Should grounds go like this?

leander · 7th November 2005, 10:28 AM

Could you please confirm that grounds should be connected like this as shown...

Thanks

regards
Leander

richie00boy · 7th November 2005, 10:50 AM

Yes that should be good. Remember the speaker ground returns to the star point as well, not the PCB. Signal input leads to the PCB should be insulated from the chassis.

bocka · 7th November 2005, 11:26 AM

Hi,

its better to connect the GND from C12 directly to C13. You can also omit R23 and C10.

Upupa Epops · 7th November 2005, 11:33 AM

Ground from snubber ( Boucherot ) you must lead separately, not by common wire with filtration...

MikeB · 7th November 2005, 01:28 PM

Quote:

Originally posted by bocka
Hi,
its better to connect the GND from C12 directly to C13. You can also omit R23 and C10.

Yep, i can confirm that !

Mike

MikeB · 7th November 2005, 05:06 PM

Quote:

Originally posted by MikeB
Yep, i can confirm that ! Mike

I only meant c12/c13, r23 can be necessary but if it is, it should not be bypassed with c10.
And if r23 is used, this signal gnd should not be further connected to the power gnd.

Mike

Tube_Dude · 7th November 2005, 06:39 PM

Hi Leander

With only two diode drops ( D2 an D3 ) you will have severe crossover distortion. You must add one or two more diodes and a trimmer pot for adjustment .

MikeB · 7th November 2005, 06:49 PM

Jorge, that's a CFP outputstage, it does not that high voltage to have bias ! With 4 diodes it will fry. But you're right, it's ClassB, and rod designed that thing for subwoofer.

Mike

raveenvijendren · 15th November 2005, 06:56 AM

Good Day,

Is it fine to connect the entire circuit common(star point ground) to earth ground of the power cable?

richie00boy · 15th November 2005, 07:38 AM

Yes and that would be a good idea for safety.

7th November 2005, 10:50 AM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Yes that should be good. Remember the speaker ground returns to the star point as well, not the PCB. Signal input leads to the PCB should be insulated from the chassis. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

7th November 2005, 06:39 PM	#7
Tube_Dude diyAudio Member Join Date: Mar 2002 Location: Aveiro-Portugal	Hi Leander With only two diode drops ( D2 an D3 ) you will have severe crossover distortion. You must add one or two more diodes and a trimmer pot for adjustment . __________________ Jorge

15th November 2005, 07:38 AM	#10
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Yes and that would be a good idea for safety. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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7th November 2005, 11:26 AM	#3
bocka diyAudio Member Join Date: Jul 2003 Location: Hannover	Hi, its better to connect the GND from C12 directly to C13. You can also omit R23 and C10.

7th November 2005, 11:33 AM	#4
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	Ground from snubber ( Boucherot ) you must lead separately, not by common wire with filtration...

7th November 2005, 06:49 PM	#8
MikeB diyAudio Member Join Date: Apr 2004 Location: Gütersloh	Jorge, that's a CFP outputstage, it does not that high voltage to have bias ! With 4 diodes it will fry. But you're right, it's ClassB, and rod designed that thing for subwoofer. Mike

15th November 2005, 06:56 AM	#9
raveenvijendren diyAudio Member Join Date: Nov 2005	Good Day, Is it fine to connect the entire circuit common(star point ground) to earth ground of the power cable?

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