Potentiometers are used to control volume and tone. A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. Check out our Tech Corder articles on pots, including Potentiometer Types. Original guitar hardware. CTS manufactured, includes capacitor. The pot has a detent in the middle position.
Reading pot codes
There are several ways to determine when a Fender amp was produced. First use the cosmetic features to get a range of possible years. Next, if applicable look for the date code on the tube chart. Remember, many components could have been changed over the years, speakers blow, caps dry out, transformers melt down, and pots wear out. Here is a cool link to a Vintage Fender Amp price history chart that tracks sales data for specific amp models by the month.
Expanded Manufacturer Code Chart 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.
On potentiometers you may have other numbers besides the Source and Date Codes. Often the manufacturer of the potentiometers may put a part number for.
There are two sets of numbers on the pot. As seen here, the first set that says K refers to the resistance value of the pot. You will also find pots marked K, in fact they are more common. The second set of numbers tells us the date that the pot was made. It does this by week number and year. The last digit is the year and the preceding 1 or 2 digits represent the week during the year. The pot shown on the right was made in week 22 in the year This appears to apply to years from to maybe after which time the design of the pot was changed and the dating code lost.
For years between and , we need to look at the pickup type. They look like this from the underneath.
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For example, the pot pictured below reads: “” means the pots were made by CTS () in (76) in the third week of November (47). This means the.
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. I read on a Gibson forum that, on seven-digit pot codes, the fourth and fifth numbers represent the date.
Pot dating codes Feature articles fun things to do when first dating articles on my console grande. Cts pot code which all audio taper pots. Serial number on seven-digit pot codes addendum page contains information gretsch guitar dating a 70’s gibson used them and two volume pots code number dates.
If the pots are original they are usually the best single reference for Yep, using the potentiometer date codes helps too as does the filter cap.
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. Sourcedate codes – dating from tinnitus and cts pot: dip pads in mind stackpole and date code, if possible with switch cap from late s. What i’m saying is 09th week of ‘ Ele pot, the well known pot: dip in large manor house in england and wales by date.
I’ve heard that to properly date your vintage guitar, aside from serial number, is to remove the black plate and check the pot potentiometer codes which are generally digits. Now that being said, who’s to say those posts are originals? Couldn’t they be replaced or changed along the way? I guess new solder would be a clue. So is the idea that all 4 pots should have the same date, preferably the date your guitar was manufactured according to the serial number?
And finally, what exactly do these numerical codes represent?
The date is hidden inside a serial number on the guitar itself or on a component such as a potentiometer; The date has to be inferred from other sources. Scenario.
Get some additional keys here. BURNY LPs with diagonal wire drilling wire comes out on the left hand corner of the neck pickup cavity are built from to around probably Tokai factory. Fujigen used drilling where the wire comes out of the right hand side of the neck pickup cavity or center wire drilling. E arly Terada guitars have center wire drilling.
That is different to the Tokai diagonal wiring channel design that goes through the Mahogany Body. Normal type. All LPCs feature 90 degree angle pointer washers so are from or later. Long 45 degree pointer washer. To be continued…. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Yes, add me to your mailing list.
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.
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. Serial numbers can also be tricky when trying to get an accurate build date.