aA763 to aB763 change

[Chris / CMW amps]

Hi all

Does anybody know when the blackface circuits changed from the aA763 to the aB763 types.

Tia!

[stokes]

If you look at the Fender Amp Field Guide,you will see that different amps show different dates for the associated circuit.Like the BF Bandmaster lists the AB763 from '63 thru '67.But the BF Deluxe shows the AA763 was made from '63 thru '66.The Princeton shows the AA763 went to the AA964 during the same period.So the best I can come up with is somewhere between '63 and '68

[Bruce / Mission Amps]

Probably when Fender ran out of the pre-printed tube charts!
Cheap skates they were.

[Chris / CMW amps]

nope & nope (no pun!!!!)

I just want to know when in '63 or '64 they did introduce the aB763 versions after the aA763 versions.

[artist]

Fender Amp Filed Guide

Hi Chris
I found this here: http://www.ampwares.com/ffg/index.html

# Circuit Code: In 1963 Fender stoped using model numbers to identify schematics and began using the model name and an assigned circuit number. These circuit numbers which are located on the tube chart can be usefull for getting a rough date on an amp. Fender often used the same circuit for many years so this is not a very accurate method for amp dating. The code is simple, the first two letters are the revision, where AA is the first revision, AB is the second, etc. The next one or two numbers are the month where January is 1 and December is 12. The last two numbers are the year.
Example: AB763 = second revision, July, 1963
AA1070 = First revision, October, 1970

# Misc Dating Info:

* Silver face amps with the aluminum trimmed grilles are from 67 or 69.
* The fist Master volume controls were installed in 72.
* The raised "Fender" grille logo lost its tail around 76. There are exceptions to this rule like the the Bronco.
* Fender installed casters on some larger amps and cabs beginning in 72


Stefan

[AlAmps]

Hi all

Does anybody know when the blackface circuits changed from the aA763 to the aB763 types.

Tia!

End 63

Al

[Chris / CMW amps]

End 63

Al

Danke schön.

[Rick Erickson]

Does anybody know when the blackface circuits changed from the aA763 to the aB763 types.

Does anybody realy care? If so I can't imagine why. I don't have time enough to try...

Sorry Chris - this just reminded me of an old Chicago tune... <grin>