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BYOC FET PreAmp Kit Instructions Manual

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Build Your Own Clone
FET PreAmp
Kit Instructions
Warranty:
BYOC, LLC guarantees that your kit will be complete and that all parts and components
will arrive as described, functioning and free of defect. Soldering, clipping, cutting,
stripping, or using any of the components in any way voids this guarantee. BYOC, LLC
guarantees that the instructions for your kit will be free of any majors errors that would
cause you to permanently damage any components in your kit, but does not guarantee
that the instructions will be free of typos or minor errors. BYOC, LLC does not
warranty the completed pedal as a whole functioning unit nor do we warranty any of the
individual parts once they have been used. If you have a component that is used, but
feel it was defective prior to you using it, we reserve the right to determine whether or
not the component was faulty upon arrival. Please direct all warranty issues to:
sales@buildyourownclone.com This would include any missing parts issues.
Return:
BYOC, LLC accepts returns and exchanges on all products for any reason, as long as
they are unused. We do not accept partial kit returns. Returns and exchanges are for the
full purchase price less the cost of shipping and/or any promotional pricing. Return
shipping is the customers responsiblity. This responsibility not only includes the cost of
shipping, but accountability of deliver as well. Please contact
sales@buildyourownclone.com to receieve a return authorization before mailing.

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Summary of Contents for BYOC FET PreAmp Kit

  • Page 1 Kit Instructions Warranty: BYOC, LLC guarantees that your kit will be complete and that all parts and components will arrive as described, functioning and free of defect. Soldering, clipping, cutting, stripping, or using any of the components in any way voids this guarantee. BYOC, LLC...
  • Page 2 That being said, we will do our best to help you as much as we can. Our philosophy at BYOC is that we will help you only as much as you are willing to help yourself. We have a wonderful and friendly DIY discussion forum with an entire section devoted to the technical support and modifications of BYOC kits.

  • Page 3: Table Of Contents

    FET PreAmp KIT INSTRUCTION INDEX Parts Checklist ....page 4 - 5 Populating the Circuit Board ....page 6 - 16 Main PCB Assembly .........page 17 - 20 Wiring................page 21 - 25 Installing the IC's and Finishing Up.......page 26 Operation Overview..........page 27...

  • Page 4: Parts Checklist

    Parts Checklist for BYOC FET PreAmp Kit Resistors: 1 - 470ohm (yellow/purple/black/black/brown) 1 - 4k7 (yellow/purple/black/brown/brown) 1 - 6k8 (blue/gray/black/brown/brown) 2 - 8k2 (gray/red/black/brown/brown) 3 - 10k (brown/black/black/red/brown) 2 - 15k (brown/green/black/red/brown) 1 - 22k (red/red/black/red/brown) 1 - 33k (orange/orange/black/red/brown)
  • Page 5 2 - B50k linear (BASS & TREBLE) Hardware: 1 - SPDT Toggle Switch 1 - drilled enclosure w/ 4 screws 1 - byoc FET PreAmp PCB 1 - 3PDT footswitch 3 - knobs 1 - DC adapter jack 1 - ¼ mono jack 1 - ¼...

