AMERITRON AL-82 사용 설명서 - 페이지 10

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AMERITRON AL-82에 대해서도 마찬가지입니다: 사용 설명서 (16 페이지)

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CW PROCEDURE

Follow these instructions in numerical order. If the various

meter readings are different than indicated, check the con-

nections from the exciter to the amplifier and make sure they are

correct. Consult the manual for the exciter.

Be sure the transformer is correctly installed and wired for your

line voltage. See the "Transformer installation" section on page

4 and 5 for wiring details.

1. Set the AL-82 front panel switches as follows:

POWER TO OFF

OPR-STBY TO STBY

SSB-CW TO CW

MULTIMETER TO

2. Plug the AC line cord into the proper voltage outlet.

3. Set the Power Switch to the ON position. The meter lamps

should light and the blower should start. Read the 4000 volt

scale on the Multimeter. It should indicate 3600 volts

nominal and no more than 3700 volts.

4. With the amplifier still on STANDBY, tune the exciter into a

normal 50 ohm load according to the manufacturer's

instructions. Turn the exciter drive fully down after tuning.

5. Place the amplifier mode switch in the CW position, the

bandswitch on the same band as the exciter, the PLATE

control in the dial range for the band selected and the load

control as indicated:

OPERATION

6. With exciter drive still at zero, place the MULTIMETER

switch in the Ip position. Observe the 1000 mA scale. The

meter should read zero (0). Place the STBYOPR switch in

the OPR position.

7. Key the exciter (no drive) and observe the plate current on the

1000 mA scale. It should be 75 mA. Place the CW-SSB

switch in the SSB position. Plate current should now read

150 mA. Return the CW-SSB switch to the CW position.

Note: The no drive currents will vary up to 25% due to

component and line voltage tolerences.

8. Apply only enough drive to indicate a grid current of 100 mA

or an Ip of no more than 500mA. Tune the PLATE control

for maximum output power or grid current. It is normal for

the plate current to dip at this point. If the grid current goes

over 150 mA, reduce the drive at once. Unkey the exciter.

9. Place the MULTIMETER switch in the PO position and

observe the 2000 Peak RF Watts scale. Increase the drive

until 200 mA of grid current is indicated. Adjust the LOAD

and PLATE controls for maximum output. The grid current

may be lower now.

10. Advance the drive to 250 mA of grid current. Adjust the

LOAD and PLATE controls for maximum output power.

The output should be over 1000 watts now.

11. Apply enough drive to indicate either 1500 watts of output

power or 300 mA of grid current. Re-peak the LOAD and

PLATE controls. The final grid current should be around

250 mA and the plate current below 900 mA.