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StewMac TWO KINGS BOOST DOUBLE-POWERED ROYAL TONE Instruction Manual

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TWO KINGS BOOST
DOUBLE-POWERED ROYAL TONE
INSTRUCTION GUIDE
1

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Summary of Contents for StewMac TWO KINGS BOOST DOUBLE-POWERED ROYAL TONE

  • Page 1 TWO KINGS BOOST DOUBLE-POWERED ROYAL TONE INSTRUCTION GUIDE...
  • Page 2 Even if you’re a complete beginner don’t worry! We go over everything from unboxing, to choosing the right soldering iron, to making every connection. We also give tips on painting your pedal. Visit: stewmac.com/pedal-build...

  • Page 3: Tools And Supplies

    Not pictured: #1 Phillips screwdriver, TOOLS AND SUPPLIES and supplies to paint your pedal, clear (REQUIRED OR RECOMMENDED) silicone adhesive, spray finish. Soldering Iron #0502 Solder Wick #0504 PC Board Holder #0500 Power: Model 12251 requires a Solder #0505 standard 9V DC center-negative power supply (not included) and consumes less than 100mA.
  • Page 4 TOOLS AND SUPPLIES (HELPFUL) Magnifying glass or OptiVISOR #1685 Multimeter PM16B #3607 Our Pedal Building Tool Set #2318 is the perfect companion for new pedal builders who do not already have a lot of tools and supplies. Soldering Aids #0521...

  • Page 5: Parts List

    We know you are excited to get started building. PARTS LIST Note: While electrical properties That said, one of the keys to a successful build, is remain the same, the appearance of taking the time to get to know all of your parts. Sort parts may vary based on availability.

  • Page 6: Parts List (Cont)

