Bendix/King
KMA28
Audio Amplifier/Intercom/Marker Beacon Receiver
006-10565-0000
Page 1-3
Rev. 0, Sept. 2000
1.5
SPECIFICATIONS
TSO COMPLIANCE
Marker Beacon
:
C35d, Class A
Audio Selector/Intercom
:
C50c, Class A
APPLICABLE DOCUMENTS:
RTCA/DO-214
RTCA/DO-143
RTCA/DO-160C
RTCA/DO-178B
ENVIRONMENTAL Qualifications:
A1D1/CA(MN)XXXXXXBBBBTBKXX
Temperature Range:
Operating:
Storage:
-15º C to +55ºC
-55º C to +85ºC
Altitude
:
Up to 50,000 feet in an non-pressurized area of
the cockpit.
DIMENSIONS:
Height: 1.3 in. (3.3 cm) Width: 6.25 in. (16.9 cm)
Depth: 6.8 in. (17.3 cm)
WEIGHT (With Rack & Connectors):
1.5 lb. (0.54 kg)
POWER REQUIREMENTS (Including Internal Lighting):
Voltage
:
11 to 33 VDC
Maximum Current
:
2.5 Amp (Externally protected by a 3 Amp circuit
breaker.)
Typical operating current
:
Speaker off:
Speaker on, 28V, full radio volume
350 mA
1.5 A
Audio Selector Specifications
Audio selector panel input impedance
:
510
Ω
Input Isolation
:
-60 dB (min.)
Speaker Muting
:
-60 dB (min.)
Speaker Output
(into 4
Ω
) with no clipping
14 VDC:
28 VDC:
3 Watts (min.)
10 Watts (min.)
Receiver Inputs
:
9
(Com 1, Com 2, Com 3, Nav 1, Nav 2, ADF,
DME, MKR, AUX)
Unswitched Inputs
:
2
(examples: GPS WPT, Value, Autopilot Discon-
nect, Altimeter DH)
Transmitter Selections
:
6
(Com 1, Com 2, Com 3
Com1/2, Com2/1, Telephone)
Speaker Impedance
:
4
Ω
Headphone Impedance
:
150 - 1000
Ω
Headphone Output
:
38 mW each headset, no clipping <1% THD
70 mW each headset with < 10% THD into 150
Ω
Microphone Impedance
:
150 - 600
Ω
