Antenna Cutting Charts
We use a
dremel with a cutting disc to cut all our stainless steel
antenna whips. If you don't have a dremel handy, you can use a
triangle or similar file and file a deep notch at the point
where you want to cut the antenna. Snap the antenna at the
notch. Then file the antenna smooth. When cutting any antenna
rod, please take care and always wear eye protection.
MAKE ALL CUTS SLIGHTLY LONGER THAN LISTED TO
GIVE YOURSELF ROOM TO WORK WITH THE SWR
ADJUSTMENTS.
VHF
1/2 Wave Cutting Chart
No Ground
Plane
Not for the 1/2 wave marine
antenna
| Frequency MHz |
SWR |
Whip Length Inches |
Whip Length Millimeters |
| 132 |
1.23 |
49 7/16 |
1255 |
| 134 |
1.13 |
47 5/8 |
1210 |
| 136 |
1.10 |
46 1/4 |
1175 |
| 138 |
1.10 |
44 7/8 |
1140 |
| 140 |
1.13 |
44 |
1117 |
| 142 |
1.18 |
43 1/8 |
1095 |
| 144 |
1.20 |
42 1/2 |
1080 |
| 146 |
1.17 |
42 |
1067 |
| 148 |
1.09 |
41 1/8 |
1044 |
| 150 |
1.07 |
39 15/16 |
1015 |
| 152 |
1.02 |
38 13/16 |
986 |
| 154 |
1.03 |
37 11/16 |
957 |
| 156 |
1.06 |
36 9/16 |
928 |
| 158 |
1.10 |
35 3/4 |
908 |
| 160 |
1.09 |
34 13/16 |
885 |
| 162 |
1.09 |
34 1/4 |
870 |
| 164 |
1.10 |
33 9/16 |
853 |
| 166 |
1.16 |
32 7/8 |
835 |
| 168 |
1.26 |
32 |
813 |
| 170 |
1.35 |
31 5/16 |
795 |
| 172 |
1.42 |
30 9/16 |
777 |
| 174 |
1.44 |
29 15/16 |
760 |
VHF 5/8
Wave Cutting Chart
| Frequency MHz |
Whip Length Inches without spring |
Whip Length
Inches with spring |
| 134 |
52 3/4 |
50 3/16 |
| 136 |
51 3/4 |
49 13/16 |
| 138 |
51 |
48 7/16 |
| 140 |
49 15/16 |
47 1/4 |
| 142 |
49 |
46 1/8 |
| 144 |
48 1/16 |
45 1/4 |
| 146 |
47 1/4 |
44 7/16 |
| 148 |
46 1/4 |
43 3/8 |
| 150 |
45 1/2 |
42 11/16 |
| 152 |
44 13/16 |
41 15/16 |
| 154 |
44 |
41 1/8 |
| 156 |
43 1/8 |
40 3/8 |
| 158 |
42 7/16 |
39 1/2 |
| 160 |
41 3/4 |
38 3/4 |
| 162 |
40 15/16 |
38 |
| 164 |
40 3/8 |
37 3/8 |
| 166 |
39 11/16 |
36 11/16 |
| 168 |
39 |
36 |
| 170 |
38 3/8 |
35 7/16 |
| 172 |
37 13/16 |
34 5/8 |
| 174 |
37 3/16 |
34
1/4 |
1/4
Wave MAGNET MOUNT
| Frequency MHz |
Whip Length Inches |
| 136 |
20.47 |
| 137 |
20.35 |
| 138 |
20.28 |
| 139 |
20.08 |
| 140 |
19.88 |
| 142 |
19.61 |
| 144 |
19.29 |
| 146 |
19.17 |
| 148 |
19.06 |
| 150 |
18.90 |
| 152 |
18.78 |
| 154 |
18.66 |
| 156 |
18.43 |
| 158 |
18.11 |
| 160 |
17.72 |
| 162 |
17.52 |
| 164 |
17.17 |
| 166 |
16.93 |
| 168 |
16.73 |
| 170 |
16.46 |
| 172 |
16.26 |
| 174 |
16.06 |
UHF Gain
Antenna Model 1177
445-470 Mhz
Hole and
trunk lip mount
Measure from bottom of phasing coil out to desired
freq. length
| Frequency MHz |
No Spring Inches |
With Spring Inches |
| 445 |
9 1/16 230mm |
7 5/16 185mm |
| 450 |
8 3/4 222mm |
7 1/16 180mm |
| 455 |
8 7/16 214mm |
6 3/8 162mm |
| 460 |
8 1/16 205mm |
6 1/4 152mm |
| 465 |
7 5/8 134mm |
5 11/16 144mm |
| 470 |
7 3/16 133mm |
5 11/16
144mm |
VHF / UHF 1/4
Wave Cutting Chart
|
Frequency
MHz |
Whip Length Millimeter |
Whip
Length
Inches |
| 136-144 |
520 |
20
1/2 |
