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Old 4th May 2008, 05:56 AM   #1
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Default How connect the Gnd.

Hi Guys i finished my first GainClone! its an 5 channels amp, i tested 3 channels and everything are OK, no HUM or anything strange. Nice sound, cant test it at high vol levels because right now are 3AM and ppl are sleeping at home.


Btw, im finished the speakers connectors, and i have an question...

is OK to connect all the speakers GND Together and the Gnd come from the RCA Input?

When i tested the amp, i was using Gnd from the RCA Inputs.

Any advice will be welcomed, i will post some pics after finish the amp.

The case are from Wood so really dont know how to connect it using the most safe way. i want to the fule blow quickly if something go wrong
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Old 4th May 2008, 12:22 PM   #2
AndrewT is offline AndrewT  Scotland
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Hi,
use a light bulb in the mains supply for EVERY modification of your amplifier.

If the case is wood (electrical insulator) then where does the Safety Earth go to?
How have you connected all exposed conductive parts to the Safety Earth?
__________________
regards Andrew T.
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Old 4th May 2008, 03:17 PM   #3
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Quote:
Originally posted by AndrewT
Hi,
use a light bulb in the mains supply for EVERY modification of your amplifier.

If the case is wood (electrical insulator) then where does the Safety Earth go to?
How have you connected all exposed conductive parts to the Safety Earth?

I already tested the amp, and works great, about the gnd dont connected anything yet :=D

if the case ar from wood i dont need to connect the Safety Earth right?

I want to finish it so i can take pics, but need to solve how connect all the gnd first so i can close the case.
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Old 4th May 2008, 03:17 PM   #4
gareth is offline gareth  Wales
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Hi samsagaz,
Are you using a single or centre tapped supply?
Thanks
Gareth
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Old 4th May 2008, 03:44 PM   #5
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Centre tapped one
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Old 4th May 2008, 04:36 PM   #6
eketehe is offline eketehe  Indonesia
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Quote:
How have you connected all exposed conductive parts to the Safety Earth?
Hi There,
sorry for jump in your thread,

Hi Mr Andrew,
Once i have safety earth education in my last project,
This is for my next project,
I see people separate the PSU in other casing,
sud we brings the safety earth to the amp case? which maybe metal or wooden.
where we install the power bank ( trafo, diode, caps, regulator ), psu box or main amp box?

Brgds
Eka
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Old 4th May 2008, 04:39 PM   #7
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Quote:
Originally posted by eketehe


Hi There,
sorry for jump in your thread,

Hi Mr Andrew,
Once i have safety earth education in my last project,
This is for my next project,
I see people separate the PSU in other casing,
sud we brings the safety earth to the amp case? which maybe metal or wooden.
where we install the power bank ( trafo, diode, caps, regulator ), psu box or main amp box?

Brgds
Eka
well, if you already do an Safe Hearth can you explain how you do it?
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Old 4th May 2008, 04:43 PM   #8
gareth is offline gareth  Wales
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Quote:
Originally posted by samsagaz
Centre tapped one

Hi samsagaz,
So your centre-tap is your main earth point for your system. You can bring your phono plug etc earths back to this point.
Thanks
Gareth
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Old 4th May 2008, 04:46 PM   #9
gareth is offline gareth  Wales
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Quote:
Originally posted by eketehe


Hi There,
sorry for jump in your thread,

Hi Mr Andrew,
Once i have safety earth education in my last project,
This is for my next project,
I see people separate the PSU in other casing,
sud we brings the safety earth to the amp case? which maybe metal or wooden.
where we install the power bank ( trafo, diode, caps, regulator ), psu box or main amp box?

Brgds
Eka

Hi eketehe,
Yes bring your safety earth in (if it is off-board)
Thanks
Gareth
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Old 4th May 2008, 04:51 PM   #10
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Quote:
Originally posted by gareth


Hi samsagaz,
So your centre-tap is your main earth point for your system. You can bring your phono plug etc earths back to this point.
Thanks
Gareth

So i need to connect all the RCA inputs to the center Tap?

What about the Gnd of the speakers? are OK to put all together to the Center Tap too?

Regards
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