DIY mini T2 Build Thread

[JoaMat]

I like the idea about to-252.

First draft… 

 …have to think about this.

XLR ground pin to signal ground on PCB.

 

 

 

[Shawn]

12 hours ago, JoaMat said:

XLR ground pin to signal ground on PCB.

Correct me if I am wrong.

The Ground Pin(Pin1) has been connected to the XLR socket shell by default by the manufacturer in some cases.

This way, the ground pin should be left unconnected to avoid a looping ground.

In this case, the loop may be like this: XLR(Pin 3)-> AMP signal ground - > L bracket - > chassis -> XLR(Pin 3).

I just realised the L-bracket is isolated to the signal ground, so it should be fine.🤐

I assumed the amp chassis ground wires are connected to the PSU chassis somewhere, and the amp signal grounds are merged with the XLR ground, and then connected to the PSU power supply ground somewhere.

[kevin gilmore]

the neutrik jacks i used in the diy t2 are actually 4 wires. the connector shell is a seperate wire. i put in a jumper to chassis ground for that wire.

[JoaMat]

You might say I follow the strategy of DIY T2 PSU by Kevin. I have two PSU I’m using for all my electrostatic amplifiers. One original T2 PSU and one I made myself basically same as the original but with KGSSHV PSU regulators.

Bottom line: I’ve never have bother about grounding strategies. So far, I haven’t had any issues with ground loops that I’m aware of.