DC Servo MOSFET Amplifier

[apexaudio]

Can you publish schematic also?

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[ChingTan]

SPS1000 Diy friendly not tested.

sir, can you add more details on this like wire gauge or number of turns i'm new in making smps and planing to try this.

 

[still4given]

Hi Mile or others. Do you have a simple balanced input circuit for the FX100? I'd like to put one of my FX100 amps in a case for light PA use and my mixer has balanced outs. One with a layout would be preferred.

Thanks, Terry

 

[apexaudio]

Hi Mile or others. Do you have a simple balanced input circuit for the FX100? I'd like to put one of my FX100 amps in a case for light PA use and my mixer has balanced outs. One with a layout would be preferred.

Thanks, Terry

You can find circuit in post #661 thread http://www.diyaudio.com/forums/class-d/182900-class-d-amp-lm566-lm393-2xirf530-67.html#post4243362
Regards

 

[still4given]

Hi Mile, that is what I am looking for. Do you know if anyone has done a layout for it?

Thanks, Terry

 

[still4given]

I took a stab at a layout for the balanced input. Please check it for accuracy.

Thanks, Terry

 

[Dacz]

looks good.. 100N filter missing

 

[thimios]

This SMPS will be a very interesting project if Mile can explain the transformer construction details.

 

[xrk971]

If this is the same SMPS Apex discussed earlier, I think he uses an old ATX PC SMPS transformer.

 

[Oland]

I took a stab at a layout for the balanced input. Please check it for accuracy.

Thanks, Terry

DO NOT!!! ne5532!!! BETTER ad843-5+ad817-811!!

 

[alex mm]

If this is the same SMPS Apex discussed earlier, I think he uses an old ATX PC SMPS transformer.

no I don't think so ,it's ETD49 or ETD59 ferrite core .

 

[still4given]

looks good.. 100N filter missing

The 100n caps are SMD. Notation is in red and reversed because it is on the bottom. I guess I could move things over so I can add through hole parts too.

Quote:
Originally Posted by still4given View Post
I took a stab at a layout for the balanced input. Please check it for accuracy.

Thanks, Terry
DO NOT!!! ne5532!!! BETTER ad843-5+ad817-811!!

Are you saying Mile's design is not good? Better to argue that in the other thread.

 

[Oland]

The 100n caps are SMD. Notation is in red and reversed because it is on the bottom. I guess I could move things over so I can add through hole parts too.



Are you saying Mile's design is not good? Better to argue that in the other thread.

No! Mile's design good! N5532 bad!

 

[kool lites]

If this is the same SMPS Apex discussed earlier, I think he uses an old ATX PC SMPS transformer.

More details of the smps would be really good. Maybe it's own thread?

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[thimios]

More details of the smps would be really good. Maybe it's own thread?

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Yes we need full instructions,how many turns,coil diameter. e.t.c

 

[apexaudio]

Yes we need full instructions,how many turns,coil diameter. e.t.c

Use 0,6mm wire, wind 20 turns with 4x0,6mm wires in prallel on ETD49 core for primary. Wind 3 turns with 0,6mm for 24v secundary and 2 turns 2x0,6mm in series for 2x15v... for main secundar wind 2x8 turns with 5x0,6mm wires in parallel.

 

[ChingTan]

where can i find the pcb ?

 

[prasi]

Mr. Miles can I put one more pair of IRF mosfets to the 3 pair dc servo mosfet amp (so total 4 pairs) and use 77VDC supply? is there any need for changing the small signal transistors? what would be power in 8 ohms and 4 ohms with 77VDC supply?
also can use the FX-100 supply for PSU and protect function for this 4 pair amplifier ?

link for amp and supply here...
amp: http://www.diyaudio.com/forums/solid-state/162081-dc-servo-mosfet-amplifier-54.html#post4567321

supply: http://www.diyaudio.com/forums/solid-state/162081-dc-servo-mosfet-amplifier-61.html#post4624521

 

[Rick G]

They Work

Prasi,
Got both of the boards up and running,+-55V. Still have to get proper heatsinks for them before i can give a proper listen to them. Thank you for the boards.

Rick

 

[still4given]

Hey Rick, looking good! I feel bad, I have mine populated except for the outputs. Same boat, no appropriate heatsinks freed up. Looking forward to your assessment.