Skanti TRP 5000, Инструкция по эксплуатации

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Note: Extreme care must be taken as high tension is now accessible.
4. Key the transmitter and adjust I
1
by means of 254R1 (right) to 1.4 on
the meter scale.
5. Key the transmitter and adjust
I
2
by means of 254R3 (left) to the
same value.
6. Keep the transmitter keyed for a period of 5-10 minutes and repeat
points 4.and 5. if necessary.
7.8.3 Adjustment drive voltage:
Due to the spread in valve characteristics it may also be necessary to
re-adjust the grid drive to the valves.
Adjustments are made separately for the CT-band (1.6 to 4 MHz) and each
HF-band by means of the Level Setting potentiometers on printed circuit
board /233\ in the Exciter. These become accessible by removing the lid
of the screened can below the chassis.
The potentiometers are adjusted so that a maximum valve current of
between 165mA and 175mA is obtained per valve with POWER switch set to
FULL and TUNE button pressed. This corresponds to a deflection of
between 3.0 and 3.2 on the built-in meter with the CHECK SWITCH (pulled)
in position 11 and 12
. Note that maximum current is obtained when the
ANTENNA TUNING is de-tuned. If the two currents vary slightly, the
highest reading must not exceed 3.2.
7.9 Adjustments
The following sections describe alignment procedures for printed circuit
boards that contain adjustable components. Bear in mind that no adjust -
ments should be carried out unless there is a clear indication that it
is really necessary. Moreover, adjustments should be carried out only by
qualified technician with the necessary equipment at his disposal.
When a unit or printed circuit board is replaced, adjustments a re in
some cases necessary. These cases are listed in the table blow.
Replacement of
unit or board Adjustment
required of Procedure given
in section
E 5000/E 5001
/232\
/233\
/234\
T 5000
/254\ Level Setting
232R15
Level Setting
232R15
Level Setting
Antenna Tuning
Quiescent current 7.8.3.
7.10.2
7.8.3
7.10.2.
7.8.3
3.14
7.8.2