Wiring Diagram for Cessna 170B

4. 5Vrms into auxiliary input produces 5 watts audio output. KX 175B TRANSCEIVER TSO COMPLIANCE: COMM Transmit COMM Receive VOR LOC Environmental MOUNTING: SIZE: WEIGHT: C37b (DO-110, Class II) C38b (DO-109) C40a (DO-114) C36c (DO-131, Class C) DAPBAAXXXXXX Panel mounted, no shock mounting required. 6.312 x 2.600 × 14. 15 inches w/connectors. (16.03 × 6.60 X 35.94 centimeters) 7.0 lbs excluding external connectors and harness. (3. 18Kg) Page 1-5 SPECIFICATION POWER REQUIREMENTS: COMM Receive COMM Transmit (Tone) NAV Receive Lamps Max. total current CRYSTAL CONTROLLED: FREQUENCY RANGE: FREQUENCY STABILITY: VHF POWER OUTPUT: MODULATION: MICROPHONE: SIDETONE: DUTY CYCLE: SENSITIVITY: SELECTIVITY: SPURIOUS RESPONSES: SQUELCH: AGC CHARACTERISTICS: CRYSTAL CONTROLLED: FREQUENCY RANGE: KING KX 170B/KX 175B NAVIGATION RECEIVER/ COMMUNICATIONS TRANSCEIVER KX 175B TRANSCEIVER CHARACTERISTIC 13. 75V (or 27. 5V with KA 39) 0.70 amps 4.5 amps (2.8 amps unmodulated) 0.52 amps 0. 16 amps (13.75Vdc), 0.08 amps (27.5Vdc) 5. 1 amps (Transmit tone mod, NAV Rec, Lamps) 720 channels 118.000 to 135. 975 MHz with 25kHz spacing ±0.003% TRANSMITTER 5 watts minimum, 50 ohm load 85% modulation capability with 90% limiting, less than 15% distortion at 80% mod. Carbon or dynamic mike containing trans- istorized pre-amp (must provide at least 120mvrms into 500 load). Adjustable up to 4mw into 500 ohm headphones 1 minute on, 4 minutes off (20%) RECEIVER 1. 5µv (soft) will provide a 6 db minimum signal plus noise to noise ratio Typical 6db at 18kHz, 60db at ±20kHz Down at least 60db. Automatic squelch (carrier to noise) with manual disable and carrier squelch override. From 10μv to 20,000μv audio output will not vary more than 3db. NAV RECEIVER 200 channels 108.00 to 117.95 MHz with 50kHz spacing. Page 1-6 ) SPECIFICATION SENSITIVITY: Navigation KING KX 170B/KX 175B NAVIGATION RECEIVER/ COMMUNICATIONS TRANSCEIVER KX 175B TRANSCEIVER CHARACTERISTIC SELECTIVITY : SPURIOUS RESPONSES: IDENT FILTER: AGC CHARACTERISTICS: ACCURACY: NAV OUTPUT: 1. 5µv (soft) will provide a half-flag indication 1. Oµv (soft) will provide a 6 db signal + noise noise Typical 6db at ±19kHz 75db at ±50kHz Down at least 60db Tone rejection, 15db, minimum From 10μv to 20, 000μv audio output will not vary more than 3db Two sigma limit, ±1.0° With LOC adjusted for 0.35 Vrms, VOR = 0. 5Vrms (typical) into 20K or greater load impedance. DME CHANNELING: - Mo M1 M2 M3 108 0 109 110 111 112 113 114 1000 1011100010 0X 1X 2X .3X 4X 5X 6X - 10 115 - 116 0 0 - 117 0 0 7X • .8X 9X Ко K1 K2 K3 .☑O 50kHz 1 . X5 IIOOOO110 1 ✓10000101 4000011011 10001101 NOTE: (-) = OPEN, (0) = DME COMMON. |ILS ENERGIZE: The ILS energize wire is connected to the ILS common wire when the MHz selector is in either the 108, 109, 110, or 111 position AND SIMULTANEOUSLY the kHz selector is in either the 0. 