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Typical RCA female socket looks like this. See the location of - pin and + pin in that are going to be inside the chassis. The choice of the location creates large loop area, which causes pick up of noise.
Why are the + and - pins positioned this way?
Perhaps you're looking for a problem where there isn't one. The signal paths are still very near each other. The mm or two is hardly a large loop, and I doubt it contributes much if any noise. If it really bothers you, bend the tab down toward the barrel to decrease the loop.
berate is 8 and benign is 9
There are many where the centre pin remains the same size through the entire jack. I really like the Cardas brand, though the ease of soldering the centre pin is somewhat offset by the trickiness of the outer ring. Have done enough now to know some temp adjustments required.
Quite a range of economical to the "make you drool" exotic ones out there that address the spacing you speak of.
Admittedly I did not give the spacing any thought for my original selection.
75 ohm have to be spaced that way to meet spec.
"I know just enough to get into trouble. But not enough to get out of it."
Typical low cost connector. In all fairness though, in all the equipment I have used that had these type of connectors, noise was never a problem.
The only exception I know is Canare 75 Ohm RCA female socket.
One of my favorite rca jacks is the Vampire CM2F/CB. It features an unusually high-mass body, so it's very rigid and robust from a vibration control POV.
Notice the deep indentation slot for use as the ground/return wire soldering platform. The space between the ground/return soldering slot and the dielectric placed between the signal contact soldering platform are very close to one another.
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