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D B Assembly Apu Power Supply Series R-14/28-25

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Cessna / Universal 3-Pin Cessna / Universal 3-Pin + Piper Round Cessna / Universal 3-Pin (Euro) Cessna / Universal 3-Pin + Piper Round (Euro)
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Overview

The D B Assembly, Inc R-14/28-25 APU is designed to operate avionics equipment in private and commercial aircraft.

The R-14/28-25 will output 14 or 28 volts DC at up to 25 amperes. The voltage is filtered to eliminate hum and is regulated against input AC line voltage changes.

The output DC voltage and current are displayed on front panel meters. The DC is also protected by a circuit breaker.

Selection of output voltage is by a front panel switch, which is protected by a switch guard. Closing the guard forces the switch to the 14-volt position.

The RB-14/28-25 plugs directly into the APU receptacle on the aircraft. It comes equipped with either the standard three-prong connector or the Piper coaxial connector. Both connectors can be supplied, optionally at a slight extra cost. DC cable length is 8'.

The AC line cord is normally 8' in length, but special lengths up to 50' are available.

The housing is steel, powder coated in red, for optimum flight line safety. Rubber feet and handle are included.

Specifications

  • AC Line Voltage: 115v, 60 Hz.
  • AC Current Drain: 7 amperes maximum
  • DC Output: 14 or 28 volts, up to 25 amperes.
  • Portable, weight only 35 lb. (16 Kg)
  • Maximum Size: 10" x 8" x 8" (25 x 20 x 20 cm)
  • Warranty: one year from date of purchase
  • Regulations: 13.75V ± 1.5v. / 27.5V ± 2.5v.
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Reviews

Works great as advertised.

Greg E Verified Purchase

DB ASSEMBLY R-14/28-25 APU POWER SUPPLY W/ CESSNA 3-PIN PLUG

February 2, 2022

They are back! They are yellow now. This unit arrived with the cessna and piper plugs, 14v and 28v operation. We needed a second unit for power, these supplies are perfect for our operations.

Thom D
December 11, 2020

Q&A

Please note, Aircraft Spruce Canada's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Canada assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Can this unit support piston engine starting?

No this is just a power supply, it cannot start aircraft.

Q: Can this unit charge the aircraft battery?

No, this is meant as an aux power unit only. It is not designed to properly charge the battery.

Q: Can this unit brings the piper and Cessna plugs together?

This only has the 3 pin, cessna style plug.

Q: Does the APU Power Supply w/ Piper Plug PN R-14/28-25P have both standard plug AND piper plug or piper plug only? Can you post a pic of the unit with the piper plug please?

It comes equipped with either the standard three-prong connector or the Piper coaxial connector. Both connectors can be supplied, optionally at a slight extra cost.

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