50 Watt Professional FM Broadcast Transmitter




50W FM Stereo Broadcasting Transmitter with Audio Processing Front Panel


Suitability

This transmitter is the little brother to our 100 watt transmitter. Using a 150W transistor only running at 50 watts gives it reliability and dependability beyond all imagination. This transmitter is available as a super silent version, see below for details.

Reliability

This transmitter uses a 150 watt mosfet device in it's output only running at 50 watts, this makes it HYPER reliable, it's like a Ferrari on tick over. It will never break and it will handle any amount of antenna faults, high VSWR or reflected power.

Construction

The enclosure is made in strong 16 gauge steel, powder coated and baked in satin black. This leaves a tough, durable surface that will never rot or corrode and be cleaned to shine for decades. The front panel is 19 inch across and 2U (3.5 inch) high with a depth of 12 inches, so it will fit with ease into a standard rack. It is very strong and difficult to damage even under extreme handling.

Frequency, Power and Deviation

The frequency and power level is easy to change, but not so easy that somebody with no experience can just press a button on the front, that would be too easy and dangerous. We reached a compromise with this, we placed these controls on the underside of the unit. To get to them, just slide the unit out of the rack, flip it over and the little dip switches will allow you to change the frequency and a trim pots for the power and deviation level.



Rear Panel of 50W FM Stereo Broadcasting Transmitter with Audio Processing


Five Years! Warranty
5 YEARS LIMITED WARRANTY
more Information

Which Version Do You Need?

The stereo version with audio processing and limiting is available or the straight raw composite MPX version. If you're not sure which version you need, then it's a high probability that need the stereo version with audio processing and limiting. In any case the stereo version has the option of MPX input, it can be used for both. If you wish to connect the unit to external processing such as Optimod, Inovonics, Breakaway, StereoTool etc you should use the MPX version More Information HERE.

STEREO VERSION WITH AUDIO PROCESSING
User Manual

MPX / COMPOSITE INPUT (NO PROCESSING)
User Manual

Super Silent Version

This transmitter is available, for a small extra cost as SUPER SILENT. What is SUPER SILENT? it means it's as quiet as a mouse and can use it in a live mic studio without background noise. Check the video demonstration. If you want SUPER SILENT option, ADD TO CART here.






50W FM MPX Broadcasting Transmitter Front Panel


Antennas

On delivery the equipment is ready to plug in and use with any suitable 50 ohm antenna system such as our:
SINGLE DIPOLE
4.8dBi 2 DIPOLES
7.8dBi 4 DIPOLES
10.8dBi 8 DIPOLES
4.8dBi 5/8 ANTENNA
-0.8dBi CIRC. DIPOLE


Our system package the 50W EIRP system includes this transmitter with a dipole antenna and very low loss LMR400 cable to give you a full system that will comply with the regulations of the European Union and most other countries in the world.

Do You Have A Question?


Compliance

The stereo version with audio processing and limiting meets all the regulatory standards required out of the box and pre configured. In fact if you send us a copy of your permit and it's conditions, we will set it up exactly to the specification. This equipment complies with EU/CE harmonised standards and FCC technical requirements for FM broadcasting. More information HERE

All stated measurements were made at 220VAC at 27 Degrees Celsius ambient temperature unless stated.

RF Specification

Power Output Adj. 1-50 Watts into 50 ohms
Spurious Emissions Less than -75 dB ref to carrier
Harmonic Emissions Less than -70 dB ref to carrier
Freq Stability +/- 1 KHz max. typ. +/-300 Hz
Deviation Sensitivity Stability +/-2 % max
Freq Fine Adj > +/- 1000 Hz
Freq Range 87.5 to 108 MHz in 100 KHz steps
Out of Lock RF Muting Less than -70 dB ref to carrier
Residual AM Less than 0.5 %
Synchronous AM Less than 0.5 %
RF Ruggedness Any VSWR phase or length of time
Output Connector
Operating Temp -20 to +40 Deg C

AF Specification

Pre-emphasis (50 uS/ 75 uS/ None) Selectable
Audio Input Connector Phono/ RCA type unbalanced sockets
Audio Input Sensitivity +4 dBu for +/- 75 KHz dev.

Version MPX Stereo and Audio Processor
Signal To Noise Ratio80dB 65dB
Frequency Response 30Hz-76KHz 30Hz-15KHz
Audio Distortion 0.2% THD Max0.2% THD Max (at MPX section)

AC Specification

Input Voltage 90-264 V AC 135-370 V DC 47-63 Hz
Input Power 95W for 50W RF OUT with RF SWR less than 1.5
Working Humidity 20-90% RH non-condensing
Safety Standards UL60950-1 TUV EN60950-1 BSMI CNS14336 CCC GB4943 J60950-1 approved
EMC Emission Compliance to EN55022 class B EN61000-3-2 3 FCC PART 15 / CISPR22 class B CNS13438 class B GB17625.1
EMC Immunity Compliance to EN61000-4-2 3 4 5 6 8 11 light industry level criteria A
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