Aleph X powersupply

[PatPet]

Hello guys.
I've encountered a problem when trying to use the PSU designer to simulate the ripple voltage across the amplification circuit.
I need to know what value of the resistance of the circuit should i assume?
Thank you guys

[Faber]

You can use a current load. I can simulate ite with 4A that is what
my config draws.

Bye!

[PatPet]

Is this power supply ideal?

[PatPet]

the attachment is here

[Alain Dupont]

PatPet,

I have loaded your file on the PSU designer

The values are too high for me...
500 milli Farad = 0.5 Farad at 50 volts it will cost arm and legs
100 milli Farad = 0.1 Farad

To be more acurate go for 60 000 micro F and lower the resistors CRC
with 2 * 60 000micro and 0.25 Ohms youll have 6 milli volts ripple...
will be easy and good cost..
the CRCRC with the same values, and one more stage, excellent...

I send back the 2 prototypes one CRC and the other CRCRC

Regards.

Alain.

[PatPet]

Thank you Alain Dupont

But how much space does a 22000uF capacitor occupy?

Also, what is the difference between

(-27)--------
C1
(g)-----------
C2
(+27)--------

and

(27)---------
C3
(g)-----------

if they are the same, what are the relationships among C1, C2 and C3?

C1 + C2 = C3?

[Alain Dupont]

PatPet,

>> But how much space does a 22000uF capacitor occupy?
Panasonic TS serie 22 000 micro f 35 Volts Dia=35mm Lg=50 mm
Digikey: P6921-ND at 9.6cad$ idem for 50 Volts Digikey: P6946-ND at 11.4 cad $

You can parallel 3 of these to make 66 000 micro Farad.
This will be better because you parallel the internal resistor of the caps
so you have lower global resistance.

>> if they are the same, what are the relationships among C1, C2 and C3?

No relation between the C1, C2, C3 idealy should be similar values...
C1 = C2 = C3

Take care to use a bridge rectifier for > 250 amperes peek
because there is a huge current at power up...

If the voltage obtained at C3 is too much, better use a transfo with a lower
secondary voltage.

The best thing is to use only little resistors to avoid too much losses
and big capacitors, to get solid bass.

Regards.

Alain.

[PatPet]

Thank you for your help

Regarding the two filtering circuits, i mean if


do the same reduction in ripple voltage
what should be the value for the capacitance respectively for each of them?

[Alain Dupont]

PatPet,

Its the same with a positive and negative supply.

I return your schematic with 2 CRCRC for positive and negative supply's

Regards.

Alain.

[Alain Dupont]

PatPet,

I modified the power supply schematic of the A75 stereo
with a CRCRC using the 31000 microF of the original, as an example.

Regards.

Alain.