Baron 58 Cockpit Simulator

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KR87 ADF


PCB, buttons and double rotary assembled, leds, red window (+ window text) still to be assembled

Design

Front Panel design

 

PCB design (not final version)

 

Dual rotary encoder 

Dual rotary encoder from two simple circuit twelve positions rotary switches

see tutorial on opencockpits website: link to tutorial

 

Real ADF KR87

The KR 87 offers superb dependability in a compact, attractive TSO'd unit. It provides accurate bearing-to-station in the 200 kHz to 1799 kHz frequency range, complete with ADF, ANT and BFO tuning modes, plus audio output for station identification and monitoring AM broadcasts.

The KR 87's advanced "coherent detection" design rejects unwanted frequency noise and achieves much greater range while remaining less susceptible to engine noise, static and atmospheric interference. Its "flip-flop" frequency display allows you to switch between pre-selected standby and active frequencies with the touch of a button. 

Both frequencies are stored in a non-volatile memory circuit, meaning you don't have to worry about battery power.

Real Bendix/King KR87

Real set

Functions (Info from  'Friendly panels')

(source http://www.friendlypanels.arrakis.es/ )

1. ADF / ANT modes. This version displays ADF station ident.

2. BFO mode (just the letters)

3. In frequency mode transfer stand by frequency to active. Returns to frequency mode from timers modes.

4. Go into timers mode.

5 and 6. Controls timers modes (described below).

7. On Off

8, 13, 14. Decrements frequency

9. Increments fractal frequency

10, 11, 12. Increments frequency

Display modes

Frequency mode

Use knob and swap button to manage this screen.

FLT timer Mode

From frequency mode push FLT/SET button once to go into this mode. This timer begins to count when you turn on the gauge and stops when you turn it off.

ET timer Mode

rom frequency mode push FLT/SET button twice to go into this mode. This timer starts to count when you turn on the gauge, but you can control it. Clicking on SET/RST button once stops the timer. When it is stopped clicking again reset the timer and starts to count from zero. Clicking to the right of the button (area 7 above) will reset it to zero and ET begin to blink, you can use the knob to set a countdown (up to 59 minutes and 59 seconds), push SET/RST to start the countdown. After the countdown timer reaches zero, the counter will come up, whatever the mode you are in, and will begin to count upwards indefinitely while flashing for a few seconds, returning then to the mode you were before, if it was different. The Audio Alert is then sounded

Specifications

FEATURES
bulletDigitally 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
bulletUsed with KA-44B combined loop/sense low profile ADF antenna OR KA-44 blade antenna
bulletCan be used with single needle KI-227 ADF indicator or dual needle KI-228 indicator (both indiactors available with manual or slaved compass cards)
bulletMay be interfaced to King KI-229 or KNI-582 RMIs
bulletCan be interfaced with other 3-wire RMI indicators by way of KDA-692 RMI adapter
bulletModels available with single or dual indicator driving capability (see table below)
bulletModels available with ADF Superflag output for use with EFIS systems (see table below)
bulletInternal timer for flight time and elapsed time which proves valuable for non-precision timed approaches, fuel management, dead reckoning navigation
bulletAutomatic dimming circuit adjusts the brightness of the display to compensate for changes in the ambient light level
bulletCoherent detection design rejects unwanted frequency interference, achieves significantly greater range and has less suspectiblility to engine noise, static and atmospheric interference
bulletFlip-flop frequency display allows to switch between pre-selected "standby" and "active" frequencies
bulletOperates on any voltage from 11-33 VDC with 12 watts power consumption
bulletModels available for 28 volt use only (see table below)
bulletModels available with 5 volt display lamps (see table below)
bulletModels available with standard or shiny display lens (see table below)
bulletModels available with clear or blue display light (see table below)
bulletModels available with backlit nomenclature (see table below)
bulletForced air cooling not required
bulletTSO'd
SPECIFICATIONS
Size: 6.32"W x 1.35"H x 10.73"L Weight: 2.9 lbs.
TSO Compliance: TSO C41c Class A, DO-160 Env. Cat A1D1/A/SKP/XXXXXX/ZBABA Applicable Documents: RTCA DO-142
Frequency Range: 200KHz to 1799KHz in 1 KHz increments Receiver Selectivity: 6dB bandwidth: +-2 KHz max off center frequency; 80dB bandwidth: +-7 KHz max off center frequency
Bearing Accuracy: +- 3 degrees from 70 uV/m to 0.5 V/m RF input signal level Power Requirements: 11 to 33 VDC, 12W typical
Temperature Range: -20 to +55C Altitude Range: Up to 50,000 feet
Receiver Senstivity: 150uV/m max for s+n/n = 6dB Spurious Response: 80dB down +-12KHz from center frequency
Indicator Drive: DC sine and cosine voltages 4.5 +- 3.0VDC at 150mA max Audio Output: 50mW across 500ohm

 

 

 

 

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