Retekess FY4409A Portable FM Broadcast Transmitter User Guide
- June 4, 2024
- RETEKESS
Table of Contents
Retekess FY4409A Portable FM Broadcast Transmitter
Specifications
- SPECIAL FEATURE: Portable, Longe range
- SIZE: FT11 transmitter
- BRAND: Retekess
- CONNECTIVITY TECHNOLOGY: Auxiliary, USB
- INPUT DEVICE INTERFACE : USB, 3.5mm Jack, TF Card
- POWER SOURCE: Battery Powered
- BATTERY: 2000mAh
- AUX: 3.5mm
- PRE-EMPHASIS: 50us/75us
- OUTPUT IMPEDANCE: 50Ω
- SNR: ≥70dB
- SUPPORT MP3 FORMAT: FLAC, WAV, WMA, MP3
- SUPPORT: micro SD card (Maximum support 32GB)
- CHARGE: DC 5V 1A, Micro USB jack
- ITEM WEIGHT: 2.8 ounces
- PRODUCT DIMENSIONS: 3.9 x 0.6 x 2.2 inches
- BATTERIES: 1 Lithium Ion battery
Introduction
It has a pocket-style design, is lightweight and portable at 0.17 lbs., and has a maximum transmission range of 200 meters. Long operating time, excellent performance offered by a 2000mAh polymer lithium battery incorporated into the radio transmitter, and faster charging speeds supported by a USB cable with a strong copper core. Because of its built-in condenser microphone, digital audio processing, and support for external condenser microphones, this radio transmitter provides a clear sound quality and excellent sensitivity. The radio transmitter may play music from your phone to the FM receiver by supporting TF card and AUX line-in with a 3.5mm male to male Aux cable.
The entire public FM spectrum is available for transmission; a single transmitter can connect to a large number of FM receivers; if you wish to add more tour guides or simultaneous interpreting spaces; just carry out your needs yourself.
HOW TO INCREASE FM TRANSMITTER RANGE
The RF signal from the transmitter is often amplified using transistors (and/or tubes). Using a larger, taller, more effective, or directional antenna can occasionally be the least expensive solution to extend range.
HOW TO CALCULATE RANGE OF FM TRANSMITTER
The only method that is direct is to measure the voltage at the antenna. The output power will be 4/37 = 108 mW if your antenna is a quarter-wave monopole, which has a radiation resistance of around 37 ohms and 2 V RMS (VHF/FM).
HOW TO MAKE FM TRANSMITTER NOT STATIC
By adjusting the radio in your car to the FM transmitter, you may get rid of the static. Select non-channel frequency on your FM transmitter and get it ready. Turn on the radio in your car and enter the same non-channel frequency. Turn on your FM transmitter once they are both tuned to the desired number to eliminate static.
HOW TO STOP FM TRANSMITTER FROM BUZZING
With a radio receiver, look for a blank frequency. Then, to use, switch the broadcast transmitter to the blank frequency. F, In order to lessen the hum noise, you could also try reducing the power and connecting a Ground wire from the antenna connector to the PA mixer board.
Frequently Asked Questions
Will this return to the last setting when turned off and back on?
Yes. When you turn it off and back on, the last setting is still there, you don’t need to reset it.
Does this meet fcc part 15 rules? i.e. is it legal?
Yes.
Can this still work while it’s plugged into power to keep it going?
For this Retekess FT11 transmitter, it works while it’s plugged into power, but it may affects the battery life.
What is the Wattage?
1 mW to 300 mW. The Max power seems to depend on the FM frequency. We find at about 100 MHz the little transmitter has a range of about 600 feet or a city block.
Which languages does this translate to? I see mostly Chinese, but I want translation to Spanish. can you do several languages at once?
I am sorry to tell you that this is an FM transmitter, it has no translation function. But our tour guide system can meet your needs,ASIN:B071HXVB7M,B071VW1V3B,B072FKPHHV.
Is this transmitter also a receiver? Or transmitter only? TY
This Retekess FT11 portable FM transmitter can only be used as a transmitter, you can use any FM radio as a receiver, such as Retekess TR101, V112, TR612, PR13 FM radios, ASIN:B07FD8PMHC, B019BYBR48, B088T6SV61, B01M9B10V5.
Can you download music to it?
Yes, you can download music to SD card.
Can I use two of these transmitters each with its own audio signal and have the ability to switch between both audio signals from a retekess pr13?
Yes, you can. You just need to set the frequency of the two FT11 transmitters to different frequencies, then your clients can tune the PR13 FM radio to the corresponding frequency to switch between both audio signals.
Bluetooth interference? new phones have a 3.5 or other audio output, so bluetooth only @ 2.4ghz has anyone successfully used this with bt receiver?
For this Retekess FT11 transmitter, It can be connected to 2.4GHZ RT receiver with 3.5mm male to male Aux cable.
Can i input two different audio signals into this and send both signals to a retekess pr13?
Please kindly note that one transmitter can only transmit one audio signal, if you want to transmit two different audio signals, you can use two FT11 transmitters and set their frequencies to two different frequencies, then your clients can tune the PR13 FM radio to the corresponding frequency to listen to the signal they want to hear.
Can i use two of these transmitters each with its own audio signal and have the ability to switch between both audio signals from a retekess pr13?
Yes, you can. You just need to set the frequency of the two FT11 transmitters to different frequencies, then your clients can tune the PR13 FM radio to the corresponding frequency to switch between both audio signals.
If i have two of these each receiving a different audio signal, can a retekess pr13 switch between both audio signals?
Yes, you just need to tune the PR13 FM radio to the corresponding frequency to switch between both audio signals.
If i plug this into a pc to broadcast Christmas music for my light display, will it work?
Yes, this FT11 portable FM transmitter can meet your needs.
Can this be ran from the charger full time?
This products with Lithium battery, if you ran from the charger full time, which will reduce battery life
I want to use it for like a small drive in theater in our front yard. Would this work for that?
Yes, you can use it. And it’s maximum transmission distance is 200 meters.