DRAKE PS7 1502 Buku Petunjuk - Halaman 4

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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.

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

o n l y with another fuse of the same type and rating.

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