boji
Well-known member
My goodness, 4 supplies, each with an 8ga com? How many channels? I thought I was over compensating, but compared to your setup, might be the other way around.The buses all run under with layers of aluminum for shield but the 4 powersuppies were inductive when under the console. Wire from the supplies are 16ga except for the ground wires that are 8ga.
Reviewing some broadcast console setup manuals, the earth ground is given a special run of its own, directly from the control room mains, tied to the frame with a big lug terminal. From there, PSU grounds are stacked at this point. From the other side of this lug is a run to the broadcast console's backplane agnd. Coms read like a star ground but with hefty wire!
Edit: Forgive these basics, this is new to me when it comes to actual implementation.
For my frame's power delivery, I'm treating the copper distribution bars as the "backplane's backplane" i.e. From these bars, up to each bucket's 500 series and channel backplanes with 18ga. But it sounds like com returns leaving the copper bar should be increased in gauge, and have its own run to a lug post, circumventing the amphenol connector.
Thanks Newmarket, I'll for sure try distance before considering investing in costly shielding.for shielding - "mumetal" preferably but it's not really practicable or affordable...
Practically distance is your friend - as you found - and twisted pair / differential electronics for good CMMR.