My sigma11 have the transformer in a separate chassis, and am planning to use this to drive my upcoming PPA headphone amp.
Here is the setup:
- transformer in metal enclosure, earth is connected to the chassis, and 24V AC + earth is forwarded to the actual:
- sigma11 in metal enclosure. The chassis is connected to earth as well, through the connection from the transformer box. From here I have 4 x 24V DC output connectors, and one of them is supposed to power the:
- PPA headphone amp, driven by 24V DC from the sigma11. Chassis not connected to earth.
Note that the only part that is actually completed so far is the sigma11 box, but here my problem arises; the DC connectors I have used are NOT shielded from the chassis. That means that V- is connected to earth, wich I supposed is not good
I know that I should have checked this BEFORE building the sigma11, or at least before I drilled out the panel and everything, but what is done is unfortunately done.
Is there anything I can do, short of replacing my connectors to something else?
Could a ground loop breaker be used in some way, or am I basically lost?
Would it be a bad idea to disconnect earth from the sigma11 box altogether? I really dont like that idea, but perhaps that would be acceptable since there is no 230V there?
The power jacks I am using is Switchcraft L712AS