Difference between revisions of "Opek HVU-200"
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(Created page with "Opek mobile antenna 4-band HF / VHF / UHF. *FREQUENCY RANGE: 28-29MHz/ 50MHz/ 144MHz/ 430 ~ 440MHz *GAIN: 1.8 dBi(144MHz) / 4.5 dBi (430 ~ 440MHz) *POLARIZATION: Vertical *...") |
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*POWER CAPACITY: 200 Watts (144 / 430 ~440 MHz SSB), 120 Watts (28-29 / 50 MHz SSB) | *POWER CAPACITY: 200 Watts (144 / 430 ~440 MHz SSB), 120 Watts (28-29 / 50 MHz SSB) | ||
*CONNECTOR: PL-259 | *CONNECTOR: PL-259 | ||
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| + | Each section is adjustable to tune in the associated band. Adjustments are made by loosening an Allen screw and moving a section up or down guided by your SWR meter. | ||
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| + | == SWR Tuning == | ||
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| + | == Experimenting == | ||
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| + | The first isolator which looks like a black plastic load separating the bottom 70cm portion from the middle 2m portion can be removed leaving only the bottom 70cm portion allowing the antenna to function as a 70cm UHF only antenna. Doing this shortens the wave ratio to match it up perfectly with GMRS frequencies. | ||
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| + | [[Category:Electronics]] | ||
| + | [[Category:Radio]] | ||
| + | [[Category:HAM Radio]] | ||
| + | [[Category:Tangible Product]] | ||
Revision as of 21:48, 31 July 2015
Opek mobile antenna 4-band HF / VHF / UHF.
- FREQUENCY RANGE: 28-29MHz/ 50MHz/ 144MHz/ 430 ~ 440MHz
- GAIN: 1.8 dBi(144MHz) / 4.5 dBi (430 ~ 440MHz)
- POLARIZATION: Vertical
- IMPEDANCE: 50 Ohm
- POWER CAPACITY: 200 Watts (144 / 430 ~440 MHz SSB), 120 Watts (28-29 / 50 MHz SSB)
- CONNECTOR: PL-259
Each section is adjustable to tune in the associated band. Adjustments are made by loosening an Allen screw and moving a section up or down guided by your SWR meter.
SWR Tuning
Experimenting
The first isolator which looks like a black plastic load separating the bottom 70cm portion from the middle 2m portion can be removed leaving only the bottom 70cm portion allowing the antenna to function as a 70cm UHF only antenna. Doing this shortens the wave ratio to match it up perfectly with GMRS frequencies.