| 144-150 |
488 |
19
3/16 |
| 150-160 |
457 |
18 |
| 160-170 |
430 |
16
15/16 |
| 400 |
168 |
6
5/8 |
| 410 |
165 |
6
1/2 |
| 420 |
162 |
6
3/8 |
| 430 |
160 |
6
5/16 |
| 440 |
153 |
6 |
| 450 |
148 |
5 13/16 |
| 460 |
144 |
5 11/16 |
| 470 |
142 |
5
9/16 |
| 480 |
138 |
5
7/16 |
| 490 |
135 |
5
5/16 |
| 500 |
130 |
5
1/8 |
| 510 |
128 |
5
1/16 |
| 800-900 |
70 |
2
3/4 |
| 870-940 |
62 |
2
7/16 |
VHF Low Band Base
loaded 26.5 - 28 Mhz
Hole and trunk lip mount
| Frequency MHz |
Whip Length
No Spring |
Whip Length with Spring |
| 26.5 |
49 inch |
45 15/16 inch |
| 27.0 |
46 5/16 |
44 1/8 |
| 27.5 |
44 7/8 |
42 5/16 |
| 28.0 |
43 5/16 |
40 15/16 |
| 28.5 |
41 5/8 |
38 7/16 |
| 29.0 |
39 15/16 |
37 3/4 |
| 29.5 |
39 |
36 3/16 |
| 30.0 |
37 3/16 |
34 13/16 |
| 30.5 |
35 15/16 |
33 9/16 |
| 31.0 |
34 5/8 |
32 3/8 |
VHF Low
Band Base loaded 29.5 - 35 Mhz
Hole and trunk lip
mount
| Frequency MHz |
W/O Spring Inches |
With Spring Inches |
| 29.5 |
49 |
47 7/16 |
| 30 |
47 1/4 |
45 1/8 |
| 31 |
44 1/16 |
43 1/8 |
| 32 |
41 15/16 |
39 3/4 |
| 33 |
39 9/16 |
37 1/8 |
| 34 |
37 3/16 |
34 13/16 |
| 35 |
35 5/16 |
32 7/8 |
VHF Low Band Base
loaded 34 - 40 Mhz
Hole and trunk lip mount
| Frequency |
No Spring |
With Spring |
| 34 |
49" |
47 7/16" |
| 35 |
46 3/4" |
45 1/8" |
| 36 |
45 1/8" |
43 1/2" |
| 37 |
42 3/4" |
40 3/4" |
| 38 |
41 1/8" |
38 11/16" |
| 39 |
39 13/16" |
37 3/8" |
| 40 |
37 13/16" |
35 5/8" |
VHF Low Band Base
loaded 34 - 40 Mhz
Magnet mount
| Frequency |
No Spring |
With Spring |
| 34 |
49" |
47 7/8" |
| 35 |
49" |
47 1/4" |
| 36 |
47 5/8" |
45 1/8" |
| 37 |
44 7/8" |
42 7/8" |
| 38 |
42 3/4" |
40 7/8" |
| 39 |
40 3/4" |
38 3/8" |
| 40 |
38 3/4" |
36
5/8" |
VHF Low Band Base
loaded 40 - 50 Mhz
Hole or Trunk lip mount
| Frequency |
No Spring |
With Spring |
| 40 |
49" |
46 7/8" |
| 41 |
46 5/8" |
44 7/8" |
| 42 |
45 3/8" |
43 7/16" |
| 43 |
43 1/4" |
41 3/4" |
| 44 |
42" |
40 1/16" |
| 45 |
40 7/16" |
38 7/8" |
| 46 |
39 1/4" |
37 1/2" |
| 47 |
38 1/4" |
36 1/2" |
| 48 |
37 |
35 1/4" |
| 49 |
35 15/16" |
33 7/8" |
| 50 |
35 7/16" |
33
1/4" |
VHF Low Band Base
loaded 40 - 50 Mhz
Magnet mount
| Frequency |
No Spring |
With Spring |
| 40 |
49" |
49" |
| 41 |
49" |
48 15/16" |
| 42 |
48 1/16" |
47 1/4" |
| 43 |
46 3/8" |
45 1/2" |
| 44 |
44 11/16" |
43 11/16" |
| 45 |
43 1/8" |
42 5/16" |
| 46 |
41 3/4" |
40 13/16" |
| 47 |
40 3/8" |
39 3/8" |
| 48 |
39 3/16" |
38 1/8" |
| 49 |
38" |
36 13/16" |
| 50 |
36 13/16" |
35
5/8" |
VHF Low Band Base
loaded 47 - 54 Mhz
Hole and trunk lip mount
| Frequency MHz |
Whip Length Hole Mount and Lip Mount |
Whip Length
Magnet
Mount |
| 47 |
48 inch |
48 inch |
| 48 |
47 5/8 |
48 13/16 |
| 49 |
46 7/16 |
48 5/8 |
| 50 |
45 3/8 |
47 5/8 |
| 51 |
44 7/16 |
46 5/8 |
| 52 |
43 1/8 |
43 3/4 |
| 53 |
43 1/2 |
43 3/16 |
| 54 |
41 15/16 |
43
7/8 |
To contact us please email to sales@shultzie.com
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