chiily
PFM Special Builder
I have one of those and it sounds wonderful. Sadly I don't use it anymore...anyone wanna buy it...The preamp with separate GND lines was called Starfish...
I have one of those and it sounds wonderful. Sadly I don't use it anymore...anyone wanna buy it...The preamp with separate GND lines was called Starfish...
I use a miniDSP Flex as a pre-amp these days to cross over a subWhy not just use it and have fun? Or do you have a better preamp now...?
BTW: what about extrem star earthing in the power amp like in the Starfish...?
Yea had protection onboard, last time one failed it destroyed the outlet stage literally ,this time just a pair of rectifier but it blew the tracs around them so had to replace whole board.The 220 board was fine no obvious damage, I have a couple of 200 boards spare so might try some of these ideas on them.Noticed the Blamless was upside down compared to the NCC boards did throw me for a minute.Oh dear, that's a shame/nuisance. Do you have dc speaker protection?
I used a pair of bc556 in the current mirror to replace the 1k and 22k resistors to tr1 and tr2 respectively, each with 68R emitter degeneration resistors; and bc556 as the additional transistor in the VAS mod, along with the original ztx753. Just remember that the 'blameless' is 'upside down' compared to the NCC200/220.
Edit: Dont forget that ther are also other mods (full complimentary output stage) and I'd need to draw the whole circuit out for completeness.