4 Watt Transmitter

Vintronic four watts FM broadcast transmitter with digital display, signal indicator, and output tune dial.

£190.00 + postage

Step up your broadcast game with the 4 Watt AM Radio Transmitter — a powerful, reliable solution for medium-range radio broadcasting. Whether you’re managing a community station, organizing drive-in events, or experimenting with hobby radio, this unit delivers the range and clarity you need.

A Vintronic AM broadcast transmitter with a digital display showing 1.052, a signal strength indicator, and a tuning knob.
Electrical control panel with labeled ports and connectors: two terminal screw connectors labeled 'ANT E' with blue and green wires, a 12V power port, a 'TX' port, audio RCA connectors, and a red DIP switch labeled 'FREQ'.
Two vintage Vintronics AM broadcast transmitters, one labeled 'ONE WATT' with a digital display showing 0.00, and the other labeled 'FOUR WATT' with a similar display showing 0.00, both resting on foam padded surface.
An AM broadcast transmitter device displaying a frequency of 1.602.2 on a red digital screen. It has a signal indicator with green and blue lights, a black tuning knob, and is labeled 'vintronics' made in UK. The device is placed on a gray foam soundproofing surface.

4 Watt Unit
Size - 150mm wide, 150mm depth, 75mm high
Weight. - 1Kg
Power requirement - DC 17 V @ 1A max
Audio input and output 

RCA Phono sockets, left and right audio between 75mV and 775mV RMS (Bluetooth optional)
Audio Bandwidth (- 3dB) - 70Hz to 6KHz
Modulation level – up to 100%
RF Output level – 4 to 5 Watts (dependant on Aerial Match)
RF Output Capacitor – 300pF variable (300v rated 4W)
RF connection – screw terminal for signal and earth connection

Display
Signal level – 10 segment Bar-Graph multi-colour LED
Frequency – 4   7-segment LED display
Ventilation - Cooling fan forced airflow

Technical Comparison

A vintage radio frequency transmitter with a digital display showing 1494, a signal indicator with bars, a tuning knob, and branding that reads Vintronic, made in the UK, designed for FET output and AM broadcast transmission.

1 Watt Unit

Size - 150mm wide, 150mm depth, 75mm high
Weight. - 0.9Kg
Power requirement - DC 12 V @ 800mA max
Audio input and output

RCA Phono sockets, left and right audio between 75mV and 775mV RMS (Bluetooth optional)
Audio Bandwidth ( - 3dB) - 70Hz to 6KHz
Modulation level – up to 100%
RF Output level – 1 to 1.5 Watt (dependant on Aerial Match)
RF Output Capacitor – 370pF variable
RF connection – screw terminal for signal and earth connection

Display
Signal level - 10 segment Bar-Graph multi-colour LED
Frequency – 4  7-segment LED display Ventilation – passive convection

A vintage vintronics radio transmitter with a digital display reading 1.152, a signal level indicator, and an output tuning knob.

4 Watt Unit

Size - 150mm wide, 150mm depth, 75mm high
Weight. - 1Kg
Power requirement - DC 17 V @ 1A max
Audio input and output 

RCA Phono sockets, left and right audio between 75mV and 775mV RMS (Bluetooth optional)
Audio Bandwidth (- 3dB) - 70Hz to 6KHz
Modulation level – up to 100%
RF Output level – 4 to 5 Watts (dependant on Aerial Match)
RF Output Capacitor – 300pF variable (300v rated 4W)
RF connection – screw terminal for signal and earth connection

Display
Signal level – 10 segment Bar-Graph multi-colour LED
Frequency – 4   7-segment LED display
Ventilation - Cooling fan forced airflow