[ARC5] Bare Aluminum USN sets.

[Mike Morrow]

> If the corrosion gets between the potted capacitors and the chassis, 
> the designed RF bypassing is gone and instead you have interstage coupling.

A "problem" that, one suspects, would likely **not** have been ameliorated
by paint on the externals of the equipment.  And one that the VHF AN/ARC-5
units, lacking such paint, seem to have avoided.

73,
Mike / KK5F