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Microphone Preamplifier short-form kit

A kit that includes the Mic Preamp PCB and all the parts that mount on it. As a bonus, it also includes the switches and the mounting hardware. Add a case, XLR connectors, bezel LED and wiring and you have a complete preamp.

Click the link immediately below for a full list of the parts included in the kit.

Cat No SC6784. Price: AUD $70.00 ¹

Add to trolley (available until stock is exhausted)

In stock:

yes (28 available). Estimated dispatch time: 1-3 days

Related to: Project: Microphone Preamplifier (February 2024 [print issue] [online issue])

Other items relevant to this project:

Kit parts list

	1 × 300µH 2A toroidal inductor (Wurth 7447060)
	1 × 100µH 2A toroidal inductor (Wurth 7447021)
	2 × Solder tag miniature SPDT two-position latching toggle switch
	1 × 9mm 10kΩ reverse log single-gang potentiometer (short D-type shaft)
	1 × Microphone Preamplifier full PCB [01110231]
	1 × 1A DPDT 5V DC coil relay (EA2-5NU)

Connectors

	1 × PCB-mount DC barrel socket, 2.1mm ID
	2 × 8-pin DIL dual wipe IC socket (DIP-8)
	2 × 3-way vertical polarised header with matching plug & pins (2.54mm pitch)
	3 × 2-way vertical polarised header with matching plug & pins (2.54mm pitch)

Semiconductors

	2 × NE5532 dual low-noise op amp IC (DIP-8)
	2 × LM2577T boost regulator (TO-220-5)
	2 × LM317 37V 1.5A adjustable linear regulator (TO-220)
	1 × LM337 -37V 1.5A adjustable linear regulator (TO-220)
	2 × BC559C 30V 100mA low-noise PNP transistor (TO-92)
	8 × 1N4148 75V 200mA diode (DO-35)
	6 × 1N4004 400V 1A diode (DO-41)
	4 × 1N5819 40V 1A schottky diode (DO-41)
	5 × 6.8V 500mW zener diode (DO-35)
	1 × UF4002 100V 1A ultrafast diode (DO-41)

Through-hole Capacitors

	1 × 470µF 25V 105°C electrolytic (5mm pitch)
	4 × 220µF 63V 105° electrolytic (5mm pitch)
	2 × 220µF 25V 105° electrolytic (2.5mm pitch, 8mm diameter)
	10 × 47µF 63V electrolytic
	8 × 10µF 63V subminiature electrolytic (2.5mm pitch)
	1 × 1µF 50V electrolytic
	15 × 100nF 100V MKT
	1 × 10nF 100V MKT
	3 × 1nF 100V MKT
	3 × 22pF 50V C0G/NP0 ceramic disc (5mm pitch)

Through-hole Resistors

	2 × 47kΩ ±1% ¼W
	2 × 33kΩ ±1% ¼W
	3 × 22kΩ ±1% ¼W
	1 × 12kΩ ±1% ¼W
	2 × 10kΩ ±1% ¼W
	10 × 6.8kΩ ±1% ¼W
	10 × 4.7kΩ ±1% ¼W
	2 × 3.9kΩ ±1% ¼W
	1 × 3kΩ ±1% ¼W
	4 × 2.7kΩ ±1% ¼W
	1 × 2.4kΩ ±1% ¼W
	1 × 2.2kΩ ±1% ¼W
	10 × 1.8kΩ ±1% ¼W
	1 × 750Ω ±1% ¼W
	1 × 430Ω ±1% ¼W
	2 × 390Ω ±1% ¼W
	1 × 330Ω ±1% ¼W
	1 × 150Ω ±1% ¼W
	3 × 100Ω ±1% ¼W
	1 × 22Ω ±1% ¼W
	7 × 10Ω ±1% ¼W
	1 × 2.2Ω ±1% ¼W

Cable & Hardware

	10 × Shakeproof M3 washer (toothed type)
	4 × 6mm Nylon M3 spacer
	8 × 15-16mm metal panhead M3 screw
	6 × Stainless or carbon steel M3 hex nut
	1 × To suit D-shaft knob

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