So I got a Quarter Wave Stubby antenna for my XTS2500.
I was wondering if anyone knows or has noticed a performance decrease.
OEM vs Qtr Wave antenna
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alannerd614
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Tom in D.C.
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Re: OEM vs Qtr Wave antenna
What band; what exact frequency?
If UHF, the stubby will be inferior to the OEM antenna, because the
OEM UHF antenna IS a full quarter-wave, or nearly so.
Figure it out for yourself:
468/450 mHz = 1.04 feet (halfwave) /2= .52 feet (quarter wave) x12 = 6.24 inches
On VHF all rubber antennas are a compromise because the length of the
quarter wave element is 17 to 20 inches or so, so all the rubber antennas are
helically wound (some are center fed, which helps a bit) but overall their
performance doesn't match that of a quarter wave.
If UHF, the stubby will be inferior to the OEM antenna, because the
OEM UHF antenna IS a full quarter-wave, or nearly so.
Figure it out for yourself:
468/450 mHz = 1.04 feet (halfwave) /2= .52 feet (quarter wave) x12 = 6.24 inches
On VHF all rubber antennas are a compromise because the length of the
quarter wave element is 17 to 20 inches or so, so all the rubber antennas are
helically wound (some are center fed, which helps a bit) but overall their
performance doesn't match that of a quarter wave.
Tom in D.C.
In 1920, the U.S. Post Office Department ruled
that children may not be sent by parcel post.
In 1920, the U.S. Post Office Department ruled
that children may not be sent by parcel post.
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RadioSouth
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Re: OEM vs Qtr Wave antenna
Don't know which you've got but there will be a difference. If you're in a high signal density area you might not notice it, but take it out to the edge of the system and I think you'll find a difference. Generally the more metal in the sky the better.
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alannerd614
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Re: OEM vs Qtr Wave antenna
Sorry about that:
800Mhz
800Mhz
Re: OEM vs Qtr Wave antenna
Big time difference in the short stubby and the normal antenna at 800. Not a good choice if there
is any chance you will be in a marginal operational area.
Most of the departments that have tried a stubby antenna have gone back to the full size due
to performance. Tell the boys to just put up with the longer antenna.
Jim
is any chance you will be in a marginal operational area.
Most of the departments that have tried a stubby antenna have gone back to the full size due
to performance. Tell the boys to just put up with the longer antenna.
Jim
alannerd614 wrote:Sorry about that:
800Mhz