Tag: modding
An Upgrade to My Gainclone Amplifier
by Angga on Feb.26, 2011, under Electronics
Well, it’s actually an additional pair of LM3886T chip amplifier, which I ordered again through a local supplier for the same amount of money (IDR 150000 or US$16.70). I previously have made 4 marking for drill holes because I intended to make two pairs of amps, but since I’ve only got a pair, I drilled two holes first for the mounting of the ICs in the middle of the heatsink. So basically I just have to add two more drillholes and that’s it.
Two pairs it is 
Side view
The previous and added pairs are configured for bridge mode operation into 6Ω speakers for 2 channels. This was simply achieved using just one 100kΩ resistor from one of the LM3886 output pin to the other’s inverting input pin. As usual, more info on bridging amplifiers can be found in the Wikipedia.
