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COMET
CFM-95SL
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Antena
omnidireccional FM de 5/8 de onda
Lo habíais
pedido y ya está aquí. Por fin, una antena FM de calidad a un
precio razonable.
La antena Comet de 5/8 de onda es una antena
comercial de calidad profesional que ofrece 3,4 dBi de ganancia. Diseñada
teniendo en cuenta las necesidades de una emisora de potencia baja,
el modelo CFM-95SL ofrece una calidad y un rendimiento excepcionales
a un precio incomparable. Esta antena viene con las características
técnicas y la fabricación precisa que nos caracteriza, lo que hace
que sea una antena muy recomendada para los transmisores FM de la
serie MAX.
Características:
Rango
de frecuencia: 88-110 MHz (Ajustable)
Impedancia: 50 ohmios
SWR: 1.5:1 máx
Ganancia: 3.4 dBi
Ancho de banda: 3 MHz
Potencia máxima: 200 vatios
Longitud: 4'8" - 6' 1"
Peso: aprox.
2,5 libras
Conector: SO-239
Velocidad máxima del viento: 134 mph
Diámetro de la antena: ,9-2,25"
Para comprar o accesorios consulte Accesorios a la izquierda de esta página.
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STACKED DIPOLE ANTENNA
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Dipole antenna (single or phased configurations)
Our choice for broadcasts of up to 300 Watts. Weather sealed for long term durability in all climates. DC short for lightning and static protection. Comes supplied with boom arm.
The folded dipole is the perfect antenna for stations that require a truly professional antenna for their broadcasting. No tuning or adjustment is needed for any frequency on the band which makes this antenna the only one to use if you plan to move your transmitters frequency often. Completely hermetically sealed with a full all weather warranty - you can be sure this antenna won't let you down, making it our choice for commercial sites where access is difficult.
For higher power handling you can stack these antennas with the 2 and 4 way phasing harness' to make 2 and 4 bay antenna systems easily handling over 1KW of power.
Technical specifications:
MAX Power handling: 300 Watts for single dipole, 600W for two and 1200 for 4 bay version
Impedance: 50 ohms
Gain: 0dBd (single)
VSWR: better than 1:1.5 (88-108MHz)
Freq. range: 88-108 MHz(no tune)
Connector: N-type Male
Dimensions: 1600mm(height) x 150mm x 35mm
Weight: 2Kg
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HIGH
GAIN 3/4 wave vertical
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HIGH GAIN 3/4 wave
FM omnidirectional antenna
This is a redesigned standard 3/4 wave antenna to provide
even higher gain. Preliminary testing of the antenna indicated a small
increase in gain could be seen when the main radiator was made a little
longer then the calculated 3/4 wavelength. This adds inductive reactance
to the antenna and a few tenths of a db in gain once the gamma match has
been retuned to 50 ohms impedance. We knew the increase in gain would
be small by making the antenna longer and if we passed the optimal length,
we would destroy the antennas performance altogether. We decided it would
be worth the time to conduct further field tests and find this ideal length
to extract every last bit of performance possible from any single omni
directional antenna offered on this band. Using our exclusive formula
we can now calculate the ideal length that provides maximum gain based
on our customers frequency. High performance 3/4 wave antennas are not
typically seen on any band because the 3/4 wave presents some interesting
problems when it comes to impedance and angle of radiation. The typical
90 and 45 degree downward radials used on most smaller ground planes are
capable of providing a good 50 ohm impedance but they also give a very
high angle of radiation when used on the 3/4 wave. This wastes the added
gain of the 3/4 wave by allowing a good deal of your signal to go up rather
then out. Our innovative cone shaped ground plane structure on the 3/4
wave overcomes this problem and will refocus the energy so that it projects
out into the distance and not up into space. A quick look at the picture
showing the radiation patterns will make it easy to understand how this
affects range when compared to other antennas. Our 3/4 wave has an impressive
gain figure better then 6 db over a half wave dipole and more then 9 db
over a circularly polarized antenna. The typical 100 watt LPFM station
using a circularly polarized antenna has to run the transmitter at about
225 watts output in order to achieve the 100 watt ERP level because the
CP antenna has -3.2 dbd. Since our antenna has a power multiplication
factor of four times you would only need 25 watts of RF to reach the full
100 watt ERP level! This can provide a significant savings since many
exciters produce 25 watts and would not require the expense of an RF power
amplifier. The antenna uses a highly efficient Teflon insulated gamma
match that eliminates any coils or matching transformers and allows us
to shunt feed the 3/4 wave main radiator while keeping it DC grounded
for added lightning protection. Another advantage this antenna has is
it's ability to handle high power levels. The weakest link in the chain
is the coax connector and our standard model offered in this auction uses
a gold pin Teflon insulated weatherproof N connector recommended for up
to 1 KW. A simple $50 upgrade using a 7/8 connector brings the power handling
to 2.5 KW. For commercial operators seeking an excellent backup antenna
that can handle full power we offer a special order 10 KW version. This
model replaces the gamma match with a sealed Jennings vacuum variable
capacitor and uses an EIA flange connector making it virtually impossible
to burn out. Your antenna will be precisely tuned for your frequency and
shipped assembled so you get a perfect SWR match. You simply slide the
telescopic main radiator sections out of the base to the premarked spot,
tighten the stainless steel clamps and connect the coax. Complete instructions
are included for easy retuning in the field should your transmit frequency
make a major change in the future. We have invested lots of research and
development time into this antenna and are willing to stand behind it
with a great guarantee. If the antenna you use now didn't cost thousands
of dollars, replace it with ours. If anything should fail within two years
send it back for free repairs or retuning if you would rather us do it.
