- 3 piece ADF system consisting of KR-87 ADF receiver, KI-227 single ADF
indicator or KI-228 dual needle indicator, KA-44 or KA-44B combined
loop/sense antenna
- Digitally tuned solid state automatic direction finder which provides
bearing information to stations in the frequency range
of 200 KHz to 1799 KHz and which also provides audio reception to enable
pilot to identify stations
- Uses KA-44B combined loop/sense low profile ADF antenna OR KA-44 blade antenna
- KI-227 or KI-228 indicator available with manual or slaved compass cards (see individual units)
- May be interfaced to King KI-229 RMI or KNI-582 Nav indicator
- Can be interfaced with other 3-wire RMI indicators by way of KDA-692
RMI adapter
- KR-87 models available with single or dual indicator driving capability (see KR-87 receiver)
- KR-87 models available with ADF Superflag output for use with EFIS systems (see KR-87 receiver)
- KR-87 receiver with internal timer for flight time and elapsed time which proves valuable
for non-precision timed approaches, fuel management, dead reckoning navigation
- KR-87 receiver with automatic dimming circuit adjusts the brightness of the display to compensate
for changes in the ambient light level
- Coherent detection design rejects unwanted frequency interference, achieves
significantly greater range and has less suspectiblility to engine noise, static and
atmospheric interference
- KR-87 receiver with flip-flop frequency display allows to switch between pre-selected "standby"
and "active" frequencies
- Operates on any voltage from 11-33 VDC with 12 watts power consumption
- KR-87 receiver models available for 28 volt use only (see KR-87 receiver)
- KR-87 receiver models available with 5 volt display lamps (see KR-87 receiver)
- KI-227/228 indicator has optically coated, non-reflecting glass lens
- KA-44B antenna contains preamplifier and modulator circuits which combine antenna signals
into a single signal input to the receiver
- Forced air cooling not required
- TSO'd
- NOTE: above system image shown with KR-87, KI-227, KA-44B
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