Hi all,
needing dual power supply, it would be better:
a) dual trafo/rectify/capacity section
b) a single transformer/diodes/caps
c) single trafo, dual center-joint coils, dual diode-bridge, dual caps
d) single trafo, dual separated coils, dual diode-bridge, dual caps; 0V (PGnd) node realized on DC line (V1- to V2+
e) two AC-DC Switching board providing needed voltage V++/V-- ; 0V (PGnd) node realized on DC line (V1- to V2+
f) four AC-DC switching boards connectet series-parallel in order to get needed voltage (ec. 24v+24v series modules each block jointed to get 48V++ and 48V--
I've recently found some stick bars of some LM3886 and LM4780 forgotten on stock 20years ago and now I would like to bild a good ACA, the best I can.
I've already tried to build a LM4780 based CAC prototype using two 19,5V notebook power supply, but is a little bit noisly when music silence
No humm comes when supply is from transformer/rectifier/ripple filter stage
needing dual power supply, it would be better:
a) dual trafo/rectify/capacity section
b) a single transformer/diodes/caps
c) single trafo, dual center-joint coils, dual diode-bridge, dual caps
d) single trafo, dual separated coils, dual diode-bridge, dual caps; 0V (PGnd) node realized on DC line (V1- to V2+
e) two AC-DC Switching board providing needed voltage V++/V-- ; 0V (PGnd) node realized on DC line (V1- to V2+
f) four AC-DC switching boards connectet series-parallel in order to get needed voltage (ec. 24v+24v series modules each block jointed to get 48V++ and 48V--
I've recently found some stick bars of some LM3886 and LM4780 forgotten on stock 20years ago and now I would like to bild a good ACA, the best I can.
I've already tried to build a LM4780 based CAC prototype using two 19,5V notebook power supply, but is a little bit noisly when music silence
No humm comes when supply is from transformer/rectifier/ripple filter stage