Phil Jones Bass M-500 power amp

[Mick Bailey]

Does anyone have a schematic for the Power amp board for a PJB M-500? I'm finding this to be troublesome to work on due to part of the board being obscured by a heatsink and it's difficult to see where traces run.

Tried three different contacts at PJ (including the man himself) but no reply.

[J M Fahey]

EDIT: I had answered thinking it might be using a Class D cookie sized power amp but just checked its page and itīs a 19kg box of electronics, so it must be a normal Class AB one.

Or maybe a quad rail Class F/G/H one (never remember which is which )

[Mick Bailey]

Its a regular AB amp with just +/- 70v rails. It's impressive how compact it is - really neat. But this goes against it when troubleshooting.

[g1]

Welcome back Mick, it's been awhile.

[Mick Bailey]

Nice to be back.

[Leo_Gnardo]

Welcome back Mick, it's been awhile.

I'll second that! Mick's back, woohoo! Bejeebers, it's been a long time. I'll take this as a good sign.