buzzzzz, where did i go wrong?

I've done similar circuit and grounding uprades.The key as others have mentioned is your using the new rods to supplement your existing service ground lowering the overall resistance.Spacing of the rods is important,they should be at least six feet from the service ground and six feet apart and each rod must be tied back(with a separate wire) to the same point in your panel as the service ground.Don't tie the rods together as you want the rods connected in parallel not series.Also you should have an isolated ground on your outlets for each circuit and each ground wire should be connected back to the same point in your panel as your service ground and rods.This is the essence of a star grounded system with ONE low resitance pathway to earth.If your using your fuse connections as a subpanel in some kind of enclosure make sure none of your neutrals are bonded to it.If your using in-line fuses you won't have this concern.

Hey JD.......Bob here.The reason I asked you about the neutrals or white wires is that these are also referenced to the same grounding nuetral bar in your main panel.You should have a grounding neutral bar in your sub-panel.Tell me if you fed your sub-panel with hot ,neutral and ground or if you just ran the hot wire to your fuses and did you install a breaker in your main panel to branch from.Back to the neutrals,the grounding bar in your sub panel has a bonding screw through it to ground the enclosure itself.This bond is NOT USED for sub-panels.Also one other very important item is your metal conduit connection if its functioning as your ground consider that the point that it connects to your main panel is likely inches away from the grounding neutral bar and being connected directly to the panel enclosure you will certainly pick up stray voltages.The best way to accomplish your outlet grounds is get the Hubbells or Leviiton Hospital outlets with isolated grounds and run separate wires back to your panel.You can then use your conduit as a shield by connecting it to the panel end only and using a plastic washer on the outlet box(if metal) to isolate it.One more great thing to finish off the grounding job is if you have room in your main panel install an additional grounding bar(these are readily available and designed to attatch to your existing bar) and connect all your new outlet neutrals and grounds to this bar.If you can install the bar as close to your service ground as possible(also you should connect your rods right next to the service ground) this gives your audio circuits the most direct path to earth and minimizes the reaction from the rest of your house wiring.I used to wire houses in my younger days and was close to becoming a journeyman electrician before deciding on another career.Hope this helps and feel free to email me if you like....