I jumped on the bandwagon too and build up my first gainclone
. It's based on the integrated LM4780 chip with the hope that the specs of both amps are very near to each other. That works at least for the offset voltage that is exactly the same for both channels. It's done on the expense of channel separation but that's the decision. Input coupling capacitors are build up of 10 NOS WIMA MKS caps parallel soldered with a total value of 3,3 microFarad and the chip is connected with Dale instrument shunts. The power rails are fed by a toroidal transformer build up with 4 Vishay Roederstein EYH Caps 6800 microFarad each, Elna Silmic 2 ROS caps 1000 MicroFarad and 100 MicroFarad Silimic 2 RFS near the chip. All signal cabling is silver (my wife is a part time silversmith
) and power cables are of copper. The chip is cooled by two stripes of massive copper. All is build in an aluminium housing made for electrical installation.
The system is burning in but shows it's potential by now.
Georg