Eagle 2000 – 2kW FM Broadcasting Amplifier
User’s manual – Page 21 of 66
that the Eagle 2000 internal fans are low-pressure units and therefore an air extractor on the air exhaust duct in definitely
needed.
•
Air conditioning at 20 – 25 °C would obviously be the best solution. Thermal insulation and efficient ventilation with a
thermostat-controlled blower are generally the best solution.
•
Even moisture and/or dust, when excessively present in the air or in the room, may cause condensation build-up in the
amplifier. If the system is periodically switched on and off, this can trigger destructive electric arcs and short circuits and thus
cause damage which is not covered by warranty.
6.3.c Electrical
conditions
•
Eagle 2000 is powered by a single-phase line. The power grid capacity should be configured and dimensioned to suitably meet
(with a sufficient safety margin) the consumption needs of the device.
•
The single-phase AC power line nominal voltage range comes from 180 to 240 V
AC
. For further details about the AC power line
Ö
5.1.
•
Fluctuations of the power line and electric discharges due to weather or nearby industrial machinery may cause significant
trouble, especially in mountain areas and in locations close to industrial areas.
•
In many cases, it is advisable, if not mandatory, to install a protector, an insulating transformer or possibly an
electromechanical AC power voltage regulator.
Since the total cost of the plant, inclusive of broadcasting equipment, antenna system and installation is rather high, a certain
percentage of the budget should be evaluated for buying and installing suitable protection and conditioning facilities as
described above. It has to be considered that such additional costs will be absorbed very quickly since the equipment will work
under ideal conditions, its useful life-span will increase and, above all, the incidence of accidental breakdown due to
environment or power line trouble will be reduced.
6.4 Connecting
the
equipment
6.4.a
Connecting the antenna
•
A 7/16 output connector is fitted to the rear of the amplifier module. It’s very important to check that antenna, cables and
connectors are suited for 2kW.
•
The antenna divider is also expected to have adequate power. Its input connector must be 7/16 or larger.
•
As a rule, the cable connecting the amplifier to the antenna must be of the corrugated, sponge dielectric type, or 7/16 Cellflex
and Flexwell cables. Smaller cables cannot be used.
•
The antenna will be earthed through a copper braid of suitable cross section to prevent lightning or static electricity from
reaching the amplifier through the antenna cable.
6.4.b
Connecting the AC power line
Wire the power supply connector of the equipment to a suitable single-phase (nominal voltage 230V
AC
) power supply source.
,
Before connecting the power supply cable, make sure that the amplifier will be compatible with the power supply
source you are planning to use.
,
The power supplied by the AC power socket must comply with what stated in the paragraph
6.3.c.
,
Operation near the lower input voltage on high impedance lines must be avoided: if the power line voltage drops
below a certain limit at full load, the low line sense circuitry may trigger an oscillating turn-on/turn-off cycle, which is
very dangerous. In this case, it is advisable to use an external line stabilizer.
,
In order to ensure proper operation and comply with the safety regulations, an efficient connection to earth is
required. Use the yellow/green lead in the power cable. The cable neutral lead is blue. Never connect the earth to the
power line neutral lead.
,
Use only the power supply cable supplied with the amplifier. In case of a cable extension, recommended values are
2.5 to 4 mm
2
.
,
Never switch the equipment on without an antenna connection, even with no R.F. driving.
