RM Italy BLA 350 Bedienungsanleitung PDF herunterladen (Seite 12)

16. Precaution

16.1 Removal from packaging and inspection

Carefully remove the amplifier from it’s packaging, and inspect

for any sign of damage incurred during shipping.

With care check each button / switch to check mechanically

they operate correctly.

If any damage is found, note in as much detail as possible the

problem and immediately contact your supplier.

Retain all of the original packaging as this must be used if it is

necessary to return the amplifier to an approved service centre

for any reason.

16.2 Installation

The amplifier must be positioned in a cool and dry area that has

sufficient space surrounding the amplifier to allow good

ventilation to all surfaces and free flow of the surrounding air.

Do not operate the amplifier if it is in direct contact with sunlight.

Do not place books, paper or other objects on the top surface of

the amplifier, and ensure that that the ventilation grilles on the

rear and top panels are free from obstructions. Reduced airflow

due to one or both of these grilles being obstructed can

severely damage the amplifier.

For details of a typical installation of the BLA350 amplifier refer

to Chapter 5. The ALC output from the transceiver connects to

the ALC input (^) of the BLA 350 (refer to Chapter 17.3.1.1 for

the correct setting of the ALC level), The PTT output from the

transceiver should be connected to the PTT input of the

BLA350 (_). In case there is no PTT output from the

transceiver it is still possible to use the amplifier by utilising the

internal VOX circuit activated from a menu. For the best control

of TX/RX switching it is recommend that the PTT input is

utilised. Both the ALC and PTT input connectors are RCA

phono type.

Use a short length coaxial cable, type RG-58A/U,RG-8A/U or

equivalent for the connection between the output of the

transceiver and the input of the amplifier, connector RTX \ ( )

BLA350.

Connection from the output, ANT ([) of the BLA350 to the

antenna should not be made with low power RG-58 type cable

or equivalent, but only with a coaxial cable of sufficient power

rating, for example RG-8A/U, RG-213/U or equivalent.

The transceiver used for the input of the BLA350 must be

capable of a power of 12W to obtain the maximum output from

this linear amplifier.

16.3 Connection to AC supply

The BLA350 amplifier features an internal power supply and

can operate from the mains AC network with a voltage between

200 and 250Vac 50/60 Hz. Before connecting the amplifier

verify that this voltage is in accordance with that specified on

the rear panel of the amplifier (b). …

ATTENTION !!!!

The use of this amplifier with an AC voltage outside

of that stated may cause permanent damage.

The guarantee does not cover damage sustained

from this or from the use of an incorrect fuse.

The BLA350 must be connected directly to the mains AC

network with the supplied AC cable, without the use of adaptors

or other accessories which may cause excessive heating due to

the power requirements of this amplifier. The cables of the AC

supply that the amplifier is connected to must not be smaller

than 1,5 mm² or #15 AWG.

If during operation of the BLA350 it is noticed that the intensity

of the surrounding household lighting reduces, then it is likely

that the AC network cables are of insufficient diameter for the

safe operation of the amplifier.

16.4 ANTENNA

The BLA350 is designed for use with antennas that present a

resistive load of 50Ω at the frequency of operation. In the case

that the antenna does not correspond to this it will be necessary

to use a system of impedance matching such as an antenna

tuner to provide the correct impedance transformation. If using

such a device it must be capable of withstanding the output

level of the amplifier otherwise damage to the matching device

and or the amplifier may result.

16.5 GROUND

This amplifier must be connected to the RF ground system of

the radio station.

Verify that the RF ground of the station is of suitable quality, this

will eliminate noise problems on reception, prevent the build up

of static charge and avoid points of high RF voltages during

transmission on metallic objects that may come into contact

with the operator. To avoid RF interference it can be useful to

use a Ferrite EMI suppressor on all cables connected to the

amplifier. (Clamp on Ferrite cores).

16.6 WARNING!

Dangerous high voltages are present inside the amplifier and as

such we recommend that the cover is only removed by qualified

service technicians. Before removing the cover from the

amplifier, it is essential that the AC power cable, coaxial cables

to the antennas and the transceiver are disconnected.

If during operation it is noticed an abnormal noise or odour,

switch off the amplifier immediately and check all of the

connecting cables and if necessary return to a authorised

service centre for testing. Do not subject the amplifier to

physical shock, high humidity, dusty environments or excessive

heat. Periodically clean any accumulated dust from the amplifier

especially around ventilation grilles with a soft dry antistatic

cloth.

Do not exceed more than 14W on the input to the amplifier.

Excessive drive on the input may cause damage and invalidate

the warranty.

This amplifier features several sophisticated protection circuits

however using the amplifier in a manner other than that

described in the operating instructions may be dangerous to the

user and may cause permanent damage to the amplifier.

Use of the amplifier with an incorrect band filter selected or

without a suitable antenna connected at maximum power may

be destructive to the amplifier.

The internal set-up parameters of the amplifier are adjusted on

an individual basis for each amplifier during a calibration and

test procedure at the factory. Modification of these parameters

will invalidate the warranty.

17. OPERATION

Before use verify that the voltage present on the AC supply

corresponds to that written on the rear of the amplifier. (b).

Verify also that there is a suitable antenna, correctly

adjusted connected to the ANT Connector of the amplifier

(\).

17.1 CW Operation

Due to the switching time of the amplifiers TX RX relays it is not

possible to use Full / Semi Break-in mode when the amplifier is

in use.

The optimum method for sending CW with the amplifier is to put

the transceiver into TX mode manually, either with the MOX

switch on the front panel of the transceiver or an external foot

switch PTT to the transceiver. This allows the PTT relay on the

amplifier to close before sending any characters so that first dot

/ dash of the first character is amplified.

17.2 Initial Settings

If it is necessary to tune the transceiver/antenna before use,

this may be carried out with the amplifier used in Standby

mode. Switch \ to Standby (standby displayed on the LCD

panel [) alternatively the amplifier must be switched OFF,

POWER switch (a).

Before using the amplifier it is necessary to adjust the level of

the ALC voltage for the transceiver. (refer to Chapter 17.4.1.1

for correct adjustment).

Set the front panel controls in the following positions, (with

reference to to paragraph 4):

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