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4 JAN @ 1400
Today I received my new 10K Competition Plus Predator with the 22" staff and installed it on my pick-up.
The antenna's length was 53" prior to trimming-down to get a good VSWR.
At 53", the VSWR was about 6! First guess cut was 2-1/4" which reduced the VSWR down to about 4. Next cut of 1-7/8" brought the VSWR down to 3.8 and now I was getting that warm and fuzzy feeling. Cut, cut and more cutting at 1/2" increments. Final length from the top of the corona ball / tip to the bottom of the mast is 42-15/16". VSWR is 1.2:1 to 1.4:1 across all the channels. Good enough for today because the rain shut me down. To be continued tomorrow. The diameter of the mast is 0.150" and is not tapered.
With the combination of the 22" shaft plus the height of the Breedlove Quick Disconnect fixture, the bottom of the coil is at least 1-1/2" above the top of the roof. A 24" shaft would probably be better, but the next size shaft is 27".

<blockquote data-quote="Recon" data-source="post: 699965" data-attributes="member: 55589">4 JAN @ 1400Today I received my new 10K Competition Plus Predator with the 22&quot; staff and installed it on my pick-up.&nbsp;The antenna&#039;s length was 53&quot; prior to trimming-down to get a good VSWR.&nbsp;At 53&quot;, the VSWR was about 6! First guess cut was 2-1/4&quot; which reduced the VSWR down to about 4. Next cut of 1-7/8&quot; brought the VSWR down to 3.8 and now I was getting that warm and fuzzy feeling. Cut, cut and more cutting at 1/2&quot; increments. Final length from the top of the corona ball / tip to the bottom of the mast is 42-15/16&quot;. VSWR is 1.2:1 to 1.4:1 across all the channels. Good enough for today because the rain shut me down. To be continued tomorrow. The diameter of the mast is 0.150&quot; and is not tapered.&nbsp; &nbsp;With the combination of the 22&quot; shaft plus the height of the Breedlove Quick Disconnect fixture, the bottom of the coil is at least 1-1/2&quot; above the top of the roof. A 24&quot; shaft would probably be better, but the next size shaft is 27&quot;.</blockquote>

[QUOTE="Recon, post: 699965, member: 55589"] 4 JAN @ 1400 Today I received my new 10K Competition Plus Predator with the 22" staff and installed it on my pick-up. The antenna's length was 53" prior to trimming-down to get a good VSWR. At 53", the VSWR was about 6! First guess cut was 2-1/4" which reduced the VSWR down to about 4. Next cut of 1-7/8" brought the VSWR down to 3.8 and now I was getting that warm and fuzzy feeling. Cut, cut and more cutting at 1/2" increments. Final length from the top of the corona ball / tip to the bottom of the mast is 42-15/16". VSWR is 1.2:1 to 1.4:1 across all the channels. Good enough for today because the rain shut me down. To be continued tomorrow. The diameter of the mast is 0.150" and is not tapered. With the combination of the 22" shaft plus the height of the Breedlove Quick Disconnect fixture, the bottom of the coil is at least 1-1/2" above the top of the roof. A 24" shaft would probably be better, but the next size shaft is 27". [/QUOTE]

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