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BYOC Large Beaver PCB Instructions Manual

Version 2.0 with eq voicing switch
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B.Y.O.C Large Beaver Kit Instructions
Version 2.0 with EQ Voicing Switch
Parts Checklist
Populating the Circuit Board (Triangle specs)
Populating the Circuit Board (Ram's Head specs)
Populating the Circuit Board (Pickled Beaver specs)
Installing the Rotary Switch, Potiometers, & LED
Assembly
Wiring
Installing the Transistors, Finishing up & Troubleshooing
Schematic
©2008 Buildyourownclone, LLC
page 2 - 3
page 5 - 8
page 9 - 13
page 14 - 18
page 19 - 21
page 22 - 23
page 24
page 25 - 26
page 27 -30

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Summary of Contents for BYOC Large Beaver PCB

  • Page 1 B.Y.O.C Large Beaver Kit Instructions Version 2.0 with EQ Voicing Switch Parts Checklist page 2 - 3 Populating the Circuit Board (Triangle specs) page 5 - 8 Populating the Circuit Board (Ram's Head specs) page 9 - 13 Populating the Circuit Board (Pickled Beaver specs) page 14 - 18 Installing the Rotary Switch, Potiometers, &...
  • Page 2 B.Y.O.C. Large Beaver Parts Checklist Resistors: 2 x 100ohm (brown/black/black/black/brown) 1 x 120ohm (brown/red/black/black/brown) don't confuse this one with the 10K!!!!! 2 x 150ohm (brown/green/black/black/brown) 2 x 820ohm (gray/red/black/black/brown) NOT INCLUDED IN KITS PURCHASED AFTER 6/1/08 1 x 1k (brown/black/black/brown/brown) 1 x 2.7k (red/purple/black/brown/brown) 1 x 3.3k (orange/orange/ black/brown/brown) 1 x 4.7k (yellow/purple/black/brown/brown)
  • Page 3 1 x B100k tone 3 x extra pot washers and nuts to be used as spacers (only with PCB mounted pots) Hardware: 1 - b.y.o.c. ready to solder Large Beaver PCB 1 - predrilled enclosure w/screws 1 x 3pole 4position rotary switch...
  • Page 4 2 x .0033uf film (332 or 3n3) 2 x .047uf fim (473 or 47n) (OR .05 Ceramic disc) 2 x 1uf aluminum electrolytic 1 x 330uf aluminum electrolytic Semi-conductors: 1 x 1N4001 diode (black with silver stripe) 1 x 14 pin Quad transistor array chip (THAT300, MPQ3904, ect) 1 x DIP14 IC socket ©2008 B.Y.O.C., LLC...
  • Page 5 Populating the Circuit board (Triangle Versions 1 & 2) KITS PURCHASED AFTER 6/1/08 NO LONGER COME WITH PARTS TO BUILD TO TRIANLGE VERSION 2 SPECS Q1 - Q4: BC239C (2N5133 version2) R1: 100 ohms (820 ohms version 2) R2: 22k R3: 82k R4: 1M R5: 33k...
  • Page 6 Step 1: Install the 1N914 (small orange glass) diodes. Make sure the end with the black stripe (cathode) lines up with the striped side on the PCB layout. Save the left over lead clippings for the next step. Step 2: Jumper the 100ohm resistor space with a left over piece of lead clippings from the diodes you just installed.
  • Page 7 Step 3: Install the resistors. Resistors are not polarized and can be inserted into the PCB in either direction. If you are building to Triangle Version 2 specs, use the 820ohm resistors in the R1 and R15 positions. Step 4: Install the transistor sockets. Be sure to line the tabs on the sides of the sockets up with the outline of the sockes on the PCB layout.
  • Page 8 Step 5: Add all the metal film capacitors. Metal film capacitors are not polarized and can be inserted into the PCB in either direction. Step 6: Add all the ceramic disc capacitors. Ceramic disc capacitors are not polarized and can be inserted into the PCB in either direction.
  • Page 9 Populating the Circuit board (Ram's Head Specs) Q1 - Q4: BC239C R1: 120 ohms (make sure this isn't a 10k resistors!!!) R2: 10k R3: 47k R4: 1M R5: 39k R6: 470k R7: 10k R8: 150 ohms R9: 470k R10: 10k R11: 100k R12: 1k R13: 22k...
  • Page 10 Step 1: Install the 1N914 (small orange glass) diodes. Make sure the end with the black stripe (cathode) lines up with the striped side on the PCB layout. Save the left over lead clippings for the next step. Step 2: Jumper the 100ohm resistor space with a left over piece of lead clippings from the diodes you just installed.
  • Page 11 Step 3: Install the resistors. Resistors are not polarized and can be inserted into the PCB in either direction. Step 4: Install the transistor sockets. Be sure to line the tabs on the sides of the sockets up with the outline of the sockes on the PCB layout. KIT PURCHASED AFTER 6/1/08 WILL NOT HAVE TRANSISTOR SOCKETS.
