Where Is Mfg Date on Fender Vibrolux Reverb

Dating 1951-1969

On the inside of the cabinets of Fender amplifiers that were built after 1950 and before 1970, a sticker is by and large attached. This indicates the type of the tubes used and their location on the physique. Besides on this spine stamped two letters (sometimes handwritten) indicating a date code.

From 1990
All Fender amplifiers manufactured from 1990 until now, take in a day of the month code printed on the timbre assurance (QA) sticker on the rear of the chassis. This black-silver sticker shows signatures or initials of employees later on the finished resound and electrical tests.
The last line also has a stamped or handwritten 2-alphabetic character date code. Handwritten is sometimes difficult to read (regard image).
The forward alphabetic character is the year and the second letter of the alphabet is month.


If no more QA or tube location sticker is saved or it is awful take, consider the rear of the chassis happening the right side where a chassis number is punched. You can decipher the year of construction exploitation the particular date decipherer. Date inscribe from 1951 to 1969 and and from 1990

Letter Computer code	Vintage year	Retro year	Calendar month
A	1951	1990	January
B	1952	1991	February
C	1953	1992	March
D	1954	1993	April
E	1955	1994	Whitethorn
F	1956	1995	June
G	1957	1996	July
H	1958	1997	August
I	1959	1998	September
J	1960	1999	October
K	1961	-	November
L	1962	-	December
M	1963	-	-
N	1964	-	-
O	1965	-	-
P	1966	-	-
Q	1967	-	-
R	1968	-	-
S	1969	-	-

About indications that you can also agnize the production yr.
In front the CBS earned run average (before 1965) Blackface amplifiers were feature labeled Fender Electric Instrument .
Blackface amplifiers from 1964 and some from early 1965 did not bear the Fender logo on the grill cloth.

After the acquisition of Fender aside CBS in Jan 1965, amplifiers were labelled as Cowcatcher Musical Instruments .

From 1974 a potentiometer with insistency-pull switch was added to some amplifiers.

The logo happening the grill cloth of the amplifier also gives an meter reading of when it was produced.
A logo with tail is from before 1973. Aft 1973 the logo was anurous. With fewer exceptions. As recollective as there was a stock with as logos, they were misused randomly in 1973.
Amplifiers from that year and perhaps also in 1974 can therefore have the new or old logo.

tailless (after 1973)      with can (before 1973) There are a come of amplifiers from '68 and '69 announced, including the Vibro Champ and Bassman, which besides had a acaudate logo. Nevertheless, these logos are made of plastic and slightly smaller than the metals. Geological dating of components
If there are No sticker operating room chassis figure at all, the the components can also offer a resolution for dating the year of construction of the amplifier.
(Assuming the components is original and has not been replaced.)

Transformer
With help of the EIA (Electronics Manufacture Association) number on the transformer, the production day of the month hindquarters be determined.
This is non the production see of the amplifier, because the transformer has already been made before and may have been awhile in computer memory.

The EIA number on the transformer which Fender has used the nigh starts with 606, followed by 3 or 4 digits. 606 is the producer (Bob Woodward-Schumacher), but a transformer from some other manufacturer Crataegus laevigata also have been used. (see EIA factory codes)

With 3 digits, the first fingerbreadth is the last fingerbreadth of the decade of the 20th C. The last two digits is the week of that year.
At 4 digits, the first two digits are the year of the 20th century.

Example: 606 6849 is 1968 workweek 49. If the production date of the transformer is now noted, add at least 6 months to the production particular date of the amplifier. From the example, the amplifier could wealthy person been built in 1969.

Speakers and potentiometers
What applies to the transformer too applies to speakers and potmeters.

Speakers
Fender old Jensen speakers until 1972.
In that year the Jensen yield was transferred to Rola. (Rola was already a part of Johannes Vilhelm Jensen). When Rola started making speakers for Jensen in 1972, Rola too used Jensen's EIA cipher in the beginning (220). At the end of 1972, Rola denaturised the code to 285.

CTS
Sometimes Fender used CTS speakers in the 1960s. 'tween the mid 1960s and early 1970s, the CTS 10-inch Alnico was regularly used in Ace Reverbs.

Eminence
Tubercle (supported in 1966 by late CTS employee Bob Gault) ready-made speakers especially for Fender according to those specifications. From the early eighties these were standard in almost altogether tube amplifiers.

Utah
Despite the fact that the Mormon State speakers from the 50s and 60s were of very nifty quality, Fender did non use them much during that period. IT was not until the 1970s that these spaekers became more wide in use.

But not all speaker manufacturers work with an EIA encrypt.
For example, Celestion has its own date coding method that consists of 2 letters with 1 operating room 2 digits.
Example: GK12 is July 12, 1977.
23HA is August 23, 1956 surgery Honourable 23, 1968.
The Celestion dating system is included in the speaker decoder.
Potentiometers
In the 1950s, Fender mainly used potmeters from the Stackpole make (304). Halfway through 1963, the switch was successful to the CTS brand (137). In 1967 Cowcatcher bought a very large stock of CTS and was used for over 5 years. Amplifiers (and as wel guitars) successful in 1973 can therefore calm have the 1967 potmeters with EIA numbers from the stock that was purchased in 1967.
(see also Potentiometer decoder) Much manufacturers can exist launch with the EIA factory decipherer past explorative along their EIA code or in the component list.

EIA factory codes and component leaning

Where Is Mfg Date on Fender Vibrolux Reverb

Source: https://www.guitarinsite.nl/serienummers-fender-amps_eng.php

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