[TenTec] PS grounding

[John Rippey <w3uls@3n.net>]

The #961 PS I use with an OMNI VI has a ground lug. The switching PS that 
comes with the IC-746PRO, and an Astron switcher I own do not.

Why the ground lug on the 961? Is it a case of belt-and-suspenders? Or do 
linear PS's need a direct ground while switchers do not? Doesn't make sense 
to me given the propensity of switchers to emit RF noise.

73,
John, W3ULS

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