Proco Rat Pedal Serial Number

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Pro Co RAT2

The Pro Co 'The RAT' is a guitar effects pedal produced by Pro Co Sound. The original RAT was developed in the basement of Pro Co's Kalamazoo, Michigan facility in 1978.[1] Numerous variations of the original RAT pedal are still being produced today.

The basic RAT has changed in appearance over the years, but its tone has remained largely the same. 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.

  • 3Versions of the RAT

History[edit]

The origins of the Pro Co 'The RAT' can be traced back to the mid-1970s, when Pro Co engineers Scott Burnham and Steve Kiraly repaired and hot-rodded existing distortion pedals, such as the Dallas Arbiter Fuzz Face. Burnham decided he could build a superior product from the ground up, and designed 'The RAT' pedal.

In 1978, 'The RAT' was being built as a custom-order product.[2] Only twelve of these pedals (including one prototype), commonly referred to as the 'Bud Box' RAT, were produced. Each pedal was built in a standard project box, hand painted, and hand drilled. In 1979, Pro Co began mass-producing them.[2] This iteration was built in a custom designed, rectangular sheet-metal enclosure, with an L shaped removable top/back section giving access to the internals. The top panel was labeled with Pro Co Sound 'The RAT' and the three control knobs as Distortion, Tone and Volume.

In 1983, Pro Co switched to a smaller, U-shaped enclosure. Finally, in 1988, the RAT2 was introduced, which included an on/off LED. Various RAT2 circuit board layouts and wiring configurations have surfaced in the last few years, including the noted 'RAT3 version A and B' all under the RAT2 moniker. The RAT2 model is still available today, but in 2008 production moved to China and is now manufactured by Neutrik for Pro Co Sound.

Other models of RAT products include:[2]

  • R2DU (1984-1988)
  • Juggernaut (original) (1979-1981)
  • RAT2 (1988–present)
  • Turbo RAT (1989–present)
  • Vintage RAT Reissue (1991-2005)
  • BRAT / Roadkill (1997-2001)
  • Deucetone RAT (2002–present)
  • Juggernaut (reissue) (2003–present)
  • 25th Silver Anniversary RAT (2003)
  • You Dirty RAT (2004–present)
  • SOLO (2006–present)
  • '85 Whiteface RAT Reissue (2010)

Circuitry[edit]

The Pro Co 'The RAT' is a distortion pedal with a quite simple circuit, which can be broken down into four simpler blocks: distortion stage, tone control, output stage and power supply.[2]

The design is based around a single opamp, originally the Motorola LM308 (switched to Texas Instruments OP07DP around 2002-2003). The distortion is produced using a variable gain circuit with diodes shorting the output to ground at a certain voltage level to produce hard clipping of the input waveform. 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).[2][3]The distortion stage is followed by a passive 'reverse' tone filter and volume control.

The general design is very similar to the Boss DS-1 distortion pedal. A major difference is the opamp used (the LM308). Known for its poor slew rate, it largely accounts for the sonic difference between the two pedals.

Versions of the RAT[edit]

Current product line[edit]

  • RAT2 (Silicon clipping diodes)
  • Turbo RAT (Red LED clipping diodes)
  • You Dirty RAT (Germanium clipping diodes)
  • FAT RAT (Silicon / MOSFET / Germanium clipping diodes mode, 'Thick' switch (treble cut), 9/18V and a swappable opamp)
  • Deucetone RAT (Dual RAT (2-in-1) pedal (separate In / Out jacks per side), Side A Silicon / LED / Germanium clipping diodes mode, Side B Silicon / LED / Diode lift clipping diode mode)
  • Juggernaut (Reissue version)

Non-RAT moniker pedals currently produced by ProCo[edit]

  • Solo (Three asymmetric clipping diode pairs modes (Hot / Melt / Burn), Scoop control (Midrange), Tone (instead of typical 'reverse' Filter tone control), Texas Instruments OP07DP opamp. The prototype was called 'RATZO' and featured a center placed dual-gang pot for 'Tone' & 'Scoop' controls along with the 'Distortion' and 'Volume' controls in typical RAT fashion)

Discontinued products[edit]

  • 'Bud Box' RAT (The original handbuilt RAT)
  • 'Big Box' RAT (Distinct big rectangular box pedal)
  • Juggernaut (also called 'Bass RAT') (Original version) (modified RAT circuit with 'Low Pass' filtering in place, Dual (2-in-1) RAT size enclosure, Right side: 'Mix' (between Drive / Clean ratio), Master Volume and on the Left side: Amount (Drive), Tone, Vol. The pedal also features an external effects loop)
  • 'Small Box' RAT (Bent steel U-shape enclosure)
  • R2DU (19 inch rackmountable double RAT pedal, usable in cascade mode or dual channel)
  • BRAT / Roadkill ('budget' USA-made RAT2 derivative circuit including the Motorola LM308 opamp with the negative-feedback loop lifted. The front faceplate is two-sided with one 'BRAT' print side and on the other side a 'Roadkill' print. Note, this pedal is 9 V battery fed only)
  • Vintage RAT Reissue (rectangular shaped 'Big Box' reissue model)
  • '85 Whiteface RAT Reissue (Limited run '10)

Special Runs[edit]

  • IKEBE 40th Anniversary: All-white RAT2 pedal with black lettering, white knobs and a bright blue LED (Japan only model).
  • 25th year Silver Anniversary Rat: 'Big Box' pedal in a distinct silver coloured stainless steel enclosure with the tagline '25 years of Grunge' (Limited anniversary model, handed out to select artists and technicians by Pro Co sound).

Popular modifications to the RAT[edit]

The RAT is a popular pedal for modifying. Some of the possible modifications include:

Honda crv front license plate holder installation. Choose one that complements your car color so that it does not stand out awkwardly from your car's paint finish.

  • Resistor Mods: The Ruetz RAT mod which involves simply cutting the 47 Ωresistor to disengage half of the drive circuit. Gain is reduced somewhat and the bass is no longer attenuated. Additionally, the 560 Ω resistor controlling the lower half of the distortion filter can receive similar treatment. Either mod will translate to a thicker (fuzz like) bass response at the expense of losing distortion.[4]
  • Toggle Switches: The Mightier Mouse mod involves a 3-way switch to select between RAT / RAT2 (clipping via silicon diodes), Turbo RAT (clipping via red LEDs), and FAT RAT (MOSFET clipping) modes. It also shows an alternative to the Ruetz RAT mod by using a potentiometer or trimpot to replace the resistor instead of cutting it out of the circuit.[5]
  • Diode Lift: Removing one of the two (asymmetric clipping) or both (pure opamp clipping) clipping diodes results in a volume boost with a crunchier tone.
  • Chip Substitutions: The original RAT pedals featured the rare Motorola LM308 opamp, which is now quite expensive to acquire. Recent RAT2 pedals nowawadays feature the widely available Texas Instruments OP07DP. Other opamps that people try, include: the CA3130EZ (MOSFET-based), the NE5535A / NE5534AP (high slew rate, low noise), the LM741 (low drive) and finally the TL071 / TL081 (both BI-FET based). Many RAT modders install an opamp socket to enable easy swapping of opamps, which is similar to what people do with the Ibanez Tube Screamer circuit.
  • Capacitor Mods: 'softening' ceramic caps replaced with silver mica or metal film caps for better tonal fidelity. These include the 30 pF cap riding the opamp chip and the single 100 pF cap.
  • Power Jack: 2.1 mm (Roland / BOSS-style) 9 V DC adapter socket mod. Because the tip on the BOSS-style adapter is negative, one needs to install a plastic 2.1 mm socket to avoid shorting out the barrel of the plug against the RAT's steel chassis (note, the official website says it uses a positive tip adapter).

Notable users[edit]

  • Ichirou Agata of Melt-Banana[6]
  • John Ashton of Psychedelic Furs
  • Trey Azagthoth of Morbid Angel
  • Jeff Beck[7]
  • Nels Cline of Wilco[8]
  • Lawrence Chandler[9]
  • Kurt Cobain[10]
  • Graham Coxon[1]
  • Kevin Eubanks[11]
  • Bill Frisell[12]
  • David Gilmour[13][14]
  • Dave Grohl[15][16]
  • John Linger of Neils Children
  • Thurston Moore[17]
  • Joe Perry[18]
  • Paul Reynolds of A Flock of Seagulls
  • Kurt Rosenwinkel[19]
  • John Scofield[20]
  • Sonny Sharrock[21]
  • Andy Summers[22]
  • Alex Turner[23]
  • Jamie West-Oram of The Fixx
  • Thom Yorke.[24]
  • Xan McCurdy of Cake[25]
  • Boris[26]

