background image

 

GCI BRUTALIST JR. BUILD GUIDE 

The Brutalist Jr. is the DIY little brother to the GCI Brutalist, a high powered distortion pedal loosely based on the Providence 
Stampede SDT-1.  It runs on 9v DC power or 9v battery and has controls for volume, loudness (a high and low boost chained into 
one control), and gain (distortion.)  Components have been carefully chosen to provide a powerful distorted sound when placed in 
front of a semi-clean tube amp, but please feel free to experiment with component choices.  Alternate resistors, capacitors, and 
diodes can change the tonal and gain characteristics of the circuit.  External switches can be added to make these choices 
switchable.   

If you are inexperienced with soldering, please watch YouTube tutoritals and get comfortable with “tinning” wire ends and making 
solder connections to PCBs and pots before beginning this build. 

This kit is designed was designed and prototyped in the USA.  Consequently, these instructions are in English units.  Apologies to 
any non-US builders who need to convert to metric from this antiquated system. 

If you enjoy building this kit and find it useful, please show us your work by tagging 

www.facebook.com/KurtBallou/

 or 

www.instagram.com/godcitymusic/

 and use the hashtags #godcityinstruments and #brutalistjr.

 

Содержание Brutalist Jr.

Страница 1: ...iodes can change the tonal and gain characteristics of the circuit External switches can be added to make these choices switchable If you are inexperienced with soldering please watch YouTube tutorita...

Страница 2: ...commerce com kit the gc brutalist jr MODS At the end of this build guide is a section of suggested mods Remember to add components for desired mods when ordering parts For mods which require additiona...

Страница 3: ...120R Brown Red Black Black Brown C8 27n 273 Diodes DISTORTION A50K R7 2 2k Red Red Black Brown Brown C9 300p 301 Part Value LOUDNESS B1M R8 2 2k Red Red Black Brown Brown C10 270p 271 D1 1n914 VOLUME...

Страница 4: ...at and phillips head screw drivers Enclosure 1 125BB Needle nose pliers Battery snap 1 6 24 leads Side cutters DC jack 1 2 1mm Wire strippers LED 1 5mm Red Pliers or socket set LED bezel 1 Black Hand...

Страница 5: ...GETTING STARTED Sort and clearly identify all components and hardware Be sure not to lose anything because the kit does not include any extras...

Страница 6: ...Resistors can be identified with a multi meter or by using this online calculator http www digikey com en resources conversion calculators conversion calculator resistor color code 5 band...

Страница 7: ...Capacitors can be identified by using this online calculator http www electronics2000 co uk calc capacitor code calculator php and this online conversion table http www justradios com uFnFpF html...

Страница 8: ...s completed this side will still be visible when the back of the enclosure is removed These instructions refer to the face of the pedal enclosure where the knobs and switches are as the front side and...

Страница 9: ...front side of the PCB The 1N5818 goes in the D3 slot and the 1N914s go in the D1 and D2 slots Be sure to match the end of the diode with the stripe to the stripe on the PCB next to the square pad Pro...

Страница 10: ......

Страница 11: ......

Страница 12: ......

Страница 13: ......

Страница 14: ...bend the legs at the resistor bodies to 90 degrees and insert them into the PCB from the front side Then from the back side bend their legs out to hold them in place until it s time to solder Solder...

Страница 15: ......

Страница 16: ......

Страница 17: ...the back side bend their legs out to hold them in place until they are soldered The notch in the sockets should align with the notches screen printed on the PCB There will be notches or dots on the I...

Страница 18: ......

Страница 19: ...itical Sort the capacitors and one by one insert them to the PCB from the front side Then from the back side bend their legs out to hold them in place until it s time to solder Solder all capacitors a...

Страница 20: ......

Страница 21: ...have a shorter lead and a stripe running along the side of the cap and goes into the round solder pad Sort the capacitors then one by one insert them to the PCB from the front side Then from the back...

Страница 22: ......

Страница 23: ...n the enclosure properly with these tabs still attached Identify each pot at label each with a V L and D for Volume Loudness and Distortion to ensure they don t get put into the enclosure or board in...

Страница 24: ......

Страница 25: ...ENCLOSURE Step 1 Print the paper drill template PDF at 1 1 and attach it to the enclosure as described on the drill template You may find it helpful to tape the template in place before center punchin...

Страница 26: ......

Страница 27: ...Step 2 Put on work gloves Step 3 Use a center punch or sharp nail and hammer to create divots at the center points of the holes Remove but do not discard paper template...

Страница 28: ...Step 4 Drill using the divots as starting points to ensure that the drill doesn t walk off center Brace the enclosure while drilling to prevent the enclosure from spinning around if the drill catches...

Страница 29: ......

Страница 30: ...Step 5 Use a countersink if necessary to de burr the holes Step 6 Add paint labeling and or artwork...

Страница 31: ...pliers or appropriate size socket Step 1 Install the potentiometers into the enclosure from the back inside Pin 3 see diagram below of the potentiometer should be toward the left with all 3 pins faci...

Страница 32: ......

Страница 33: ...gh the positive hole on it Once the legs are through bend the leads together so that they are 90 degrees from their original position Next solder a 2 5 section of red wire to the long leg close to the...

Страница 34: ......

Страница 35: ......

Страница 36: ......

Страница 37: ...stic threads could strip Step 4 Install the 3pdt footswitch Orientation is important There will be a notch in the threads of the switch This notch should point at the potentiometers Also the solder ta...

Страница 38: ...will be the input jack and will go to the left when looking at the back of the enclosure This jack has 3 solder tabs The mono jack will be the output jack and will go to right when looking at the bac...

Страница 39: ...be soldered into the back side of the PCB as this wire will run underneath the PCB on its way to the footswitch Using wire strippers strip approximately of shielding off of one end of the wire and ti...

Страница 40: ......

Страница 41: ......

Страница 42: ...m in place PCB should be oriented such that the Kurt Ballou side with all the components faces out When properly installed all 3 pins of each potentiometer should pass through the PCB There is no need...

Страница 43: ......

Страница 44: ...the wires tight during this process as this will put tension on the solder joints and lead to potential failure of the connection After the wire is trimmed to an appropriate length using wire stripper...

Страница 45: ......

Страница 46: ......

Страница 47: ...all set screw that will need to be tightened with a small flathead screw driver in order to properly operate the potentiometer Step 10 TEST If all the instructions were followed and soldering was done...

Страница 48: ...um and Schottky diodes have the lowest clipping threshold and will result in the least amount of overall volume Mismatching the types of diodes in D1 and D2 creates asymmetric clipping different clipp...

Страница 49: ...for bass guitar or provide a scooped effect to the EQ on guitar C7 can be used to lower the overall bass level Decreasing the value will decrease the overall bass response Increasing it will increase...

Страница 50: ...WIRING DIAGRAM...

Страница 51: ......

Отзывы: