Krell KSA-300s schematic page 2 missing

[jcsb]

Does anyone have the page the schematic is referring to for the auto-bias?
John

 

[Pars]

This is the schematic from HiFi Engine, but not sure I'm seeing it here. Not sure where yours came from though, Electrotanya maybe?

 

[jcsb]

Yeah I couldn’t find it either. I have the schematic from 2 different sources but not that sheet.

 

[jcsb]

Well I did find the patent for the auto-bias circuit which does explain alot to me. I've attached it for anyone to review. This explains the missing schematic and the timer ic's.
John

 

[mlloyd1]

Nice find! I wonder if the patent had been granted when the original schematic was released ... could explain why it wasn't included

 

[jcsb]

The release date I have on some of the sheet were 1993 a year before the patent was approved. So yeah I think the second sheet was an internal document not released.

 

[hpavictor]

In this old Krell FBP200 , the bias control is realized through software and the probability takes into account the voltage peak, current and temperature and time constants.

 

[hpavictor]

This is schematic ?

 

[jcsb]

Same as what I have but it is missing page 2 auto bias circuit which consists of approximately 30-40 components.