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Elliott P72 Rev A - Non-inverted Gainclone - LM1875

Gainclone #1

This is the first Gainclone I built, so I decided I'd take the easy route and build an established project with a PCB, bill of materials and comprehensive assembly instructions.

Links
Parts

No

Part

1

Elliott P72A PCB

2

LM1875T chipamp

10

0.6 watt metal film resistors *

2

1 watt carbon film resistors *

8

Capacitors*

4

Fuses and fuse holders

4

Binding posts – isolated

2

RCA – isolated

2

TO220 isolating kit

* see Rod Elliott's Project P72A pages for full details.

Notes

Aluminium angle: 40mm x 40mm x 3mm (thick) x 180mm (length)

Initially, I had the two feedback reversed. This caused a gain of less than 1 which is well below the recommended minium gain of 10. The sound quality was OK but the volume available was rather low.

Picture


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