Here's a classic Sony integrated amp that uses V-FETs for the output devices. This one belongs to a friend that had not been able to get it working. I had to source 2SK60 and 2SJ18 matched pair transistors from Hong Kong. The DC bias had malfunctioned and blown one of the original 2SK60s. I used 1N4148 as replacements for the bias diodes and some new coupling caps (Black Gate) and Panasonics. The ESR meter was a great help in checking out the caps. Some overall cleaning and a listening test with an SACD player and a pair of LSi7. Talk about a sweet sound? Very listenable, I hope he's not in a hurry to get it back.