Mark-6 Mobile Antenna
Thank you for purchasing the Mark-6 spring. This spring is intended for
very large whips and remotely-tuned HF antennas. We hope you will enjoy
many years of good mobile operation with it. The Mark-6 is constructed of
stainless steel, except for the tinned copper braid, which is internally
connected from one end to the other.
Size: Approximately 2.57" diameter, approximately 6.9" long
Weight: 4.875 pounds.
Bending torque: Approximately 39 foot-pounds for a 10 degree deflection.
Torque is measured with a perpendicular load applied 36 inches above the
Install the spring using a 1/2-13 stud or bolt. If purchasing hardware
from a hardware store, ask for a GRADE-8, or stainless bolt. If using
stainless hardware, be absolutely sure to use anti-seize compound to avoid
galling. A 1/2" stainless split-ring lock washer may be used on either or
both ends as desired. In one flat on each end of the spring is a tapped
hole. In each of these holes is a lubricated stainless 10-32 set screw.
After tightening the spring to base and antenna mast to spring, tighten
the set screws using the hex wrench provided. This will reduce the chances
of the spring or mast loosening during usage.
Use the flats machined into the spring ends for tightening, and for
preventing the ends from turning in the spring while tightening a whip or
Occasionally, drop a few drops of LPS-3 into the top threaded hole. The
LPS-3 will wick down into the tinned braid to protect it from the
elements. This is more important in wet climates.
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CAL-AV LABS, INC.
1985 North El Moraga Drive
Tucson, AZ 85745-9070
Mobile Antenna / Mast Spring Assemblies
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