Building a Pearl 2

Pearl2PSU.jpg


what is the function of that 35A bridge on the left side of the diagram??
 

6L6

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1)25A would work fine. I suspect the 35A was specked because there is a big box of them on the shelves of the parts room at Pass Labs. You wouldn’t want to go much smaller however, as the bridge must carry any AC fault current for safety.

2) the breaker connects from the chassis/IEC safety earth on one side and the PSU ground on the other. Look at the 2 different ground symbols in the schematic in the article.
 
Hello members,


I use exactly the same bridge-rectifier together with a CL-60 thermistor for
building my ground-loop-breakers.
I use them in all of my DIY- Pass-poweramps.

Sometimes I did it with 2 single Diodes (direction against each other - paralleled together with a paralleled resistor around 10 Ohms) in my preamps, active crossovers,... with lower power consumption.

Works beautiful. Also in Germany with 230V/50Hz.
But hum or hiss can also have other reasons! :rolleyes:
But often there are groundloops. My experience.



Greets
Dirk
 

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