PS-7 POWER SUPPLY, MODEL 1502
General Description
The
PS-7
is a
13.6
volt, DC regulated power supply capable of de-
livering up to
25
amps of continuous current. Excellent voltage
regulation is provided by a silicon monolithic integrated circuit
and associated circuitry. Output voltage and current are adjust-
able with internal controls which have been factory set to provide
13.6 volts at up to 25 amps. Other features include short circuit
and overvoltage protection and programmable primary voltages.
An auxiliary 13.6 V D C output is provided on the rear panel and
is fused internally at I amp. Primary voltages of 100, 120, 200,
and 240 VAC, 50-60 Hz may be used with the PS-7 and may be
quickly changed via the programming switches. For demanding
duty cycles, such as extended RTTY or SSTV transmission, the
model 1529
FA-7
Cooling Fan is recommended for additional
cooling, especially at ambient, temperatures above 25°C.
Current Overload Protection
When the PS-7 is subjected to a current overload or short circuit
condition, the regulator circuit will automatically shut down. The
unit may be reset by momentarily switching the ON-OFF switch
on the TR-7 to OFF or by removing the AC primary voltage to the
PS-7. The power transformer is protected by an 8 ampere type
ABC fuse on primary voltages of 100 or
120
VAC or a 4 ampere
type
M
T H
fuse on
200
or
240
VAC. Refer to Figure 1 for location
on the rear panel.
This f u s e should he rcplaced with another fuse
of the same type and ratin g
The auxiliary DC output is intern-
ally fused with a 1 amp type MDL fuse. This is located inside the
unit, on the regulator P.C. board.
This fuse should be replaced
only with another fuse of the same type and rating.
10-8-79
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