  • Page 9: Populating The Circuit Board

    Populating the Circuit Board STEP 1: Add the resistors . Resistors are not polarized, so it does not matter which end goes in which solder pad. Take your time and be sure not to confuse similarly banded resistors such as the 470ohm with the 470k. This is a very common mistake.
  • Page 10 STEP 2: Add the 8 pin IC sockets. ONLY SOLDER THE SOCKET! NOT THE ACTUAL IC! This is a socket. The sockets get soldered to the PCB. The ICs get inserted into the sockets. The actual IC chip itself, never gets soldered. You will insert the IC into the socket after the entire pedal has been built.
  • Page 11 Step 3: Add the Transistor. Be sure to orient the transistors so that the flat side of the tansistor body matches up with the flat side on the PCB layout.
  • Page 12 Step 4: Add the filmcapacitors. Film caps are not polarized and can be inserted into the pcb in either direction.
  • Page 13 Step 5: Add the ceramic disc capacitors. These are not polarized and can be inserted into the PCB either way.
  • Page 14 STEP 6: Add the aluminum electrolytic capacitors. These are polarized. The positive end will have a longer lead and should go in the square solder pad. The negative end will have a shorter lead with a black or white stripe running down the body of the capacitor.
  • Page 15 Step 7: Add the battery snap. Thread the solder ends of the battery snap into the strain relief holes from the bottom solderside of the PCB and out through the top. Insert the solder ends of the battery snap wires into the topside of their respective solder pads. Solder on the bottom side of the PCB.
  • Page 16 Step 8: Add wires to the IN, OUT, RING, and two Ground eyelets. Start by cutting four 2.5 pieces of wire and one 1.5 piece of wire. Strip 1/4 off each end and tin the ends. Tinning means to apply some solder to the stripped ends of the wires. This keeps the strands from fraying and primes the wire for soldering.

  • Page 17: Main Pcb Assembly

    Main PCB Assembly Step 1: Mount the DC adapter jack to the enclosure.
  • Page 18 Step 2: Connect the TIP (negative) terminal of the DC adaptor jack to the eyelet on the PCB with 2 inches of hook up wire. Connect the SLEEVE of the DC adaptor jack to the eyelet on the far right side of the PCB with 2 inches of hook up wire.
  • Page 19 Step 3: Flip the PCB over so that the bottom or solder side is up. Insert the A1M (VOLUME), B50k (BASS), and B50k (TREBLE) potentiometers, SPDT Toggle switch, and the LED into the bottom side of the PCB. DO NOT SOLDER ANYTHING YET!!! The LED will have one lead that is longer than the other.
  • Page 20 Step 4: Hold the PCB in one hand so that the component side of the PCB is in the palm of your hand and the bottom side with the pots, toggle switch and LED is facing up. Now use your other hand to guide the predrilled enclosure onto the PCB assembly so that the pots and LED all go into their respective holes.

  • Page 21: Wiring

    Wiring Stereo (input) Jack Mono (output) Jack Step 1: Install the 1/4 jacks to the enclosure.
  • Page 22 Step 2: Install the footswitch. Orient the footswitch so that the flat sides of the solder lugs are like the diagram below. NOTE: There are no actual number markings on the footswitch. There are two correct ways you can orient the footswitch. They are both 180 degrees of each other.
  • Page 24 Step 3: Connect the pre stripped and tinned wires to the 1/4 jacks. Step 4: · Cut 4 x 3/4 pieces of wire. Strip 1/8 off each end. These will be used to connect lugs/eyelets 1, 2, 7, & 8 ·...
  • Page 25 · Cut 3 x 2 pieces of wire. Strip 1/4 off each end. These will be used to connect the tip and sleeve of the IN jack and the tip of the OUT jack to the PCB. · Cut 1 x 1.5 peice of wire. Strip 1/4 off each end. This will be used to connect the ring of the IN jack to the ring eyelet on the PCB.

  • Page 26: Installing The Ic's And Finishing Up

    Installing the IC's and Finishing Up Note that the HA1457W does not have a pin #2. Orient the chips and insert them into their sockets so that PIN #1 goes into the space highlighted in RED.

  • Page 27: Operation Overview

    Operating Overview VOLUME, BASS, & TREBLE: Hopefully, you don't need an explaination of how these knobs work and what they do. One thing that is not obvious however, is the fact that you can increase the midrange frequencies by cutting both the treble and bass at the same time. And inversely, you can decrease the midrange frequencies by boosting the treble and bass.
  • Page 29 For hi res schematic go to: www.buildyourownclone.com/fetscheme.pdf Please visit http://buildyourownclone.com/board for any technical support For HA1457W datasheet go to: http://buildyourownclone.com/ha1457.pdf For 2SK246 datasheet go to: http://www.buildyourownclone.com/2sk246.pdf copyright 2011 BYOC, Inc.