References[edit]

  1. ^ abWilliams, Stuart (2 August 2010). 'Pro Co Reissue '85 Whiteface RAT'. MusicRadar. Retrieved 29 January 2012.
  2. ^ abcde'Pro Co Rat Analysis'. ElectroSmash.
  3. ^Tranter, G. (July 9, 2015). 'Multi-RAT'. DIYStompBoxes. Retrieved 18 April 2016.
  4. ^DIY Tube Guitar Amp Page
  5. ^http://www.beavisaudio.com/Projects/FKR/images/MightierMouse.gif
  6. ^'GuitarGeek'. Retrieved 23 July 2012.
  7. ^Ross, Michael (1998). Getting Great Guitar Sounds: A Non-Technical Approach to Shaping Your Personal Sound. Hal Leonard Corporation. p. 69. ISBN978-0-7935-9140-4. Retrieved 29 January 2012.
  8. ^Nels Cline. 'Tech Talk'. nelscline.com. Retrieved 29 January 2012.
  9. ^http://www.guitargeek.com/lawrence-chandler-bowery-electric-guitar-rig-and-gear-setup-1994/,
  10. ^Jim Berkenstadt; Charles R. Cross (2003). Nevermind: Nirvana. Music Sales Group. p. 81. ISBN978-0-8256-7286-6. Retrieved 29 January 2012.
  11. ^Charles H. Chapman (2001). Mel Bay Presents Interviews with the Jazz Greats-- and More. Mel Bay Publications. p. 24. ISBN978-0-7866-5946-3. Retrieved 29 January 2012.
  12. ^Cleveland, Barry. 'Bill Frisell'. Guitar Player. Retrieved 29 January 2012.
  13. ^Riis, Bjørn (18 April 2011). 'Tip of the week (11) – Overdrive and distortion'. Retrieved 4 February 2012.
  14. ^Cornish, Pete. 'David Gilmour's Pink Floyd 1994 Rig'. Retrieved 4 February 2012.
  15. ^Doyle, Tom (June 2011). 'FOO FIGHTERS: Recording Wasting Light'. Sound on Sound. Retrieved 29 January 2012.
  16. ^***Dale Turner (1999). 'Rockin' Grohl Hoochie Foo'. Guitar One.
  17. ^Jeff Kitts; Brad Tolinski (2002). Guitar World Presents One Hundred Greatest Guitarists of All Time from the Pages of Guitar World Magazine. Hal Leonard Corporation. p. 95. ISBN978-0-634-04619-3. Retrieved 29 January 2012.
  18. ^Pete Prown; Lisa Sharken (2003). Gear Secrets of the Guitar Legends: How to Sound Like Your Favorite Players. Hal Leonard Corporation. p. 55. ISBN978-0-87930-751-6. Retrieved 29 January 2012.
  19. ^'Kurt Rosenwinkel'. Guitar Player. Retrieved 29 January 2012.
  20. ^John Scofield. 'Equipment'. johnscofield.com. Retrieved 29 January 2012.
  21. ^Jeff Kitts; Brad Tolinski (2002). Guitar World Presents One Hundred Greatest Guitarists of All Time from the Pages of Guitar World Magazine. Hal Leonard Corporation. p. 99. ISBN978-0-634-04619-3. Retrieved 29 January 2012.
  22. ^Gill, Chris (1995). Guitar legends: the definitive guide to the world's greatest guitar players. Harper Perennial. p. 127. Retrieved 4 February 2012.
  23. ^Hunter, Dave (2011). The Rough Guide to Guitar. Penguin Books. p. 223. ISBN978-1-4053-8244-1. Retrieved 29 January 2012.
  24. ^Hunter, Dave (2011). The Rough Guide to Guitar. Penguin Books. p. 222. ISBN978-1-4053-8244-1. Retrieved 29 January 2012.
  25. ^'Fat Sound'.
  26. ^'Boris official Instagram'. Retrieved 15 January 2017.

External links[edit]

Retrieved from 'https://en.wikipedia.org/w/index.php?title=Pro_Co_RAT&oldid=897739757'
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    • Jun 2006
    • 5713
    You cannot date a RAT by the serial number. You have to open it up and look at the pots. I've been trying to sell my RAT for a while but have only really been getting trade offers, but I haven't put it up on ebay yet either. But if you look in my sig, there'll be a 7 digit number on the pots, like i have listed, 137 means CTS, the second two numbers indicate what year they were made, and the last two indicate the week of the year they were made.
    FWIW, I picked up my small box rat from guitar center for $50. generally speaking, though, they don't know that kinda stuff.

