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TRANSISTOR
2.2.
REAR PANEL
Signa
l
lnpub
SIGNAL INPUT DC
SIGNAL INPUT AC
10
current limiter. The amplifier will continue to
operate. However, input level must be reduced
to resume operation with a good waveform.
When an output transistor fails, the amber
TRANSISTOR lamp is lit. The input gates are
not affected, and the amplifier will operate
satisfactorily on reduced power output. Tran-
sistors should not be replaced before the
checks of section 3.3.4 have been carried out.
Ph
ase
Fuse
I
L
Exciter Trigger
Amplifier Output
Fig.2.2. Rear Panel of 2707
:.
~
Power
271019
A BNC connector, insulated from the ampli-
fier chassis, is used to give a directly coupled
input. Input impedance is greater than 10 krl.
Full output is produced by a signal of 2-3
Volts RMS.
A BNC connector, insulated from the ampli-
fier chassis, is used to give a capacitive coupl-
ed input. The low frequency cut-off is at
10-15Hz, which gives an inherent displace-
ment limiting.
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