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General| Type | VHF Communication Transceiver |
|---|---|
| Channel Spacing | 25 kHz |
| Audio Output | Not specified in available documentation |
| Weight | 2.8 lbs (1.27 kg) |
| Dimensions | 2.5" H x 6.25" W x 8.0" D |
| Modulation | AM |
| Power Supply | 14 V DC |
| Power Output | 10 W |
| Input Voltage | 13.75 VDC |
Manual addendum for the MK12D TSO installation, detailing specific revisions and updates.
Details the MK-12DR as a modified replacement for NARCO MK12, MK12A, MK12B NAV/COMS.
Outlines general, COM, and NAV features of the MK12D TSO unit.
Overview of the MK-12DR as a direct replacement for existing NAV/COM units.
Details mechanical and electrical modifications and adjustment information source.
Lists part numbers for the 14V and 28V versions of the MK-12DR unit.
Addresses TSO considerations for COM transceiver and NAV receiver.
Guidance on modifying dual installations to prevent damage to speaker amplifiers.
Step-by-step instructions for removing existing radios and installing the MK-12DR.
Information on Keep-Alive function and pin connections for Glideslope/DME channeling.
Diagrams showing connector locations, pinouts, and jumper plugs for the MK-12DR.
Explains COM display, controls, frequency entry, and transfer functions.
Explains NAV display, controls, frequency entry, and transfer functions.
Procedures for handling NAV or COM display blackouts and changing frequencies.
Tests for Keep-Alive, transfer, general VOR, LOC, Glideslope, and DME functions.
Tests for COM transmit/receive on various frequencies and two-way communication.
Flight tests for NAV functions like VOR accuracy, LOC/GS intercept, and DME channeling.
Flight tests for COM system compatibility, antenna patterns, and two-way communication.
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