Kit sold out from Death By Audio. All parts must be self-sourced. The official BOM and Build Guide PDFs are available at killerrockandroll.com/deathbyaudio/ — read the full build guide before ordering anything.
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## OVERVIEW
This document covers sourcing all components for the DBA/APTBS **SYNTHESIZER** PCB in New Zealand, organised by supplier tier from most local to international. Order the AliExpress parts **first** — they take the longest.
The board uses a standard guitar pedal power supply: **2.1mm centre negative, 9V DC**.
[ 01 ] TIER 1 — JAYCAR NZ
Walk-in or click & collect from Christchurch. These are standard passives and common ICs that Jaycar reliably stocks. Do this run first — it covers the bulk of the part count.
PARTS
NOTES
Resistors (all values 220Ω → 1MΩ)
Individual value packs or bulk assortment kit. 1/4W axial, ~7.5mm pitch.
Ceramic Capacitors (22pF → 105)
Radial, ~5mm pad pitch. Check Jaycar code-to-value chart.
Electrolytic Capacitors (1µF → 100µF, 25V)
Radial polarised, ~1.8mm pitch. 2.2µF and 3.3µF are interchangeable per build guide.
1N4148 ×2, 1N4001 ×3 Diodes
Standard DO-35 / DO-41 axial diodes. Stock items.
2N3904 ×2, 2N3906 ×1, BC550 ×1
TO-92 transistors. Mind pinout — CBE vs EBC orientation matters.
TL072P ×3
Dual op-amp, DIP-8. Common stock.
LM324N ×2
Quad op-amp, DIP-14.
LM741P ×1
Can be swapped with UA741.
LM386N-1 ×1
Low voltage audio power amp, DIP-8.
78L05Z ×1
TO-92 voltage regulator. May be labelled 78L05 or L78L05.
LEDs (5mm red) ×3
Standard 5mm. Mind polarity — flat side to board marking.
IC Sockets (8-pin ×6, 14-pin ×3, 16-pin ×2)
DIP sockets, 2.54mm pitch. ALWAYS socket your ICs.
SPDT Toggle Switches ×5
ON-ON, panel/PCB mount. Check leg clearance for flat lay.
DC Barrel Jack ×1
2.1mm standard. Part ref: 163-179PH-EX.
Jaycar's standard potentiometers are 24mm upright types. The BOM requires 16mm RIGHT-ANGLE PCB/panel mount pots. Verify shaft type and pin spacing before purchasing — check Jaycar's 9mm mini pot range (RP8510 series) as a closer match, or source from Mouser.
[ 02 ] TIER 2 — MOUSER NZ
nz.mouser.com — Ships from AU warehouse. Fast delivery, usually 2–4 days. Best for specific/less common parts. Combine into one order to minimise shipping.
PARTS
SEARCH TERM / NOTES
PT2399 Delay Chip ×2
Search "PT2399". DIP-16. Core delay chip — do not substitute.
40106N Hex Schmitt Trigger ×1
Search "CD40106BE" or "HEF40106BN". DIP-14.
Neutrik NRJ6HF-1 Jacks ×3
Search exact part number. Smaller footprint — critical for PCB hole alignment.
16mm Right-Angle Pots (all values)
B=Linear, A=Audio/Log. Need right-angle PCB mount, 16mm body, 6mm D-shaft.
Piezo Disk ×1
Large piezo element with wire leads. Can also find at Jaycar.
The Neutrik NRJ6HF-1 jack footprint is smaller than generic jacks and must align with the PCB holes. Do not substitute with a generic panel jack.
[ 03 ] TIER 3 — SPECIAL SOURCES
These parts need dedicated sourcing. The CA3080 situation especially requires attention — most cheap chips on the market are counterfeit.
CA3080 // AS3080 — TRANSCONDUCTANCE AMPLIFIER ×1
The original CA3080E is discontinued and no longer manufactured. The build guide explicitly confirms: CA3080 = AS3080, they are pin-compatible drop-in replacements.
The DIY community reports that the overwhelming majority of cheap CA3080 chips sourced from AliExpress and similar are counterfeit. Do NOT buy from AliExpress for this specific chip.
Total self-sourced cost should land well under the original US$120 kit price. The Jaycar run covers most of the part count by volume.
[ !! ] CRITICAL BUILD NOTES
From the official DBA build guide — read before you solder a single joint.
The silver "hands" on the PCB artwork side are the exposed ground plane. Bridging a signal pad to the ground plane is the most common fault. Check this first if anything doesn't work.
Always socket your ICs — solder sockets first, insert chips last. Protects sensitive components during build.
The AS3080 goes in last of all the ICs. It is the most sensitive component on the board.
Do not bend the legs of jacks, switches, or rotary switches. Bend only small passives (resistors, caps).
You may need to cut the toggle switch legs flush if you want the synth to lay flat. Use heavy-duty cutters — not your good diagonal cutters.
Potentiometers mount flush with the board. Solder one pin first to set position, then solder the rest.
Trimmed component leads on the bottom of the PCB are sharp and may short on conductive surfaces. Fit rubber bump-ons to the corners.
Power: 2.1mm centre negative, 9V DC — standard guitar pedal supply.
The TAP pads and PIEZO contacts are the same circuit — you can trigger the envelope by touching the TAP pads with your finger even without the piezo installed.
The piezo mounts gold side up, affixed with tape, hot glue, or silicone.
Build order from the guide: Resistors → Non-polarised caps → Polarised caps → Diodes/LEDs/Transistors → IC Sockets → Hardware (jacks/switches) → Pots → Piezo → ICs → Knobs