Product Description

FMUSER FU-25A 0-25W Professional FM stereo broadcast transmitte+1/2 wave dipole  antenna+power supply

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FEATURES: CZH-T251 25Watt FM transmitter is a professional FM transmitter newly released by CZH FM Transmitter . It’s featured by one button control for all functions. It has VSWR protection, temperature protection, electronic volume adjusting,equipped with low pass filters. It’s applicable in many places, such as stadium, county radio station, community radio station, motel, public square,church, theater and so on.

Technical Specification
Functions and features:

-215mm x 165mm x 54mm chassis

-Power up to 25 watts

-Using digital phase-locked loop frequency synthesizer (PLL) technology, ultra-high frequency stability.

-Have the standing wave protection, and overtemperature protection.

-Output power from 0 ~ 25W continuously adjustable

-Using the RF power lock feature

-Show the timely output power and various working status.

Electrical parameters:

RF part:

Operating frequency: 87.5 ~ 108MHz

Output power: 0-25Watt (continuously adjustable)

Output Impedance: 50 ohm

Spurious and harmonic radiation:-60db

Audio part:

Frequency response: 50 ~ 15KHz (3db)

Distortion: 0.2%

Left and right channel separation: 45db

LINE IN connector: RCA two-channel Cinch (stereo)

The microphone interface: 6.5mm

Microphone Type: Dynamic microphone (electret microphone is not applicable)

Power supply part:

Rated working voltage: DC 12~13.8V 5A/6A

Maximum power consumption: 60W

Operation Attentions:

1. Make sure the antenna or the Load can be ground connected to transmitter

2. The power supply voltage must be within the allowed range.

3.Make sure the fan ventilation is good

ANTENNA:

Transmitter up to 150w + Cable

A dipole antenna is a radio antenna that can be made of aluminum, copper, and bronze tube with a center-fed driven element. It consists of two metal conductors of rod, oriented parallel and collinear with each other (in line with each other), with a small space between them.

The dipole antenna is a particularly important form of RF antenna which is very widely used for radio transmitting and receiving applications. The dipole is often used on its own as an RF antenna, but it also forms the essential element in many other types of RF antenna. As such it is the possibly the most important form of RF antenna.

A half-wave dipole antenna means the length of this dipole antenna is equal to a half-wavelength at the frequency of operation.

Why do we recommend this dipole antenna?

1).The half-wave dipole is very clear and easy for frequency adjustation, there are scales on the side bar of the antenna from which you can adjust the frequency from 88~108 by 1mhz stepping.

2).The dipole is a simple antenna to construct and use, and many of the calculations are quite straightforward.

3.)The radiation pattern and high gain of dipole:

Radiation pattern of a half-wave dipole antenna,scale is linear.

The Gain of a half-wave dipole (same as above). The scale is in dBi (decibels over isotropic).

SWR diagram of the half wave dipole at 88Mhz

The antenna cable. (we will send cable with BNC connector if no there is no special request. Other option is NJ/TNC connector)

The antenna cable. (we will send cable with BNC connector if no there is no special request. Other option is NJ/TNC connector)

Attention: When setting the antenna, the “Anode” end should be face up, “negetive electrode” should be face down

Electrical specification:

Frequency range: 88~108 MHz ( 1MHz stepping)
Input Impedance Impedance:50 ohm
VSWR <1.5
Gain:3.5 dBi
Polarization: Verticality
Maximum Power Input: 150W
Horizontal 3dB Beam Width:360 °
Vertical 3dB Beam Width:73 °

Mechanical Specifications:

Height: 990mm
Radiating Element Material:Aluminum Alloy
Connector:SL16-K
Holding Rod Diameter: Φ30~Φ40 mm

Package Include:

1* DP-100 Dipole Antenna

1* High quality 8meter BNC cable(If you need other connectors, please tell us before shipping, we also have NJ/TNC connectors)

Package include:

1pc FU-25A FM Transmitter

1pc power supply

1pc 1/2 wave dipole antenna