Krell KSA 50 pcb

[Upupa Epops]

Jan, this biasing circuit is nonsens !

[Jan Dupont]

Please tell
To me it seems quite normal, if you make a connection between C of TR8 to B of TR10, and again from C of TR7 to B of TR11.....
Or did I miss omething ????

[Jan Dupont]

Pic of a "normal" biasing circuit...
Sorry but it has to wait, as it seems as the pics I got here at my labtop doesn´t show well when published here...

[Upupa Epops]

To Jan : That will be correct .

[Jan Dupont]

Thanks Pavel
For a moment I thougt that I was gone crazy

[Upupa Epops]

To Jan : P.S. : If you will make a PCB, give capacitors on position CB of drivers and serial resistors to the basis of output devices - amp will be more stable .

[Upupa Epops]

P.P.S.: Try to think to give there a protector for overcurrent ( same as you have in your amp ) - amp without this circuit is crime .

[Jan Dupont]

Thanks for your suggestions
I will sure put in the output protection circuit, base resistors and CB caps on the drivers

[jarek]

Could someone tell me what for a resistors R1 in the PSU is?

[PMik]

It was a "smart trick"
it hides the basic sound quality of the incredeble poor schematics......its called "floating ground"

Musical Fidelity used "floating ground" as well for there P270 and A370



Removed my comments on Krell engineering or lack of same

Should not spoile your fun