I have a question for those of you using this Power Supply PCB for chipamps. I just built one using the Amp PCBs from circuitbasics.com. The amp works and sounds amazing, but I cannot get rid of a radio frequency I am picking up.
I have moved components around the chassis twice, changed my signal wires to shielded, added 1nf caps to the rca grounds, and tried different grounding schemes.
My big question is, how have others connected multiple grounds to the main ground? In the build guide I am following on circuitbasic.com there are multiple tabs for wiring the PCB ground, signal ground, rca ground, and speaker ground?
I bolted all of them to chassis but still getting noise. I am tempted to build a ground loop breaker from the below link, but not sure it is legal in Texas:
Ground Loop Breaker -
EasyEDA
Any help is appreciated. I have the parts to build the above breaker and trying to avoid doing it, if possible.
I have moved components around the chassis twice, changed my signal wires to shielded, added 1nf caps to the rca grounds, and tried different grounding schemes.
My big question is, how have others connected multiple grounds to the main ground? In the build guide I am following on circuitbasic.com there are multiple tabs for wiring the PCB ground, signal ground, rca ground, and speaker ground?
I bolted all of them to chassis but still getting noise. I am tempted to build a ground loop breaker from the below link, but not sure it is legal in Texas:
Ground Loop Breaker -
EasyEDA
Any help is appreciated. I have the parts to build the above breaker and trying to avoid doing it, if possible.
Would the Super Gainclone perform better with higher rails? Mark selected the Antek AS-2222 transformer as his preference, which 22 VAC x 2 at 200VA. I under the safety factor using only 200VA transformers, but the 24v to 36v transformers in the same series are the same price and only 1 part to change on the power supply PCB. Since this is a new build, why not use higher rails?
Radio frequencies won't be fixed by attenuating the ground loop. Are you sure it's RFI?
So I see this PS may be a good candidate for the Xmas Amp - Dibya's TDA7293 by Jhofland
Mark, do you have any of these boards left? If so I'd like to buy 2. I'm planning a single chassis dual-mono PS for my Xmas Amp.
Thanks 🙂
Mark, do you have any of these boards left? If so I'd like to buy 2. I'm planning a single chassis dual-mono PS for my Xmas Amp.
Thanks 🙂
