ANTENNAS
|
ALL HF, VHF, AND UHF 1/4, 1/2, 5/8, AND FULL WAVE ANTENNAS |
FULL WAVE - 5/8 WAVE - 1/2 WAVE - 1/4 WAVE
PRE-CALCULATED RF FORMULAS IN FEET AND INCHES
| FREQUENCY AND BAND |
FULL WAVE |
5/8 WAVE |
1/2 WAVE |
1/4 WAVE |
|
1200 MHz 23cm |
8" |
5" |
4" |
2" |
|
900 MHz 33cm |
1' |
7.5" |
6" |
3" |
|
440 MHz 70cm |
2' 1" | 1' 3" | 1' .5" |
6" .1" |
| 220 MHz 1.25 M | 4' 2" | 2' 6" | 2' 1" | 1' .5" |
| 144 MHz 2 M | 6' 4" | 4' 1" | 3' 2" | 1' 6" |
| 54 MHz 6 M | 18' | 11' 3" | 9' | 4' 6" |
|
28 MHz 10 M |
33' |
20' 5" | 16' 6" | 8' 3" |
|
24 MHz 12 M |
38' 10" | 24' 4" | 19' 5" | 9' 8" |
|
21 MHz 15 M |
44' 4" | 27' 8" | 22' 2" | 11" 1' |
| 18 MHz 17 M | 51' 8" | 32' 5" | 25' 10" | 12' 11" |
| 14 MHz 20 M | 66' 4" | 41' 3" | 33' 2" | 16' 7" |
| 10 MHz 30 M | 92' 8" | 57' 5" | 46' 4" | 23' 2" |
| 7 MHz 40 M | 132' | 83' | 66' | 33' |
| 5 MHz 60 M | 188' | 118' | 94 | 47 |
| 3.5 MHz 80 M | 260' | 163' | 130' | 65' |
| 1.8 MHz 160 M | 520' | 325' | 260' | 130' |
EASY TO MAKE - 3 ELEMENT - 146 MHz - 2 METER YAGI
| ELEMENT | POSITION FROM 1 | LENGTH | CENTER POINT |
| 1 REFLECTOR | 0 | 3' 1" | 1' 6 1/2" |
| 2 DRIVEN | 2 FEET | 1' 5" X 2 | N/A 1' 5" |
| 3 DIRECTOR | 4 FEET | 2' 9" | 1' 4 1/2" |
STATISTICS: 6.52 DB OF GAIN. CENTER FREQUENCY 146 MHz. SWR 1.1
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PLEASE NOTE: THESE ANTENNA LENGTHS ARE VERY CLOSE TO WAVELENGTH, BUT THEY STILL MAY NEED SOME TUNING. DON'T CUT TOO SHORT LEAVE SOME ROOM TO TUNE! YOU MAY NEED TO BUY A TUNER, IT HELPS OUT ALLOT!
I HOPE THIS ANTENNAS PAGE HELP'S YOU WITH YOUR NEW PROJECTS!
THANKS AND 73!
ZACH KC9CLR