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> Pcb for audio amplifier LM3875 hifi gainclone amp qty:2
Pcb for audio amplifier LM3875 hifi gainclone amp qty:2
for 56W Hi Fi Audio Power Amplifier
uses LM3875 "Overture" HiFi Audio Amp IC
both INVERTING and NON-INVERTING amp versions on the same PCB
High quality FR4 double-sided, plated-thru and tinned holes, with conformal coating, solder mask and silkscreen.
This PCB enables the building of either an inverting or non-inverting amp. Circuit traces and parts placement are provided for BOTH versions. You choose which parts you want to populate to obtain the amplifier you want. This is the only Gainclone PCB that allows you this flexibility.
Build yourself the amplifier that sells for hundreds to thousands of dollars in various incarnations and brand names.
The "Gain-clone" or "Chip-Amp" stirred a great following of audiophiles, originally inspired by the "Gaincard" Amp, a product made notorious by its exceptional sound quality -and price tag-, and which used none other than the "Overture" LM3875 Amplifier IC.
below: front and back of PCB. This is one of the very few Gainclone boards that implements a ground plane, while also providing a "star" grounding point.
Requires a filtered power supply of between +/- 24V and +/- 42V. Maxiumum power output attained only with supplies of +/- 32V or more.
below: Schematic of the inverting amplifier implemented on the PCB
below: Schematic of the non-inverting amplifier implemented on the PCB
BELOW: populated PCB (some components left out for better view)
below: the board holds the LM3875 so its back plate slightly projects outside the PCB (by 20 mils) to accomodate heat sink positioning both above and below the board.
