pedals looks – nobel I would assume that the pedal was from the 15th week of .right? Any help would be good.

Email: billy guitars. On the inside of your vintage Fender amplifier there is a paper chart with the tube locations for that particular model. On the tube chart there will be a rubber ink stamp with two letters. In the chart below you will see the letters that coincide with the year and month of the amps manufacture. The first letter is the year and the second letter is the month.

If the tube chart is not in the amp or has been torn or damaged and you cannot read the ink stamped letters you can date the amp by the codes on the potentiometers. Below is a chart of the manufacturing codes for potentiometers. The last three digits are the date code.

1963-1966 Magnatone Custom Series Dating

Find a better dating on logged national guitars as the cts made. Also: the same part vi by the components were made by the decade of ’65, narrow panel tweed, potentiometers. But they may be difficult, the same part vi by cts from 01 to my.

There are many websites that detail date coding pots, speakers, and transformers​. If what follows doesn’t provide you with the date code information you need.

If you’ve been reading articles about dating a vintage guitar, you may well have come across mention of pot codes, and the concept of using pot codes to date your guitar. The pots, or potentiometers to give their full name, are the variable resistors that control volume and tone. Better quality pots are often stamped with a number of codes; typically part numbers, date of production, manufacturers codes and resistance values.

Many pots don’t carry all of this information, but the better quality guitars produced in America regularly do. So where are these codes? Normally they are stamped or inked onto the back or sides of the pot. So reading them will require opening control cavities, removing scratchplates, or in the case of a semi acoustic, removing the pots entirely.

Codes can be worn, obscured by solder and other components, or simply very small. Finding them is not always easy; this is obviously not something for the faint-hearted, but once performed a few times, nowhere near as daunting as it might at first seem. There are many exceptions and variations to the general rules described below, some of which are highlighted in the examples at the end. But read on, dating a vintage guitar with pot codes is sometimes more reliable than dating with serial numbers!

Many pots do not have part numbers, but the larger guitar manufacturers did list pots by part number in their spare parts manuals.

How to Date Fender and Gibson guitars with potentiometer codes

The Code on the tube chart of your Fender Amp is made up of two letters. The First letter equates to the Year and the Second letter to the Month. Reissue amps also use stamped Date Codes. Examples of “Hand Stamped” Date Codes. The source-date code on a pot is a 6 or 7 digit code impressed into the casing of the potentiometer.

When dating an instrument by the ‘pot code,’ keep two things in mind: The potentiometers must be original to the piece (new solder, or a date code that is off by.

I pulled this information from Google’s cache of the site. If anyone feels this page should be taken down, please feel free to contact me. Ampegs can be divided into six distinct groups for dating purposes: pre, to mid, early to , to , to , and post Each group uses a unique serialization scheme that can be used to assist in dating the amps, but in many cases, it is the features and characteristics of the amps that determine the year of manufacture.

Electronic Industries Association EIA codes can also be very useful for giving clues as to an amp’s age. These codes can be found on speakers, transformers, pots, capacitors, and multi-section electrolytic “can” caps.

Dating A ’70s Les Paul

Zachary R. Fjestad is a freelance writer who specializes in guitars and amplifiers including the history behind them and their current value. Fjestad has been evaluating and appraising guitars for over 20 years. For more information, email Zachary at zacharyfjestad hotmail. Guitars Bass Amps Pedals Players.

Dating you’ve been reading articles pots dating a vintage guitar, you may reading have come across mention of pot codes. The pots, or potentiometers to give.

Ever since Fender started making basses in , they dated certain parts and components to give a general idea of when the instrument was produced. Then there are pickup and potentiometer date codes, serial numbers, and even bridge stamps and pickguard codes in some cases. So how do you properly determine the year of production? They just grabbed whatever part or component was ready and put the instrument together to fill an order as fast as possible.

The general rule of thumb is that a bass is as old as its newest part, or at least its latest dated part. So, if you have a Fender with a neck date of and the pots are dated , then you have a Fender Bass. There are some years in particular that can get really tricky. Some Precision Basses have no neck date stamp at all, and several Fender basses from to have neck stamp codes that are difficult to decipher and sometimes impossible to read.

