Well here is my problem.
I put everything on that board I did from National datasheet and then supply it. what I get? +40 volt at the output...
The supply I use is +, - 41.8Volt.
Ok there was a miss calculation somewhere there and got a 2x30Volt 150Watt toroidal for my 2x50Watt amplifier.
Ok I know it is a bit high (at the limit of the chip). When the supply is open air I measure +41.8 and -41.8 but then when I connect it to the board and measure the supply voltage at pin 1, 5, 4 it is +38 and -38
It is strange to me that I hear everyone say how good that chip "work" and all I get is +supply at the output (pin #3), having nothing connected as input signal. Thank god I measured the output before I connect it to the speaker, or I would have them in my hand
I also get that +40 volt at the output, even if the mute pin has no currect drown from it.
Is it realy that power supply I use? or something else?
p.s.
that is the circuit board I made
I put everything on that board I did from National datasheet and then supply it. what I get? +40 volt at the output...
The supply I use is +, - 41.8Volt.
Ok there was a miss calculation somewhere there and got a 2x30Volt 150Watt toroidal for my 2x50Watt amplifier.
Ok I know it is a bit high (at the limit of the chip). When the supply is open air I measure +41.8 and -41.8 but then when I connect it to the board and measure the supply voltage at pin 1, 5, 4 it is +38 and -38
It is strange to me that I hear everyone say how good that chip "work" and all I get is +supply at the output (pin #3), having nothing connected as input signal. Thank god I measured the output before I connect it to the speaker, or I would have them in my hand
I also get that +40 volt at the output, even if the mute pin has no currect drown from it.
Is it realy that power supply I use? or something else?
p.s.
that is the circuit board I made