This transmitter is designed around our 19 inch rack 100 watt power amplifier. Following the discontinuation of our previous 100 watt 13.8V DC transmitter, a hole was left in the market to fill as customers still wanted a budget ITU specification transmitter that would operate on 13.8V DC or 115V or 230V AC. It is now here!
We had under estimated the continuing demand and fact that there were over 800 100 watt Veronica Aareff transmitters in use on solar panels, generators and poor AC supplies across Africa and the Middle East. This new 100W 19 inch rack transmitter is now the long awaited replacement. The transmission range of this transmitter used with an high gain antenna
is typically up to 30 miles.
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 was just great, the new model 100W 19 inch transmitter is fantastic.
The actual RF signal is generated using our 1W PLL driver internally. This driver is built, designed and proven over many years as the most cost effective high FM signal generator on the market, it is the broadcast engineers choice. You can get more details on this and the specification at 1w-pll-fm-transmitter-kit.htm
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.
By adjusting a small control inside 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 easy to select on the Internal jumpers.
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. 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.
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. Expensive test equipment is NOT required, set up is a simple task using the internal LED's.
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.
THE SPECIFICATION!
Frequency
RF Power Output
Spurious Emissions
Frequency Stability
SWR Ruggedness
RF Output Connector
Audio Input Sensitivity
Signal To Noise Ratio
Frequency Response
Pilot Tone Frequency
Stereo Crosstalk
Pre-emphasis
Audio Distortion
Audio Input Connectors
Physical Dimensions
User adjustable from 87.5 to 108 MHz
User adjustable from 1 to 100W into 50 Ohm load
Better than -75 dB ref to carrier
+/- 1 KHz max, typ. +/-300Hz
Any mismatch, any phase angle
SO239 or optional N connector at no extra cost.
0.775 V rms for +/- 75 KHz
80 dBu
Flat from 20 Hz to 15 KHz or 76 KHz for MPX model
19.000 KHz (Crystal Ref) for Stereo Model
45 dB
(50uS/ 75uS/ None) User selectable
Better than 0.02 % THD
Phono/ RCA type unbalanced sockets
2U, 300 x 482.6 x 88.9 mm
The prices below are for the different options. It is available as as MPX / mono only model for those stations who want to use there own processor and stereo coding or simply do not require stereo as it is a talk type or similar station. It is also still available in stereo or mono/mpx as a 13.8 V DC model for use on solar panels and batteries in areas where an AC supply is impossible. If you want our 100W transmitter with built in limiters please go to our 100W Stereo Model with Limiters
