Elenos s.r.l. radio transmitters
Victor Polevoy

The Lega Ltd Company presents radio and TV broadcasting equipment (including transmitters) series in the Russia and CIS market. Lega Ltd’s motto is "We know the equipment we offer!"

Radio broadcasting transmitters are represented by equipment series manufactured by the Italian Elenos s.r.l. Company. The series includes transmitters with output power of 10 W...30 kW, designed for operating in 87,5...108 MHz and 65...74 MHz bands (up to 1 kW).

The ETG mono block radio transmitters series of 10...1000 W is characterized by compactness, good parameters, high reliability, and relatively reasonable cost. The transmitters are easy to control. They have liquid-crystal display providing information about the transmitters’ functioning. For instance, there are three ways of indicating frequency deviation, including the statistical diagram. Output power display has high measuring sensibility.

One-unit exciter ETG500

• bandpass flatness ±0.15 dB (30Hz: 15KHz);
• stereo separation > 65 dB (typical value 72 dB) 1000 Hz;
• signal-to-noise ratio 70 dB.

Synthesizer allows fast actual frequency measuring without any additional settings, with all parameters (including nominal value of input signal level equal to 75 kHz deviation) being retained.

The new line of transmitters with output power of 2000 and 4000 W employs transistorized E2000 amplifiers of 2 kW. The amplifiers are manufactured in two versions: having either transformer-type power feeder (TR) or direct mains switching power feeder (DR).

The E2000 DR version has low mass and high performance factor owing to the direct mains switching power feeder. The power feeder design allows operating at single- or tri-phase at 110, 220 or 380 V. The microprocessor control system provides maximum performance factor by means of automatic control of the power feeder efficiency.

The TR E2000 version, having traditional transformer-type power feeder, has been designed for operating at 220/380 V and may be used in cases when there is no insulating transformer in the supply line.

The E2000 amplifiers have the microprocessor system of protection and automatic mode adaptation, thus providing their high reliability. Even under extreme working conditions, the microprocessor corrects operating mode providing continuous broadcasting. In the event of the microprocessor’s breakdown, the amplifier can still be run on condition that its other modules operate in acceptable mode. Under regular exploitation conditions, the E2000 amplifier overall output power is over 2700 W, the rating value being 2000 W. Reasonable redundancy and rational construction of the amplifier allow to keep on broadcasting with only one operable amplifying module of the eight available. The E2000 amplifier has a built-in system of telemetry and control through GSM or wire telephone line.

The THX1000 transmitters of 1 kW, basing on the HF1000 crystal amplifier with output power of 1000 W, have been manufactured for many years and are in popular demand. The microprocessor control system provides their stable functioning under real running conditions.

The TRX5000 transmitters of 5 kW, having T5000 tube output stage and ETG500 mono block amplifier, are ideal for radio stations located in metropolises. Long-term exploitation of such amplifiers under various conditions has proved the T5000 tube amplifier to be one of the most perfect in its class.

Crystal amplifier based transmitters are of broadband type, i.e. no additional settings are required in case of migrating to another working frequency, which solves the problem of reservation. In case of migrating to another frequency, the T5000 tube amplifier’s output circuit may be controlled by the buttons in the front panel. This procedure takes several minutes under exploitation conditions.

The equipment, sold in Russia and Ukraine, has all corresponding certificates. The descriptions and manuals are translated into Russian by the specialists having great experience in radio transmitting equipment.

Provided by Lega Ltd.

next >>