Body stamp dates were used by Fender from the early s to the mids, after which they stopped until the s where they started again sporadically to this day. Potentiometer codes are pretty reliable for dating, usually indicating the year and week it was made. One exception is that most Fender pots from to are dated to Pickups were only date stamped from to about , but they can be really useful in helping pin down the year.


Forgot your password? By Bruno , September 3, in Effects and Processors. Any help would be good. Phaser my man. Impossible to find any info on the company though, Discofreq has a few I’m sure.

Serial Number, Date – Dating, Speaker code & Tube Information by; Chuck Therefore, if you have a push-pull pot, your amp is or newer.

This page contains details about the Magnatone Custom Series amps. For an overview, see Magnatone Custom Series , or for a history of the Magnatone amps from , see The history of the Magnatone brand. Serial Numbers are located on the back panel and are listed with the Model. I haven’t have been able to find any concrete information regarding serial numbers for these amps Though its not critical a critical aspect of the history of these amplifiers, the more we know about serial numbers, the more we can make guesses on production numbers.

Early Custom’s were build without the interlock switches, although the interlock was on the schematic inside the amp. The metal part of the handle had a bare metal finish on early models, and soon there after they started to paint them black. Also, the badge plates were different on the very early Customs, eventually they were produced with the large “M” below right.

It is possible that the first models had yet a different plate than the style of the early M7 plate below. This rather cheesey acrylic badge was used on some Customs. The Why? Besides this very early M4, I’ve seen it used on other early Customs as well as some Silver Customs. There are many websites that detail date coding pots, speakers, and transformers.

Reading pot codes

Seriously though, the best way to date a vintage SG is not through the serial number, but rather by the potentiometer codes and other features it has. Only in did Gibson switch to a more reliable serial number system which can be trusted as a dating tool. Even then, you want to have a rough idea of when it was made based on the features first, because they have used several different serial number formats through the years.

digits). Moust’s research has indicatedthat there are no source date codes on any guitar pots before the late s, and no single-digit year code after

Copyright , 20th Century Guitar Magazine. The strange and mysterious neck codes found on Fenders from — 80 have been all but ignored by the vintage and collectible guitar community. Perhaps this is due to the fact that s Fenders have, until recently, been all but ignored by the vintage and collectible guitar community. Now that these instruments are hitting the “magical” year mark, they have suddenly gained attention.

In , CBS-Fender began to implement a new type of neck stamp in place of the usual date stamp consisting of model code, month, year, neck width e. The new code consisted of 6, 7 or 8 digits and was usually stamped in green ink. An example of this type of neck code found on a Precision Bass is B. CBS-Fender used this neck code system concurrently with the standard Month-Year date stamp that had been in use since Both type of stamps can be found on Fenders made from through To clarify, a neck would have one or the other type of stamp… not both.

It is not known why Fender used two completely different systems at the same time.

Billy Penn’s 300Guitars

Since I primarily collect amps by Fender, and guitars by Gibson, Fender, Martin, National, Epiphone, Gretsch and Rickenbacker, I really can’t help them with these other less popular brands. As you have probably noticed, there is plenty of information here to help date the brands that I am interested in. But where does that leave everyone else? Well I’m not one to leave you out in the informational cold, so here’s something that I use quite often in dating amplifiers and electric guitars.

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.

Pot codes on BURNY’s used from to , also by Kasuga, Matsumoku and Dyna, have the following format: First line: MkOhmA (tone) or MkOhmB.

Early electric versions of Hofner models can be roughly dated by some of the components used. In particular, the rectangular and oval consoles were fitted with ‘Preh’ brand volume control potentiometers – “pots”, which carry a manufacture date in code on them. S imply undo the small screws holding the panel on, and lift it out of the body. It may be useful to have a cloth to lay it on, to protect the finish of the guitar. T his is the underside of one of the ‘Preh’ brand pots – the code is stamped into the brown fibreboard base.

The first part, K is simply the resistance value of the component, and has no relevance for dating. The numbers following are the ones to note. Quite simply, it is a composite of the number of the week in which the component was made, and the last digit of the year in question: week , plus year ending. The code can therefore be either two or three numbers: ’90’ would be the 9th week of , ” the 10th week, and so on.

So, in this case, ” means the 34th week of – somewhere towards the end of August. Interestingly, the other pot is dated ”, which at three weeks later, is mid-September The guitar carries a body date of 30 September , so we can therefore obtain a good idea of when it was assembled.

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