The VP312 Standard VPR Kit (Finished) is a partial kit, containing most of the components needed to complete a vintage inspired, 500 series, classic 312 microphone preamplifier. The preamp is essentially an exact recreation of the legendary API 312 preamp circuit that has become the benchmark for the API sound. More elaborate details on the circuit and design can be found here. The VPR kit is intended for those users with a standard API style VPR 500 Series rack. The PCB must be slightly and permanently modified by cutting off the extra gold finger connectors. Details and pics for this simple mod can be seen on the PCB product page using the link above. This is a partial kit that contains the following 20 items: (1) VP312 Mic Preamp PCB (1) VPx L Bracket (1) VP312 Finished Face-Plate (1) VP25-312 Hardware Kit (1) EA 2622 Input Transformer (1) EA 2503 Output Transformer (1) Bourns 25K CCW Audio Taper Potentiometer (1) 600 ohm T-Pad Attenuator (1) C&K SPDT Flat Lever Toggle Switch (3) C&K 2PDT Pushbutton Switches (2) x C&K Black Bullet Switch Caps (1) x C&K White Bullet Switch Cap (1) DOA PCB Socket Set (1) 1N4004 Pair of Rectifier Diodes (1) VP312 Resistor Set (1) VP312 Capacitor Set (1) Pointer Style 1/2" Black Aluminum Knob With 1/8" Shaft (1) Yellow Insert for x-50 Knob (1) Plain Style 5/8" Black Aluminum Knob With 1/4" Shaft (1) Green Insert for x-62 Knob Following is a list of addition components that are required to complete this build: (1) 2520 style discrete operational amplifier Here are required items that we do not carry at the store: A couple of small jumper wires for the t-pad (can use cut off leads from EA 2503) Solder, soldering iron and basic small hand tools Good assembly skills A decent understanding of schematics and electronic components
API is a registered trademark of Automated Processes Incorporated.
Cost of separate items: $208.27
Aluminum Knobs
Attenuators
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