Single TX dual power supply

[RCruz]

I am building a stereo power amplifier and plan to use a single transformer with dual secondaries.

Each power amp board will have it's onw rectifier bridges and smoothing capacitors.

As the transformer has dual independent secondaries, I am using two bridges (one for V++ and another for V--)

As it is a stereo power amp, I will have four bridges total.

My question relates to the way I am planning to connect the single power amp to feed both amp boards in parallel.

Can I simply parallel the two positive bridges and the two negative bridges in the secondaries of the TX without fear of GND loops ?

I am posting the schematic of the PSU hoping for comments on possible issues and solutions.

 

[ctrlx]

you can try your way, but linking both main caps to form one ground works.

 

[RCruz]

Thank you.

But in fact my drawing had an error.

In reality both R++GND and R--GND only join in the loudspeaker GND return as in the new picture.

I am worried about paralleling the circuits using only one TX.

 

[RCruz]

Project04 from Rod Elliot suggests we can parallel AC secondary lines to power tho bridges... maybe my circuit will work.

 

[bansuri]

Why not like Elliot, half the diodes gives 1.5V higher output, the 0.3 resistor only increases the impedance and another 1,5V less.

You want a low impedance supply less distortion, more power

 

[RCruz]

Thank you bansuri

I can not change my layout... the boards are already etched.

Initially my intention was to use one TX for each channel but I am stuck with only one TX so that is why I posted this schematic