other old amp schematic

[tadiam]

my next project......maybe.... 40w 8r
to diy comunity

OOOPS is this

 

[richie00boy]

That schematic has mistakes - look at the 5k6 resistor.

 

[wg_ski]

And I don't know why everyone insists on making that resistor too big. According to my calculations the 5.6k should be around 3k. As it is, the differential balance is going to *really* suck, if it even works at all. It needs to drop .8 volts or so at half the total LTP current - which, IMO, is too low to begin with.

And of course the resistor needs to be moved.

 

[tadiam]

re

I copy this from an old publication....
ok
what components exchange for better use?

 

[DigitalJunkie]

Are those two '4148 diodes connected properly?! 😕