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Audio Selector Panel PMA6000B of PS Engineering was chosen for replication in this cockpit. See full info about this unit at the official PSI site: ps-engineering.com/ PMA6000B.
Assembled audio panel has two data cables. One of them has the 8-bit port for connecting to the bus board, and used for buttons input. The other cable is connected to the LED registers board for controlling the leds in the buttons and OMI lights.
Working buttons and LEDs are: Com1(receiver), Com2(receiver), Nav1, Nav2, MKR, ADF, DME, SPK (for real switching between headset and speaker), OMI lights. Transmitter Com1 is always ON
Original KX 155A
Two KX 155A transceivers are made from 1-4mm PVC and red plexi. NAV Indicators used with the KX 155A are the KI 525A Horizontal Situation Indicator, the KI 209A and DME.
Ready and go!
KR 87 is operating in pair with KI-227 indicator (or KI-228). ADF is made of PVC of 1 to 4 mm thick, and 3-mm red plexi has been used for the indicator window
Original Bendix/King KT 70
Emergency switch is made from 2-3mm PVC and top parts of the red switch (See original ELT-200).