Mark-5 Mobile Antenna
Thank you for purchasing the Mark-5 spring. We hope you will enjoy many
years of good mobile operation with it. The Mark-5 is constructed of
stainless steel, except for the tinned copper braid, which is internally
connected from one end to the other.
Size: Approximately 2” diameter, approximately 4.65” long
Weight: 2.125 pounds.
Bending torque: Approximately 9 foot-pounds for a 10 degree deflection.
Torque is measured with a perpendicular load applied 36 inches above the
Install spring using a 3/8-24 stud or bolt. If purchasing hardware from a
hardware store, ask for GRADE-8, or stainless. If using stainless
hardware, be absolutely sure to use anti-seize compound to avoid galling.
A 3/8 stainless split-ring lock washer may be used on either or both ends
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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2440 N. Coyote Dr, STE 116
Tucson, AZ 85745 USA
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