    PARTS LIST (CONT) 10nF capacitor (8) 1N914 rectifier diode (8) #7331 #7521 1N5817 rectifier diode (3) .1µF capacitor (2) #7522 #7304 1N4001(1S1588) rectifier diode (4) 1µF capacitor (2) #101259 #7308 100pF capacitor (2) 1µF capacitor (2) #100721 1u F #7314 22nF capacitor (2) 10µF capacitor (3) #7332...
  • Page 7 PARTS LIST (CONT) 8-pin DIP switch (1) White LED (1) #100779 #7422 Red LED (1) Control knobs (6) #7421 #7501 5mm LED mounting bezel (2) B25K linear taper pot (2) #7432 #7461 A100K linear taper pot (2) #7455 TC1044 SCPA voltage regulator (1) B100K Linear taper pot (2) #100732 #7453...
  • Page 8 PARTS LIST (CONT) 1/4" mono jack (1) 24" of lead wire - 22 gauge (1) #4652 (Two for Kit #12251) #5960 Battery clip (1) #1225 1/4" Stereo jack (1) (Only for kit #12255) (Only for Kit #12255) #4653 Sticker sheet (1) 2.1mm DC power connector (1) #7468 (Only for kit #12251)
  • Page 9 (or custom decals that you can create on your own). Doing this pre-build is not only fun, but it’s much easier than disassembling the pedal to paint it once you put it together. Don’t PAINTING forget to order quality primer and lacquers from stewmac.com. YOUR PEDAL HOUSING 1.
  • Page 10 UNDERSTANDING ELECTRONIC Band 1 Band 2 Band 3 Multiplier Tolerance COMPONENTS BLACK BROWN +/- 1% A number of different components are used to make an +/- 2% ORANGE 1,000 effects pedal. Here’s an overview of what they do.. YELLOW 10,000 GREEN 100,000 +/- 0.5%...
  • Page 11 CAPACITORS Resistors and capacitors may also be referred to with The two main uses of capacitors are to store electricity shorthand notation on the printed circuit board when and to block the flow of DC current. there is a decimal in the value. For example, the place on the board for the 4.7K resistor will read 4K7 and the Capacitor values are typically printed on the spot for a 2.2nF capacitor will read 2n2.
  • Page 12 INTEGRATED CIRCUITS UNDERSTANDING ELECTRONIC TL072CP Integrated circuits are COMPONENTS (CONT) TL072CP low noise complex, tiny, self-contained op-amp (1) #7444 collections of components DIODES that contain a complete Diodes are used where you want electricity to flow in circuit. Op-amps, audio only one direction, such as power rectification, and processors, and linear also to limit how much current can flow, to create...
  • Page 13 changes in volume in a linear fashion as you might POTENTIOMETER A potentiometer, or pot, is a variable expect. As the volume increases, a greater change resistor. This means as the knob shaft is in signal or sound-pressure is required to perceive a rotated, the DC resistance will change.
  • Page 14 SOLDERING The solder joints you’ll make on the circuit boards Here’s a few more are very small, and too much heat can damage the soldering tips that board. The idea is to make joints quickly, without scorching the holes. might be helpful: •...
  • Page 15 Free the printed circuit board (PCB) and breakout board from the frame by cutting the small tabs with a string cutter or side cutter. Insert the diode leads through the component side (the side with the components’ values and outlines silkscreened in white). In many cases, INSTALL 15 components must be inserted in a specific direction due to polarity, so follow the graphics DIODES...
  • Page 16 Next, we’re going to add a bunch of resisitors to our PCB. Like in the previous step, you’ll find an outline of each resistor and its value printed in their proper location on the PCB. Resistors are not polarized, so it doesn’t matter which lead goes in which hole. Match INSTALL 26 resistors to the values on the PCB, a few at a time, and solder in place.
  • Page 17 It’s a great practice to always check your resistors on a multimeter to be sure they display the correct ohms before installing. In rare cases, a resistor might be labeled incorrectly or could be an open circuit and you wouldn’t want to find that out post install! 1K resistor (2) OPTIONAL #7357...
  • Page 18 Installing low profile components that sit closer to the board now, will make installing taller 101J INSTALL 26 components easier later on. 100V RESISTORS 220K resistor (2) 27K resistor (2) #7381 #7398 Black Orange Brown Violet Black Brown 1M resistor (6) 33K resistor (2) #7367 #7409...
  • Page 19 Each side of the pedal has its own gain, tone, and volume controls. In addition, the internal trim pot allows the user to adjust the high frequency response. This control is labeled “presence” and impacts the higher harmonics. This is useful when the player wants to take a bit of “the INSTALL 2 sharp edge”...
  • Page 20 The DIP switch you’re about to install allows the user to customize tone when its four switches are arranged in different combinations. The four switches engage two different groups of diodes that affect not only the overall distortion type, but also the sustain and response to pick attack INSTALL of the pedal.
  • Page 21 Next, carefully snap three integrated circuit (IC) sockets onto the PCB. Make sure the u-shaped cutout matches the one on the PCB and that ALL of the legs have penetrated the PCB and none have folded under “U” cutout the part. Flip over the PCB and solder all of the sockets. Once cool, INSTALL IC SOCKETS install the piggybacking charge pump and op-amp chips by snapping...
  • Page 22 The three types of capacitors shown below are polarized and have to be installed in the correct orientation. Note the stripe running the length of each cap; this identifies the negative (minus) lead. On the circuit board, the circle for this cap’s location has a round INSTALL 6 through hole on one side, and a square through hole on the other: insert the capacitors with POLARIZED...
  • Page 23 The remaining capacitors below are not polarized. However, best practice 1J63 is to solder these caps in place with all INSTALL 16 text facing the same direction. CAPACITORS .1J63 100pF capacitor (2) .1µF capacitor (2) #100721 #7304 22nF capacitor (2) #7332 1µF capacitor (2) #7308...
  • Page 24 LEAD WIRES This kit comes with 24" of lead wire. Cut the wire into six, 2" sections and nine 1" sections. Strip around 3/32" off both ends of all wires with StewMac’s PCB .6mm/22gauge stripper. Holder (#0500) is perfect for soldering The 2"...
  • Page 25 503 0D 503 0D .1J63 .1J63 SOLDER BREAKOUT BOARD TO THE PCB Align the PCB and breakout board component side up. Guide the leads of the wires coming from the PCB through the holes in the breakout board. Now tape the leads to the breakout board on the component side to prevent them from slipping out of the holes.
  • Page 26 Locate the six pots. If Protect your painted housing by any pot has an index pin laying a piece of paper or light protruding from it, break cardboard with holes in it for the pots it off with a pair of needle and footswitch on the housing before nose pliers.
  • Page 27 SOLDER POTS TO PCB Temporarily attaching the pots and footswitch to the pedal housing will help to keep things steady for soldering them to the PCB. Lay the PCB/breakout board component side up over the pots. The shaft of the footswitch will help to support the PCB.
  • Page 28 Exactly like we did is step 11, we’re going to use our housing to help with attaching the footswitch. ATTACH THE FOOT SWITCH TO THE Insert the threaded shaft of the BREAKOUT footswitch into the OUTSIDE of BOARD the housing and reattach the nut and washer in the INSIDE.
  • Page 29 WD 14 With the PCB/breakout board, pots and footswitch assembled and free from the temporary workspace on the outside of the pedal housing, it’s time prep the battery clip connection. With the component side of the PCB board group facing up (breakout board should be in the lower left position), thread the two ends of...
  • Page 30 Like some of the caps and diodes, the LED is polarized and has to be installed in a specific INSTALL direction. The negative lead of the diode has a flat 2 LED edge and is shorter than the positive.  INDICATOR LIGHTS The LED mounting bezel consists of two main parts: A ring that case...
  • Page 31 WD 16 Remove the nuts and washers again from the pots and of the pots and footswitch are in their 16 16 103J100 footswitch and lay the pedal housing face down. With holes, reattach the washers and nuts 1J63 1J63 the component side of the PCB group facing up, thread for the last time (promise).
  • Page 32 WD 17-1 PLEASE NOTE: The DC jack and input jack are different for models 12251 and 12255, so choose INSTALL THE step 17-20 according to your model. DC JACK FOR MODEL 12255 (with battery Remove the nut and insert the DC option) jack into the top of the housing.
  • Page 33 Model 12255 has the ability to run on either 9 Volt battery or an external power supply. The included stereo input jack acts as a switch for the battery if it is in place so that you do not drain power unless a cable is plugged in. Insert the input jack into the left side of the housing INSTALL THE with the tip connection facing down, as shown in the diagram.
  • Page 34 WD 19-1 INSTALL THE DC JACK FOR MODEL 12251 (DC only) Insert the DC jack into the top of the housing making WD 19-2 sure the longer of the two lugs is on the left. Using a 14mm wrench or needle nose pliers and 14mm nut, secure jack into housing just enough to allow the jack to rotate.
  • Page 35 Model 12251 comes with two mono jacks. One will be your input jack and the other your output jack. SLEEVE INSTALL THE Insert the jack into the left side of INPUT JACK the housing with the tip connection facing up, as shown in the diagram. FOR MODEL 12251 Add the washer and thread the nut...

