But I wonder if anybody has tried using 4 pairs of 2sk1058/j162 without the source resistors?
I just built the classic 1977 NS/Hitachi using a pair but my friend wants to go to 100W, by using 4 pairs, but my PCB design didn't anticipate that!
I used 2n5402, 2sd669/b645 ( even mje340/350 here & it works fine!) instead of the recommended 2sa872, 2d756/b716 which are hard to find where I am.
& I wonder why amateurs aren't starting to build with this simple but very reliable topology.
agreed.Usually if I am rebuilding (recapping & tweeks mostly) I measure all the fets and group them to minimise the imbalance.
I cant see you will have any problems with 2 pairs per side.