Gainclone instructions. Page 15 LM3875 Gainclone - Building Instructions It's time to install amp boards now. A 25 volt (+/- Dual Rail), 5 Ampere, toroidal transformer was used to supply electricity for the amp. After a bit of research and a heap of reading I have decided to build a Gainclone amp using LM3875 chip which I purchased from Peter Daniel via his online store. Transformer, diodes only. Are you get worried about its name? The Gainclone idea is based on the original Kimura-San/47Labs Gaincard design, which follows the principle that “less is more” and has a low component count, a very short signal route, etc. Check the voltages, any above 80% in supply are too much, they means supply volts should be around 80% of max. There are no filter capacitors. 12 or 15 VAC secondaries can also be used successfully. I use only isolated chips. May 13, 2008 ยท These three panels are the highest risk, if a mains wire breaks loose. toevfkk frnm m2f3eo xdkc g8b m6px x29t ca3 irnv6 pwnm