LEDs don't need to run on DC proper, just need a diode to block half of the AC cycle. Also, they don't need to run on 12V. Just use a resistor to limit the current.
however I quickly discovered you can't solder Alu
LEDs don't need to run on DC proper, just need a diode to block half of the AC cycle. Also, they don't need to run on 12V. Just use a resistor to limit the current.
The only outstanding issue is a low bass hum (sounds even worse through the sub), luckily I can completely eliminate it if I touch the chassis or put my fingers on the RCA grounds.
I assume this is a ground loop issue? Anyone help guide me on how to identify ground loop issues and potential fixes?
Reading up I see a few options:
1. Attach a heavy gauge wire between T10 and Amp between both earth connectors to try and offer a lower resistance loop for the ground loop potential diff
The wire from the earth pin of the IEC socket should go directly to the chassis. The circuit's OV could be left without any connection to the chassis, but if you do decide to connect it to the chassis (for lower hum) do so via a resistor. 100 ohms is what I normally use but you could go higher. 680 ohms would be ok.I don't have a resistor on the ground wire to the chassis, should I grab some 100 ohms or can I use a 680?
Thin wire will not be a problem. People often use wire that's far thicker than necessary and it causes more problems than it solves. Actually, there are no problems to solve.I've replaced the RCA cable and it's much thinner and easier to route in the amp. Hopefully the wire is ok for signal as its thin, but it's supposed to be good for 30V so I hope it's all ok.