Amp Camp Amp - ACA

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#1,987
ottopilot said:
I'm attempting to build a dual mono ACA (two supplies, one chassis) and will be mounting one ACA PCB to each heatsink of the same chassis.

I was looking closely at the ACA PCB noticed that the layout has plated through hole mounting holes and those are connected with a trace that runs around the board to provide ground to various components. Because the mounting holes are conductive and the ACA kit (presumably) uses metallic standoffs (as will I), they appear to connect what I would normally consider signal ground to chassis ground at the heatsink.

I thought it was generally accepted that signal grounds should normally come back to a star ground (which then connects to the power supply ground) to avoid noise. If that's the case, why are the through holes plated and effectively connected to chassis ground? Is this simply a compromise for simplicity of installation for the intended audience?
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This was my concern too, I assume that since nobody answered this post it's not an issue, thanks for your help.
 
#1,993
Rewind said:
Don't know yet. I will build a F-5 first and then maybe a F-4 together with a 2A3 amp. I thibk the camp amp's sound would improve with a better PSU.
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Seen lots of talk about the PSU but never anything conclusive? all i can say is Mr pass seems to think its fine and money on upgraded power supply is in the realm of diminishing returns, better to put the money into a better pass amp. Anyhow they are playing now ( The most important part) with the laptop power supplies with a dcb1 and im very happy thanks papa gota go i love this next bit xx



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