Baron 58 Cockpit Simulator

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KMA28 Audio panel




Panel Finalized


Design as made with Frontpanel designer



Assembled PCB and components

Connection diagram


Some pictures and the specs of the real KMA28


The KMA boasts an impressive feature set:

bulletSplit-COM: allows the pilot to use the #1 radio to talk with air traffic control while the co-pilot uses the #2 radio to check on weather or arrange for a rental car
bulletDual entertainment inputs let your passengers listen to something other than what you want to hear, and, when installed with a PA speaker, its public address capability gives you their undivided attention
bulletSwap mode: remote frequency management
bulletBackground music with automatic muting when a signal is received on the COM
bulletAbility to interface with an approved airborne telephone
bulletEmergency mode circuitry that allows COM 1 to operate through the pilot's headphone/microphone if the power fails
bulletIntelliVox® automatic squelch control, with separate voice-activated squelch circuits for each microphone input to eliminate intercom squelch adjusting
bulletConvenience of 6 intercom stations
bulletStereo entertainment outputs
bulletSelf-contained marker beacon



TSO Compliance:

Marker Beacon Receiver: TSO C35d

Audio Amplifier: TSO C50c

Environmental Categories: A1D1/CA(MN)XXXXXXBBBBTBKXX

Physical Dimensions:

Length behind panel: 6.8 in (17.30 cm)

Width: 6.25 in (15.88 cm)

Height: 1.3 in (3.30 cm)

Weight: 1.5 lb. (0.54 Kg)

Temperature Range: -15°C to +55°C continuous

Altitude Range: +50,000 ft. (unpressurized)

Intercom: 6-Place

Entertainment: 2 inputs (Stereo)

Transceivers: 4 (COM 1, COM 2, COM 3, approved airborne telephone)

Receiver Inputs: 5 (NAV 1, NAV 2, ADF, DME, AUX)

Transmit Selections: 6 (COM 1, COM 2, COM 3, COM 1/2, COM 2/1, TEL)

Marker Beacon:

Frequency: 75 MHz

Sensitivity: LO 1,000μv Hard

HI 200μv Hard

Selectivity: 6 db at ±10 kHz

40 db at ±120 kHz

Audio Frequency Response: ±3 dB, 300 Hz–6 kHz

Entertainment Frequency Response: ±3 dB, 100 Hz–18 kHz

Speaker Output: 3 W into 4Ω @ 13.8 V, 10 W into 4Ω @ 28.5 V

Headset Output: 38 mW into impedance of 150Ω, <1% THD,

70 mW into impedance of 150Ω, <10% THD

Power Requirements: 11-33 VDC, 2.5A max

Power Consumption: 600mA (typical with speaker on, 28v)

350mA (typical with speaker off, 28v)




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