Give your signal some punch and try our antenna at no risk to you. Antena
specs are as follows. Approximate height is 9 feet (depends on frequency).
Wavelength is 3/4 wave. Gain over half wave dipole is better then 6 dbd.
Power handling capacity is 1 KW on the standard model (2.5 KW with $50
upgrade) and 10 KW on the special order high power version. Bandwidth
is 5 MHz. wide with a perfect 1:1 SWR at the center tuned frequency. Wind
survival is greater then 100 MPH. Wind load is .7 square feet. Weight
is 8 pounds. Radiation pattern is low angle omni with vertical polarization.
Antenna is DC grounded for excellent lightning protection.
Features:
Frequency range:
88-110MHz (Tunable)
Impedance: 50 ohms
SWR: 1.1:1 max
Gain: 6 db over a half wave
dipole, more then 9 db over circularly polarized antenna
Bandwidth: 5MHz, easily tunable
Max. power: 1000 Watts (with modification up to 10KW)
Length: 9 feet
Weight: Approx.
8 pounds
Connector: N
Max. wind speed: > 100 mph
Wind load: .7 square feet
Para comprar o accesorios consulte Accesorios a la izquierda de esta página.
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ANTENA
DIRECCIONAL DE BANDA ANCHA YAGI
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Antena
omnidireccional FM de 1/4 de onda
La
antena CD95Y FM Yagi de Creative Design ofrece 6 dB de ganancia
delantera en un modelo direccional con 20 MHz de ancho de
banda. Esto significa que no se necesita ningún tipo de ajuste desde
88-108MHz. La SWR típica es de <1.5:1 a través de la banda.
Admite hasta 500 vatios. Puede montarse horizontal o
verticalmente. Proporciona un porcentaje delante-detrás de >15dB. Utiliza
una conexión a tierra DC para una mayor protección. Está
construido con aluminio de alta calidad para soportar mejor las
inclemencias del tiempo y viene con una línea de alimentación de
trenza RG-8/U con S0-239 y hardware de montaje.
Incluye un año de garantía
Características:
Rango de frecuencia: 88-108 MHz (Banda ancha)
Impedancia: 50 ohmios
SWR 1.5 : 1 máx.
Ancho de banda: 20 MHz
Ganancia delantera: 6 dB (F/B con porcentaje 15)
Potencia máxima: 500 vatios
Longitud : 5'
Ancho (desempaquetada): aprox. 4,5 Kg.
Material de construcción : aluminio estirado
Conector: SO-239
Velocidad máxima del viento: 134 MPH
Para comprar o accesorios consulte Accesorios a la izquierda de esta página.
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MLB-6600
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Antena
omnidireccional FM de 1/4 de onda
El modelo MLB-6600 es una
antena de un cuarto de onda que se usa en las bandas de 66 a 132
MHz. Proporciona un gran rendimiento para una amplia gama de
aplicaciones de recepción en la banda de emisión FM, al tiempo
que mantiene una velocidad de potencia de 200 vatios para la
transmisión. Viene con un conector PL-259 y un coaxial RG8 de 5,5
metros. Incluye una garantía exclusiva de devolución del importe en
30 días y una garantía de 1 año entero.
Características:
Rango de frecuencia: 66-131 MHz (Ajustable)
Impedancia: 50 ohmios
SWR 1.5 : 1 máx.
Ancho de banda: 3 MHz
Ganancia nominal : 0 dB (unidad)
Potencia máxima: 200 vatios
Largo 2' - 4'3"
Ancho (desempaquetada): aprox. 700 gramos
Construcción muy limpia
Conector: PL-259
Velocidad máxima del viento: 134 MPH
Para comprar o accesorios consulte Accesorios a la izquierda de esta página.
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RPL
0205
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Antena
de ancho direccional
Su
fabricación precisa, sus excelentes características técnicas y su
funcionamiento de ancho de banda sin ajuste, hacen que esta antena
direccional sea muy recomendable para todos los
transmisores FM MAX. No olvide que se trata de una antena
direccional de 6 elementos que emite radiaciones de la mayor parte
de la potencia en una dirección, de donde proviene la amplificación.
Características:
ALTA GANANCIA de 6dB
Funcionamiento sin ajuste del ANCHO DE BANDA
Fácil de montar/desmontar (1/2 hora)
Precio atractivo
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