G'day,
I have finally completed all the mods on my BC30 as follows: C3,C5,C6 removed, R15 - 1.6K, R21- 1.1K and finally C15 reduced from 22uf to 2.2uf. The things now sounds great. EQ is extremely effective and sensitive. Sounds very different to when I got it, has more gain but it is by no means a 'high gain' amp. Bigger sound and more responsive to touch. I am finished now and don't intend to tinker anymore but you never know.............