I don't think so. Philips is seen from under (European projection).li_gangyi said:
Flat surface towards you, pins down. From left: E B C
In that case you're right...maybe ACD got his layout mixed up...but nevermind though...he got the ECB and stuff printed on top...I'll forget about the silkscreen and go with the pinouts....
I have checked and the silk print seems to be wrong, just the EBC thing.Otherwise a nice pcb. 
The diodes D105-108 can't see any purpose. If you do get negative voltage, the base-emitter of Q108 will work as ONE diode and you can never get any current through the TWO diodes.
The diodes D105-108 can't see any purpose. If you do get negative voltage, the base-emitter of Q108 will work as ONE diode and you can never get any current through the TWO diodes.
li_gangyi said:
Are you sure? The datasheets from ON and Philips suggest they are the same.
Edit: More than me noticed obviously...
Peranders
C109 charges to half the Voltage across R128 through R124/126.
In case of large spikes faster than R-C time of C109-R124, these spikes are feed through the Diodes.......
C109 charges to half the Voltage across R128 through R124/126.
In case of large spikes faster than R-C time of C109-R124, these spikes are feed through the Diodes.......
Hello folks ,
I have a question for those who built this amp with OPA627 :
what values did you use for C101 , C102 , C103 , C109 and R121 .
Did you add a new cap between pin 2 and pin 6 of the OPA ?
Thanks for answering ,
best regards ,
@ + Philippe.
I have a question for those who built this amp with OPA627 :
what values did you use for C101 , C102 , C103 , C109 and R121 .
Did you add a new cap between pin 2 and pin 6 of the OPA ?
Thanks for answering ,
best regards ,
@ + Philippe.
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