I've got Pro Co Vintage Reissue Big Box Rat & want to determine the year of manufacture.
I believe you can also open up your Rat and look at the pots - the two numbers in the middle are the year the pedal was made.
In 1978, "The RAT" was being built as a custom-order product.
Originally, 1N914 diodes were used, which were later replaced with 1N4148 since RAT2.
The 'Turbo RAT' pedal uses red LEDs for this purpose (red LEDs have about a twice as high forward voltage as the original silicon diodes), while the 'You Dirty RAT' pedal uses 1N34A germanium diodes (clipping at a lower forward voltage).
Pro Co has also introduced tonal variations of the RAT, including the Turbo RAT and You Dirty RAT, among others.
The Pro Co RAT became very popular in the early 1980s, thanks in part to fame gained by its use by several artists.
In 1983, Pro Co switched to a smaller, U-shaped enclosure.
Finally, in 1988, the RAT2 was introduced, which included an on/off LED.I spent the first moments feeling the weight of the steel, and looking inside at the circuit board. I missed the pedal, even if there is no LED to the reissue. The Circuit Board has the number ‘2492’ stamped onto it, including RAT RE-ISSUE 1991.Dating this by serial number seems to be a trivial effort by the looks of the boards out there.The board itself holds an inscription: Interesting.I’m going to replace the Carling True Bypass footswitch with the same type, and the jacks must be changed as well. The sound of this Rat, when I played it back in 2000 was something else.Other models of RAT products include: The design is based around a single opamp, originally the Motorola LM308 (switched to Texas Instruments OP07DP around 2002-2003).