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Option with Audio Processing and Limiting

If you want our 100W transmitter with built in audio processing please go to our 100W Stereo Model with Limiters

Simple Exterior, Inside Is Another Story

As with all our transmitters, we like the simple looking exterior, inside is another story. The 100 Watt FM Transmitter has a very high specification and is more than a match in technical quality to any of the other professional FM transmitters on the market at much higher prices. By not including frills such as LCD displays and other gimmicks that don’t improve the sound quality or reliability, we can make this transmitter at a price that is affordable. The previous model of 10 years was in the countries of the world with the worst environments and the hottest climates and it worked great. This new model 100W 19 inch transmitter is even better.

Day In, Day Out, 24/7, Not a Problem!

An MRF151 easily provides 100 watts of power continuously day in, day out, in the main amplifier block (click for temp test results). The amplifier output is low pass filtered to ensure that any spurious and harmonic signals remain within the tough EU spec of -75dB rtc. (Sec 4.11.1 ETS 300 384), this in turn easily puts them within the FCC and Industry Canada spec.

High Reliability

This unit is designed with high reliability in mind. The cooling system incorporates. Two 60 mm fans keep the heatsinks in this unit cool to touch by hand, even when we tested it in Spain in summer at ambient temperatures in excess of 40 deg C for many hours. To maintain long term RF output reliability the linear power amplifier is fitted with a 150 watt Mosfet Device. Due to this design the 100 watt FM transmitter is capable of non-stop operation anywhere in the world with high reliability.

2 Years Warranty

This FM transmitter along with all our other products comes with a 2 year guarantee and our reputation of high reliability. On delivery the equipment is ready to plug in and use with any suitable 50 ohm antenna system such as our Vertical 5/8 Wave, Single Dipole or Stacked Dipole.

Gentle Power Foldback SWR Protection

Under severe load mismatch conditions (poor SWR, Return Loss) the amplifier will automatically foldback the power to a safe level to protect itself, the antenna and cables from damage. When the load becomes good, full power automatically restores. On the front panel is a neat little meter lit up with intense blue LED’s to indicate forward and reflected power. The amplifier is fully protected from poor SWR and reflected power for any duration of time.

The Best For Your Buck!

This is the best value for money and quality 100W FM transmitter you will find in the WORLD!! The units exterior is a steel black powered coated 19 rack casing, very robust and durable. It complies with the ITU specification and will operate with any AC from 90 to 260V. You may think, low price low quality, you would be so far form the truth. If you would like more information on this, internal photos, technical consultation etc, contact us at info@aareff.com and we are more than happy to provide.

Technical Specifications

User adjustable from 87.5 to 108 MHz

RF Power Output
User adjustable from 1 to 100W into 50 Ohm load

Spurious Emissions
Better than -75 dB ref to carrier

Frequency Stability
+/- 1 KHz max typ. +/-300Hz

SWR Ruggedness
Any mismatchany phase angle

RF Output Connector
SO239 or optional N connector at no extra cost.

Audio Input Sensitivity
0.775 V rms for +/- 75 KHz

Signal To Noise Ratio
80 dBu

Frequency Response
Flat from 20 Hz to 15 KHz or 76 KHz for MPX model

Pilot Tone Frequency
19.000 KHz (Crystal Ref) for Stereo Model

Stereo Crosstalk
45 dB

(50uS/ 75uS/ None) User selectable

Audio Distortion
Better than 0.02 % THD

Audio Input Connectors
Phono/ RCA type unbalanced sockets

Physical Dimensions
2U 300 x 482.6 x 88.9 mm

Veronica PLL Driver

The actual RF signal is generated using our Veronica 1W PLL driver internally. This driver is built, designed and proven over many years as the most cost effective high grade FM signal generator on the market, it’s the broadcast engineers choice. You can get more details on this and the specification at 1w-pll-fm-transmitter-kit/

Adjustable 87.5 to 108 MHz and 1 to 100W

By adjusting a small control on the underside panel of the unit the RF power output level can be set smoothly anywhere from 1W to 100W. Any frequency between 87.5 to 108 MHz can be accurately programmed on the internal dip switches. Pre-emphasis time constants of 50uS, 75uS (USA) or none are also easy to select on the underside panel jumpers.