Threshold S350 schematic help

[tvlogic]

Need help, I have a Thresold S350 which has blown out one side. The Motorola part number has been removed. Any ones has the schematic & knows the NPN and NPN part number, I sure would appreciate it. This amp was designed by Mr. Pass

 

[Dennis Hui]

This thread has some info:

http://www.diyaudio.com/forums/pass-labs/4153-threshold-s300-output-transistors-help.html

 

[tvlogic]

Thanks Dennis,
Any ones has the S350 schematic ?

 

[jewilson]

You can call Pass Lab they will know. The transistors are the same in the Threshold S150 and others. I still have a S150 and I called Pass Lab a spoke to Nelson and he sent me some more outputs. The problem is these transistor or no longer made, they were made by Motorola and Mot sold that business a long time ago. I will at the ones I have and let you know the part number, however you will have to find some ones that the spec are close and you will have to match them. The best source is On Semi.

 

[Dennis Hui]

Thanks Dennis,
Any ones has the S350 schematic ?

I thought in that thread Peter Daniels said he had the schematics.
Perhaps you can contact him?

Dennis

 

[jewilson]

The 300 is simular to the smaller amps just more output transistor. Some where I have the 300 schematic but no telling where. If I find do it I will send it to you.

 

[tvlogic]

Thanks for all of your help !
Would contact Pass Lab & see whether they have advice.
If anybody find a copy of the schematic, please send me a copy.

 

[jewilson]

Yeah all you need to know is in the thread that I started that Dennis mentioned .

I lunched mine several times running Apogee 1 ohm speakers.