Studio Reference Amplifier

[apexaudio]

to find high VA transformer is very difficult.at my town supply is 240v and i want to step down to 110V.then i can use 110v to your psu and then variable to low voltage.so i can get high va power supply.what u think?
step down is low price then toroid transformer

Don't do that !!!

 

[Mamak]

Don't do that !!!

why?2sc5200 not support 150 v dc?

 

[apexaudio]

why?2sc5200 not support 150 v dc?

There is many reasons, just don't do that.
Regards

 

[apexaudio]

Turn on/off mute with FET

 

[Tekko]

The mute on the input wont do anything if the amp itself makes a ploop on turn on/off.

 

[apexaudio]

The mute on the input wont do anything if the amp itself makes a ploop on turn on/off.

This amp not make turn on 'ploop', if amp make ploop use protect with relay.

 

[apexaudio]

SR100 Schematic file in pdf

 

[Mamak]

mr apex.what other number for opa1632?its hard to find

 

[chlorofille]

Mamak,

Rs Components Malaysia have them.

 

[apexaudio]

mr apex.what other number for opa1632?its hard to find

What circuit use OPA1632?

 

[Mamak]

What circuit use OPA1632?

i want build balanced line driver

 

[apexaudio]

i want build balanced line driver

You can use TL072, like in this circuit for examle
Balanced Transmitter and Receiver II

 

[Mamak]

You can use TL072, like in this circuit for examle
Balanced Transmitter and Receiver II

can you help me convert from opa1632 pin for tl072 pin?i want build balance line driver from this circuit. DIY audio balanced preamp

 

[apexaudio]

can you help me convert from opa1632 pin for tl072 pin?i want build balance line driver from this circuit. DIY audio balanced preamp

TL072 can not be use in this circuit instead OPA1632.

 

[apexaudio]

Hi Mile ,
No, I have corrected, adding two jumpers on PCB . I intend to layout PCB for SR amplifier ....nice schematic . Thanks for sharing so many projects .
Regards Alex .

Hi Alex,
I must redesign your pcb, pins for transistors are too small, and BD241/242 are in revert position to heatsinks.
Regards

 

[apexaudio]

Shunt Regulator Component Layout

 

[apexaudio]

VR 1k must be replaced with 4k7, output voltage can be set from +/-12V up to +/-24V, outputs must have heatsink.

 

[juma]

mr apex.what other number for opa1632?its hard to find

THS4131 is pin-to-pin and functionally compatible with OPA1632.

 

[nix]

Rail voltage for SR200 is +/-75V, I prefer sound of bass from this amplifier topology.

hi apex

sir do you have pcb and component side of this amp? can you share with us. thanks in advance....

regards
nix

 

[apexaudio]

hi apex

sir do you have pcb and component side of this amp? can you share with us. thanks in advance....

regards
nix

I will share DIY version when it's finish, you can use 'coolet' pcb for SR50.
Regards