  • Page 36: Output Jack

    Insert the output jack into the right side of the housing with SLEEVE the tip connection facing down, INSTALL THE as shown in the diagram. Add OUTPUT JACK the washer and thread the nut on to the shaft enough so that the pot can rotate freely. You may need to rotate the jack to provide easier access SLEEVE to setting the solder joints.
  • Page 37 COMPLETED VIEW (with battery option ) With the output jack secured, this is what your pedal should 1J63 1J63 look like. TC1044SCPA 503 0D 503 0D .1J63 Congrats, on a job well done! .1J63 Now, simply attach the back of the pedal, pop on the knobs, plug this thing in and bend some tone!
  • Page 38 8-pin DIP Switch ( #100779 TRIM POTS ADJUSTMENTS The default trim pot setting is all the way to the left. To adjust high FINE TUNING frequency shaping to your liking, 503 0D 503 0D DIP SWITCHES turn the screw to the right and AND TRIM set to your personal taste.
  • Page 39 HERE’S HOW THE CONTROLS WORK POWER Use a standard 9 volt DC power supply with a 2.1mm negative-center barrel OUTPUT INPUT 9V DC (not included). We always recommend pedal- specific, transformer-isolated, wall-wart power supplies or supplies with separate isolated outputs. Some switching supplies, as well as some linear (non-switching) pedal power supplies can be noisy.

  • Page 40: Technical Support

    TECHNICAL SUPPORT: If you have any questions before, during, or after your build, please reach out to our Tech Support Team by email at service@stewmac.com or by phone M-F 9:00AM-5:00PM at 1-800-848-2273. stewmac.com ©2022 StewMac. All rights reserved. • #12251/#12255 Updated July, 2022...

This manual is also suitable for:

12251