    Good info about dating a RAT based on the pot digits. Thanks.
    Gear & Stuff
    Captain in the SG Army, 101st Airborne Division
    Honorary Mention on bassesofalessergod's 'a list of jerks', 4/17/07
    Proud owner of The Legendary Orange IKEA Gorm Pedalboard

    Comment

    • Aug 2006
    • 4615
    Good one.
    Isn't he more the master of the daisy-chained Deluxe Memory Mans (at least in the early part of his career)? Call me 'Old School', but somehow, I don't see him ripping it up with a ProCo RAT.

    This has nothing to do with your query, but he used a Rat on the recording of 'Vertigo'.
    Carry on..

    Comment

    • Mar 2003
    • 43960
    they sell for a lot more than they're worth.. tonally it's worth about $50

    Comment

    • Aug 2007
    • 20392
    one-fiddy
    and buy your buddy dinner, take him on a man-date, and call it even.
    long, strong, and down to get the friction on...
    youtube.com/roccotanto (for pedal demos and stuff)
    magnatune.com/artists/lvxnova
    twitter: @bobbydevito

    Comment

    • Sep 2007
    • 7880
    Phil O'Keefe wrote:You can never have enough cheese, son. Write that down.gear.

    Comment

    • Jun 2006
    • 5713
    one-fiddy
    and buy your buddy dinner, take him on a man-date, and call it even.

    Best advice yet!
    Gear & Stuff
    Captain in the SG Army, 101st Airborne Division
    Honorary Mention on bassesofalessergod's 'a list of jerks', 4/17/07
    Proud owner of The Legendary Orange IKEA Gorm Pedalboard

    Comment

    • Oct 2002
    • 2871
    I think $150 is fair
    http://atlanta.craigslist.org/msg/1078188671.html
    ******For Sale*******ZVEX SHODanelctro Cool Cat Chorushttp://www.harmonycentral.com/t5/Effects/ZVEX-EQD-Tremolo-midi-pedal-etc/m-p/35322845#U35322845

    Comment

    • Jan 2008
    • 6680
    Sent from my iPhone
    Guitar:Fender Vintage Player 60's Strat
    Amp: Mesa Boogie Express 5:25 1x12 combo
    Originally Posted by SUPER VELCROBOY
    i made the thread so i can do whatever i want

    Comment

    • Jul 2005
    • 6742
    they sell for a lot more than they're worth.. tonally it's worth is priceless

    FIX'D
    good deals w/: RockDaJoJo, timmyo, rrancani, inscho, johnrambo, hangwire, mrweems, cleverbastid, mandooks, cantoXIII, Munchlaxatives, Shawn_Duggan, Parah Salin, RuggerHann, hazelwould, tommasters

    Comment

    • Aug 2007
    • 20392
    i would give him $150 and make my girlfriend flash him the boobies as a tip!
    long, strong, and down to get the friction on...
    youtube.com/roccotanto (for pedal demos and stuff)
    magnatune.com/artists/lvxnova
    twitter: @bobbydevito

    Comment

    • Nov 2005
    • 7595
    I probably wouldn't pay more than 150. Maybe a little more if i hadn't just found out the Edge used one.

    Comment

    • Nov 2005
    • 7595
    just buy the one the guy on here is offering for 150$.

    Comment

    • Jan 2008
    • 6680
    My original big box sounded MUCH better than my '91 Big Box RI. Supposedly it's the same circuit, etc...but they sounded different.
    Sent from my iPhone
    Guitar:Fender Vintage Player 60's Strat
    Amp: Mesa Boogie Express 5:25 1x12 combo
    Originally Posted by SUPER VELCROBOY
    i made the thread so i can do whatever i want

    Comment

    • Jun 2006
    • 5713
    Hey guys, I just e-mailed the seller a link to this thread while also offering him $150 for the pedal (he's already holding $70 in earnest money).
    Here's what he said: 'I
    Gear & Stuff
    Captain in the SG Army, 101st Airborne Division
    Honorary Mention on bassesofalessergod's 'a list of jerks', 4/17/07
    Proud owner of The Legendary Orange IKEA Gorm Pedalboard

    Comment

    • Jan 2003
    • 6627
    HA. Thanks buddy

    Comment

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