Quantity   Component name
1 × P100 mask medium, 9200, McCordick
1 × black project box (amplifier) Hammond 1593K
1 × extruded-aluminum project box (speaker) similar to Hammond 1457C1202 but 3" wide, not 2.2"
1 × 1.5" speaker Mode 61-650-1
1 × microphone a re-purposed pair of ear buds, J-Lab Audio, JBuds Pro
1 × SPDT mini slide switch
3 × 3.5 mm stereo mini phono barrel jacks
1 × Custom stereo mini jumper, male-male, both right-angled 7.75” long, 3.5 mm
2 × 9V NiMH battery and backup battery don't forget to buy a charger.
1 × 9V-clip to barrel jack adapter 2.5" long, Adafruit 80, or similar
1 × 9V battery holder
1 × DC barrel jack 2.1 mm x 5.5 mm, center positive.
3 × 1/2" metal snaps, set of male and female
6 × bolts for snaps, with nuts, 1/4" long, 9/64" dia.
4 × machine screws for speaker zinc-plated, pan-head, 3 mm dia., 11 mm long
4 × nuts zinc-plated, for 3-mm dia. bolts
4 × acorn nuts zinc plated, for 3-mm dia. bolts
1 × strip board
4 × Schmartboard-brand jumpers 2 x 2"; 2x 5", mostly with female terminals hand-bent at 90 degrees
6 × header pins
1 × J111 Discrete Semiconductors / Transistors, MOSFETs, FETs, IGBTs
1 × LM 386 Audio ICs / Audio Amplifiers
1 × NE5532AP Amplifier and Linear ICs / Operational Amplifiers
2 × 1N4148 Discrete Semiconductors / Diodes and Rectifiers
1 × 100 kohm trimpot, multiturn, top adjusted
2 × 8-pin DIP socket
1 × 10 kohm trimpot, single-turn
1 × green LED
1 × chassis mount for LED
2 × 220 microF electrolytic capacitor
1 × 10 microF nonpolarized cap
4 × 10 microF electrolytic cap
1 × 0.47 microF plastic-film cap
1 × 0.22 microF cap, blue encapsulation
1 × 0.1 microF ceramic cap
2 × 47 nF cap, tan encapsulation
1 × 470 pF cap, tan encapsulation
1 × 1 Mohm resistor 1/4 W
1 × 100 Kohm resistor 1/4 W
4 × 47 Kohm resistor 1/4 W
1 × 15 Kohm resistor 1/4 W
1 × 10 Kohm resistor 1/4 W
2 × 1.5 Kohm resistor 1/4 W
1 × 3.3 Kohm current limiting resistor for LED, 1/4 W
1 × eyebolt
3 × nuts for eyebolt
2 × lock washers for eyebolt
2 × 12-V zeners 1N4742