FM Transmitters PFG Series is a range of modular FM transmitters designed to operate in the whole 87.5 – 108 MHz frequency range for FM radio broadcasting, with power range 100W - 40kW.


Each FM Transmitter PFG Series includes the following elements:

  • Exciter.
  • Amplifier.
  • Control logic unit.
  • External cooling unit, in case of liquid cooling system.

Mozart series exciters
All exciters in FM Transmitter PFG Series belongs to the Mozart series, FM Transmitter latest audio excellence. 

FM Transmitter  GREEN RF™ technology
The GREEN RF™ technology, combined with the new 65:1 devices, is the latest evolution of the world-famous patented COLD-FET™ technology applied on FM Transmitter. The main advantages are:

  • High RF efficiency (>70%).
  • Higher safety.
  • Higher reliability.
  • Lower heating.
  • Lower AC power consumption.

Complete remote control
FM Transmitter PFG Series  has an extremely complete Web server, SNMP, GSM or SMS remote control system, available as option.


WiFi touch management
FM Transmitter PFG Series Remote management via WiFi on mobile, smartphones or tablets, as option.

Hot-Plug Solution
FM Transmitter PFG Series over 5kW can be equipped optionally with the hotplug system to instantly extract the amplifier modules with FM Transmitter in full power. All the amplifier modules slide on telescopic rails and can be completely extracted and removed for on-air maintenance or replacement without disconnecting any cable and without interrupting the FM Transmitter operation.

Uninterrupted service
An intelligent protection of the circuit reduces the output power without on-air interruption, keeping the RF devices always within the safe operating parameters in case of:

  • Load mismatching.
  • Environmental over-temperature.
  • Cooling failure.
  • Failure in one or more amplification modules.
  • Failure in power supply modules.

High efficiency cooling system

The air cooling system limits the heat-sink temperature rise to only about 10°C above ambient temperature. This guarantees the properly functioning even at high temperatures and in sites with extreme climate conditions.

Air cooling
FM Transmitter PFG Series oversized air cooling system widely extends transistor life. The amplifier modules are equipped with external redundant fans to allow easy and fast cleaning or replacement, without opening or removing any module and without interrupting the FM Transmitter operation.


Liquid Cooling
An oversize heat exchanger, single or double*,  suitable for outdoor or indoor installation, and equipped with single or double*  pump system for maximum redundancy, is the main component of the powerful liquid cooling system.
FM Transmitter PFG Series liquid cooling system assures high reliability, cooling efficiency and easy installation, thanks to the special design of liquid cooled heat-sinks inside the amplifier and low pressure liquid distribution. This system is designed to successfully face every hard climate condition.

* optional

FM Transmitter PFG Series  : advantages of liquid cooling
Substantial advantages of our liquid cooling technology compared to air cooling are:

  • Properly working even with hard climate conditions.
  • Dramatically reduction of air conditioning.
  • Proper functioning in dusty environment even with high humidity or salinity.
  • Very low acoustic noise.
  • Low heat radiation into the environment.
  • Longer life for transistors and active elements due to colder continuous operation.

AAD Technology
Prevents corrosion from air moisture and increases reliability.

  • Components are made in anticorodal aluminum.
  • Air is ducted to avoid contact with electronic parts.
  • All electronic boards and cablings are tropicalized with a special resin to protect the circuits against salt air.


FM Transmitter PFG Series design was optimized to get minimum losses of the passive elements and excellent performances of the active elements to increase the AC efficiency up to more than 70%.






PFG 100

100 W


19" x 3U

No rack

PFG 300

300 W


19" x 3U

No rack

PFG 500

500 W


19" x 3U

No rack

PFG 1k

1000 W

DIN 7/16

19" x 3U

No rack

PFG 2k

2000 W

EIA 7/8"

19" x 4U

No rack

PFG 3k

3000 W

EIA 7/8

19" x 4U

No rack

PFG 6k/1x

6000 W

EIA 7/8"

19" x 5U

No rack

PFG 6k/2x

6000 W

EIA 1+5/8"

19" x 19U

19" x 19U

PFG 8k

8000 W

EIA 1+5/8"

19" x 24U

19" x 24U

PFG 10k/2x

10 kW

EIA 1+5/8"

19" x 31U

19" x 31U

PFG 10k/4x

10 kW

EIA 1+5/8"

19" x 31U

19" x 31U

PFG 15k

15 kW

EIA 3+1/8"

19" x 41U

19" x 41U

PFG 20k

20 kW

EIA 3+1/8"

19" x 45U

19" x 45U

PFG 30k

30 kW

EIA 3+1/8"

2 racks of 19" x 41U

2 racks of 19" x 41U

PFG 40k

40 kW

EIA 4+1/2"

2 racks of 19" x 45U

2 racks of 19" x 45U


Frequency range

87.5 to 108 MHz adjustable with 10kHz step

Output impedance

50 Ω

Deviation capability

±75 kHz, up to ±200 kHz with distortion < 0.5%


0, 25, 50, 75 us (selectable)

Synchronous AM (ref. 100% mod.)

< - 58 dB

Asynchronous AM (ref. 100% mod.)

< - 50 dB

RF Probe

-50 dBc, 50 Ω, BNC

Power stability

< 2% (ALC)

DC to RF efficiency

83% typ.

Modulation monitoring

BNC connector

Pilot tone

Phase and Amplitude adjustable from display and WEB interface

Log file

Up to 200 dated events memorized in the transmitter memory, accessible from display and WEB interface


Modulating input signal

Mono, Stereo (Left, Right, Left + Right), Encoded stereo (MPX), SCA, RDS, AUX, Digital AES/EBU

Input connectors

Left (XLR connector), Right (XLR connector), MPX (BNC connector), SCA (BNC connector), RDS (BNC connector), AUX (BNC connector), AES/EBU (XLR connector)

Audio input levels for ± 75 kHz deviation


Adjustable from -9 to +18 dBu


Adjustable from -9 to +18 dBu


Adjustable from -6 to +6 dBu or from +6 to +18 dBu (selectable at order)


Adjustable from -15 to 0 dBFS

Input sensitivity adjustment

With 0,05dB steps by front panel display interface or by WEB interface


It can be enabled/disabled and adjusted from 30 kHz to 180 kHz by front panel display and WEB interface

Internal RDS coder

Synchronized with the 19kHz pilot of the internal stereo coder or the 19kHz pilot of an external MPX signal


AC supply voltage

115 / 230 VAC ± 15%, single-phase or 230/380 VAC ± 15%, three-phases

AC supply frequency

50 Hz or 60 Hz, ±5%

Power factor

> 0.9



Forced air with built-in axial fans / Liquid cooling (optional)


Continuous 24/24h

Operating temperature

-5°C to +45°C Derate 3°C per 500 m above 2000 mt asl

Relative humidity

Up to 95%


DB Elettronica Telecomunicazioni S.p.A.

VAT Number IT00710830282

REA PD N.131067


Riviera Maestri del Lavoro, 20/1 - Padova - 35127 Italy
Tel: +39 049 8700588 - Fax: +39 049 8700747
E-mail :

© 2015 DB Elettronica Telecomunicazioni S.p.A.. All rights reserved.