  • Page 12 Step 5: Add all the metal film capacitors. Metal film capacitors are not polarized and can be inserted into the PCB in either direction. Step 6: Add all the ceramic disc capacitors. Ceramic disc capacitors are not polarized and can be inserted into the PCB in either direction.
  • Page 13 Step 7: Add all the aluminum electrolytic capacitors. These are polarized and it is very important that you have the positive and negative ends correctly oriented. Follow the diagram above. The negative end of your aluminum electrolytic capacitors will have a black stripe down one side and the lead will be the shorter of the two.
  • Page 14 Populating the Circuit board (Pickled Beaver Specs) IC1: 14 pin NPN Quad Transistor Array R1: 100 ohms R2: 15k R3: 100k R4: 1M R5: 33k R6: 470k R7: 10k R8: 100 ohms R9: 470k R10: 15k R11: 100k R12: 1k R13: 22k R14: 33k R15: 100...
  • Page 15 Step 1: Install the 1N914 (small orange glass) diodes. Make sure the end with the black stripe (cathode) lines up with the striped side on the PCB layout. Save the left over lead clippings for the next step. Step 2: Install the resistors. Resistors are not polarized and can be inserted into the PCB in either direction.
  • Page 16 Step 3: Install the 1N4001 (larger black diode with white stripe). Make sure the end with the white stripe (cathode) matches up with the striped side on the PCB layout. Step 4: Install the IC socket. Be sure to line notched end of the socket with the notched end of the layout on the PCB.
  • Page 17 Step 5: Add all the metal film capacitors. Metal film capacitors are not polarized and can be inserted into the PCB in either direction. Step 6: Add all the ceramic disc capacitors. Ceramic disc capacitors are not polarized and can be inserted into the PCB in either direction.
  • Page 18 Step 7: Add all the aluminum electrolytic capacitors. These are polarized and it is very important that you have the positive and negative ends correctly oriented. Follow the diagram above. The negative end of your aluminum electrolytic capacitors will have a black stripe down one side and the lead will be the shorter of the two.
  • Page 19 Installing the Rotary Switch, Pots, and LED Instructions are the same for all versions from this poit on! The rotary switch that comes with your Large Beaver kit is a 3 pole 4 position rotary switch. The 3 poles are labelled A, B, and C. The 12 throws (4 x 3) are labelled 1 - 12. Throws 1 - 4 belong to pole A.
  • Page 20 On the front of you rotary switch is a washer. And this washer has a notch on it. This washer limits the number of positions you can turn your rotary switch to by placing the washer's notch in the appropriately numbered hole. We want to set our switch for 4 positions so we want to put the washer's notch into hole #4.
  • Page 21 This diagram is an exploded view. It would imply that you should mount the pots and switch first and then install and solder the PCB, but it is acutally easier if you solder the pots and switch to the PCB first and then mount the assebly to the enclosure.
  • Page 22 Assembly NOTE: If you have already mounted/soldered your PC mounted pots, ignore the parts of the assembly portion of the instructions. This is only for kits that have solder lug pots. 1. Install the jacks first. If you are looking down inside the enclosure, the mono jack goes on the right side and the stereo jack goes on the left.
  • Page 23 This is a disconnect ac adaptor jack. That means that when you have a battery connected and you plug in the adaptor, it will disconnect the battery. That is why there are 2 positive terminals. They are both connected when there is no plug in the jack, but when the plug is inserted only one of the terminals (the uppermost terminal in the back view ) is connected to the sleeve of the adaptor.
  • Page 24 Wiring NOTE: You do not need to wire the PC mounted pots like this. Only if you have solder lugged pots. Finish this step and go back to Step 3: Installing the Rotary switch, Pots, and LED.
  • Page 25 , cheap enough, and readily available at the time. This is the opinion of BYOC. We do not claim this to be a verified truth. But we did pull some FS36999's from actual vintage Triangle version 1 muffs and their gain and tonal characteristics are nearly identical to the BC239C.

  • Page 26: Troubleshooting

    2 and then come back to it with a fresh pair of eyes. Then the problem usually jumps right out at you .usually. If you still can t get it working, start a thread on the BYOC forum and ask for help. board.buildyourownclone.com...