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CRC Power Supply (Class A amplifier)
CRC Power Supply (Class A amplifier)
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Old 6th October 2017, 09:15 AM   #671
Project16 is offline Project16  France
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The power or supply voltage of an amplifier is irrelevant and a 15V powered amplifier will be wired as a 50V power supply.

The major problem I think is that a lot of people confuse or associate grounding (earth) and masses (GNDs) and it has to be said that they are very different things and should never be connected together.
Then the GND must be carefully wired.

That's my point of view.
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Old 6th October 2017, 09:28 AM   #672
Project16 is offline Project16  France
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Quote:
Originally Posted by cl00sed View Post
You mean to use chassis ground to home ground?
YES.

The yellow and green wires are also connected to the earth connection if they exist on a transformer.
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Old 6th October 2017, 09:36 AM   #673
Project16 is offline Project16  France
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If you connect the ground (GND) of an amplifier to the chassis with the ground (earth) you are exposed to all the noise nuisances transmitted by the mains and there are many.
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Old 6th October 2017, 02:08 PM   #674
xrk971 is offline xrk971  United States
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CRC Power Supply (Class A amplifier)
Quote:
Originally Posted by Project16 View Post
If you connect the ground (GND) of an amplifier to the chassis with the ground (earth) you are exposed to all the noise nuisances transmitted by the mains and there are many.
Yes, that's why there are filters for the earth ground, DC blockers, etc. but commercial amps have to do this via GLB or NTC as it is required by electrical code for safety. Note that forum rules prohibit the recommendation by members to set up a system that doesn't follow electrical code for safety when it comes to wiring up mains.

Look at the Pass F6 PSU above, it follows code and connects earth GND to chassis GND and to PSU power GND via an NTC. That follows electrical code and has no hum. Can a similar arrangement be made for the dual CRC and dual Trafo? I haven't been able to find it yet.
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Old 6th October 2017, 03:39 PM   #675
CitizenKane is offline CitizenKane  Germany
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Hi Prasi,

got my boards today.

Thanks a lot
Jo
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Old 11th October 2017, 05:51 PM   #676
prasi is online now prasi  India
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CRC Power Supply (Class A amplifier)
Hi Jo,
Thanks for your confirmation.

regards
Prasi
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Old 12th October 2017, 03:43 PM   #677
prasi is online now prasi  India
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CRC Power Supply (Class A amplifier)
gtose, Cobra2, brookhart995

could you kindly confirm if you have received the PCB's.?

Also I dont seem to have the PCB receipt confirmations from Joca and h-wan . Could you let me know the status?

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Last edited by prasi; 12th October 2017 at 03:46 PM.
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Old 12th October 2017, 03:58 PM   #678
gtose is offline gtose  United States
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CRC Power Supply (Class A amplifier)
Quote:
could you kindly confirm if you have received the PCB's.?
I received mine!
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Old 12th October 2017, 04:42 PM   #679
Joca is offline Joca  Portugal
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Sorry. I've received mine. Already working with 0.0mvac ripple.

Nice work in the pcb. Thanks
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Old 12th October 2017, 05:31 PM   #680
prasi is online now prasi  India
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Thank you Joca... Glad that you are very happy with results. Credit for the design goes to Project16.
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