| Author |
Message |
    
CBblackbeard
| | Posted on Saturday, January 03, 2004 - 9:14 pm: | 
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I just bought a Wilson 1000 magnet mount antenna and the guy at the CB shop gave me a 66" whip instead of the standard 62" whip. He said the 66" would work better and that people were having trouble getting their SWR right with the 62". Does this make any sense? I had another Wilson 1000 with the 62" and my SWR was just right. |
Ca346
| | Posted on Saturday, January 03, 2004 - 10:30 pm: |
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Depends on what frequency you are centered on for setting the SWR. Pick a frequency you want to spend most of your time on and trim the whip til you have a flat or 1:1 SWR at that frequency.
I also have the Wilson 1000 and it goes from channel 13 up to 27.474 with < 1.5:1
I centered it on channel 38 (27.385 MHz) You will need a meter. |
Kiwikid
| | Posted on Saturday, January 03, 2004 - 10:41 pm: |
|
Hello Team,
CBblackbeard on a typical antenna installation that 66" whip will bring the tuned frequncy of the Willy 1000 down onto the lower end of 26Mhz. which is ideal in my country as our 40Ch.CB is 26.330Mhz. through to 26.770Mhz. but not in yours i.e. 26.965Mhz. to 27.405Mhz.If you plan to operate on the USA CB channels you will have to trim that whip if it does not drop far enough down into the hollow shaft.
Happy New Year
Best of DX for 2004
73
Kiwi Kid
CEF195 |
CBblackbeard
| | Posted on Sunday, January 04, 2004 - 11:45 pm: |
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So if I plan to operate on the standard CB channels ( 26.965 - 27.405 ) I should center the antenna on channel 20? |
Ca346
| | Posted on Monday, January 05, 2004 - 1:38 am: |
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Yup. |
Kiwikid
| | Posted on Monday, January 05, 2004 - 6:25 am: |
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Hi Team,
CBblackbeard:Roger!
Kiwi Kid
CEF195 |
Cm3885
| | Posted on Monday, January 05, 2004 - 12:42 pm: |
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That 62" whip is sold by my CB shop too. He said guys that talk below CH-1 like them. Mine has the 66" whip since almost all my talking is on the reg 40. |
Tech808
| | Posted on Monday, January 05, 2004 - 1:16 pm: |
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Technical Support
WILSON ANTENNA CUTTING GUIDE
APPROXIMATE WHIP LENGTHS
FOR 11 METERS ( CB )
CH FREQ. WILSON 1000/5000 BASE LOAD (1st Column)
TRUCKER 2000 & 5000 5" SHAFT (2nd Column)
TRUCKER 2000 & 5000 10" SHAFT (3rd Column)
1 ~ 26.965 = 62 ¾" / 52 " / 50 ½"
5 ~ 27.015 = 62 ¾" / 51 ¾" / 50 ¼"
10 ~ 27.075 = 62 ¼" / 51 ½" / 50 "
15 ~ 27.135 = 62 " / 51 ¼" / 49 ¾"
19 ~ 27.185 = 61 ¾" / 51 " / 49 ½"
25 ~ 27.245 = 61 ½" / 50 ¾" / 49 ¼"
30 ~ 27.305 = 61 ¼ " / 50 ½" / 49 "
35 ~ 27.355 = 61 " / 50 ¼" / 48 ¾"
40 ~ 27.405 = 60 ¾" / 50 " / 48 ½"
AMATEUR BAND (10MTR) FREQ.
WILSON 1000/5000 BASE LOAD (1st Column)
TRUCKER 2000 & 5000 5" SHAFT (2nd Column)
TRUCKER 2000 & 5000 10" SHAFT (3rd Column)
28.000 = 58 ½" 48 " / 46 ½"
28.250 = 57 ¾ " / 47 ¼" / 45 ½"
28.500 = 57 " / 46 ½" / 44 ¾"
28.750 = 56 ¼" / 45 ¾" / 43 ¾"
29.000 = 55 ½" / 45 " / 43 "
29.250 = 54 ¾" / 44 ¼" / 42 ¼"
29.500 = 53 " / 43 ½" / 41 ½"
29.750 = 52 ¼" / 42 ¼" / 40 ½"
Notes:
Actual length for your installation may vary, due to differences in vehicles and grounding.
Lengths listed above are for antenna whip only, measured from corona discharge tip to bottom of whip.
Antenna mast allows an additional 1-¼" adjustment of antenna. This allows for correcting and adding length if whip is cut to short.
To cut the stainless steel antenna whip, bolt cutters will easily do the job, however a standard hacksaw may also be used.
For frequencies other than those listed above, use the following formula:
468 ÷ F = ½W
½W ÷ 2 x 12 - C = Whip Length
WHERE: F = Frequency desired ; W = Wavelength ; C = Coil Factor
(Coil Factor : for W-1000 use : C=41.65 ; for Trucker 5" use: C=52.21 ; for Trucker 10" use C=53.84
The lengths calculated will be an approximate starting point only. Trim for best SWR.
Hope this helps.
Lon
Tech808 |
CBblackbeard
| | Posted on Monday, January 05, 2004 - 8:11 pm: |
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Got it !
Thanks everyone. |
