The gain will be limited by op-amp characteristics and also by the clipping diodes action, as it will be studied in the Diode Clipping Section. However, the voltage gain of this stage will not reach such a values as 67dB. The voltage gain is trimmed with the distortion knob, in the non inverting topology can be calculated as. The Clipping Amplifier is the core of the circuit, it is made of a non-inverting op-amp amplifier with variable voltage gain and some filters to shape the distortion response. The Power Supply stage provides 9V for the active circuits op-amp and transistor. It uses a single layer PCB with standard through-hole components which easily fits in the steel enclosure.
The distortion stage is followed by a tone filter and an output buffer stage that ends up with a tone control. The distortion is produced using a variable gain circuit with diodes clipping the waveform. The design is based on the LM single op-amp.
#PROCO RAT PEDAL SERIAL NUMBER PRO#
Although the pedal was originally built as custom-order product inPro Co began to mass produce it in Pro Co Rat Schematic. Proco Vintage Rat Pedal.The original circuit and appearance suffered some changes over the different revisions but the tone remained the same. Sounds The sound of this Rat, when I played it back in was something else. The Proco Vintage Rat Pedal The Prodigal Pedal As in the story of the prodigalthis pedal has been in some filthy places… Although this is not the pedal that was stolen from me in That one was in pristine condition, made in LMI found this similar ProCo Vintage Rat Reissue at a steal of a price on the e-bay. Interference can rob you of sound! Guitarburger is determined to produce a blog worthy of the bin aboput guitars, pedals, and amps. Like you, I want my guitar to sound true, and for each note to be savored. Need new tuners? Losing your tune? Do you have problems that no matter how much you wrap the strings, they consistently go out of tune? I loved i…and looks like I have another chance to love it again! Partscasters…why not, right?
The number on the pot is R, and as the 4th and 5th numbers are the date of manufacture, this one was made in The sound of this Rat, when I played it back in was something else. I did run across some great resources here and here that helped me to find out exactly which model and year this was made by considering the date of the potentiometers.
#PROCO RAT PEDAL SERIAL NUMBER SERIAL NUMBER#
The pedal has had some rust on the pedal switch, so I brushed out the circuit board for fun.ĭating this by serial number seems to be a trivial effort by the looks of the boards out there. Without even playing it, I took it apart and cleaned off every surface. I missed the pedal, even if there is no LED to the reissue. I spent the first moments feeling the weight of the steel, and looking inside at the circuit board.
As in the story of the prodigalthis pedal has been in some filthy places… Although this is not the pedal that was stolen from me in That one was in pristine condition, made in LMI found this similar ProCo Vintage Rat Reissue at a steal of a price on the e-bay.
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