I buil a stereo power amplifier using this power supply cicuit and I still have pop or click noise when there is a noise on mains ( like switching on or off a pvr or any other equipement )
Should i get rid of the insulation circuit betwen chassi ground and mains ground ? or what would be the next step ?
Should i get rid of the insulation circuit betwen chassi ground and mains ground ? or what would be the next step ?
I finally find the bug .. nothing to do with power amp .... no earth ground in power bar .... chassis was floating with no grounding at all .... Idid change power bar ... and the problem quit. Happy with that ....
If Your amp have symetric power supply like +42.5V and -42,5V (85V)
then connect network from Earth to C.T. of the secondary of the transformer
between C1 and C2
not at the -V point ?
then connect network from Earth to C.T. of the secondary of the transformer
between C1 and C2
not at the -V point ?
then no need to use Center Tap on the transformer. AND connect capacitors to + and - power lines.
Now You have 12000uF/60V IN series that mean 6000uF/120V.
It is not enogh hig voltage rating and present capacitors
Mind the voltage value of the capacitors must be more than 85V - use 100V capacitors.
Totally agree. Your protective earth should go from the inlet directly to the chassis else you could end up with mains on your chassis if you have a fault. Hopefully just a schematic typo.
connect
"Figure 5 - A High Current Safety Loop Breaker Circuit"
this way
https://sound-au.com/earthing.htm
Bridge rectifier, Center Tap - unconnected
"Figure 5 - A High Current Safety Loop Breaker Circuit"
this way
https://sound-au.com/earthing.htm
Bridge rectifier, Center Tap - unconnected