10, 0.15, 0.30, 0.35, 0.50, 0.55, 0.70, 0.75, 0.90 or 0.95 position. ) Page 1-7 SPECIFICATION GLIDESLOPE CHANNELING: KING KX 170B/KX 175B NAVIGATION RECEIVER/ COMMUNICATIONS TRANSCEIVER KX 175B TRANSCEIVER CHARACTERISTIC GS GS GS GS 108 109 110 111 GS GS GS GS GS GS 0.1 0.3 0.5 0.7 0.9 50kHz 108 0 - .0X . XO 109 - 0 .18 1 X5 110 - 0 .2X 111 3X 112 4X 113 5X 114 6X 115 7X 116 8X 117 NOTE: .9X (0) = ILS common, (-) = open, (1) = either KN 73 A+ (KN 73 Installations) or KX 170B, KX 175B A+ with 1KQ source resistance (KI 211C/KI 212/KI 213/ KX 214 installations). AUXILIARY AUDIO INPUTS: INTERCOM INPUTS: FREQUENCY RESPONSES: HEADPHONE OUTPUT: SPEAKER OUTPUT: SIZE: WEIGHT: POWER: AUDIO Two (2) 500 ohms with 30db isolation between any two. One (1) Intercom Microphone Input. (Microphone must provide at least 120mv into 500 load. Within 6db from 350Hz to 2500 Hz. 50mw into 500 ohm 4. 5Vrms into auxiliary input produces 5 watts audio output. KA 39 VOLTAGE CONVERTER Input Volts Output Volts 3. 500 X 2.000 × 5. 500 inches (8.889 × 5. 18 X 13.87 centimeters) 1.1 lbs. excluding harness (.5Kg) A B 27.5vdc 27.5vdc 13.75vdc 13.75vdc (nominal) (nominal) Input Current continuous Input Current 40% duty Output Current continuous 1.5A Output Current 40% duty 5.0A 0.75A Page 1-8 > KING KX 170B/KX 175B NAVIGATION RECEIVER/ COMMUNICATIONS TRANSCEIVER 1.6 UNITS AND ACCESSORIES SUPPLIED A. King KX 170B NAV/COMM (069-1020-00) B. King KX 175B NAV/COMM (069-1019-00) C. King KX 170B/KX 175B Installation Kit (050-1142-00) includes: 030-0101-00 030 1019-00 - 030-2101-04 Connector, Antenna (TED 9-30-4) Clamp, Cable Hall Connector, 42 pin (Amphenol 26-190-42) Plate, Connector Mounting Cover, Connector Mounting Plate Decal, COMM 1 047-1743-01 047-1851-00 057-1214-00 057-1214-01 Decal, COMM 2 057-1214-02 Decal, NAV 1 057-1214-03 088-0136-01 089-2188-22 089-5523-05 089-5903-05 Decal, NAV 2 Filter, Red Lamp E4 ESNA Nut Screw, #4-40 × 5/16 Fil HP Screw, #4-40 × 5/16 PHP 089-5907-05 089-6008-04 089-8025-30 Screw, #6-32 × 5/16 PHP Screw, #4-40 × 1/4 FHP 089-8094-30 090-0019-07 Flat Washer Flat Washer Ring, Retainer 22171222 +224222 1.7 ACCESSORIES REQUIRED, BUT NOT SUPPLIED A. م نے B. Communication and navigation antenna and cables. Headphones and speaker: 1. 2. C. D. Headphones: Low impedance types, 300 to 1,000 ohms. Speaker: Voice coil impedance 3 to 6 ohms nominal. KA 39 Voltage Converter, 27. 5V to 13.75V (required in 27.5V installation only). Microphone: Low impedance carbon, or dynamic with transistor preamp, such as King KA 14. VOR/LOC converter and indicator. Various King Options include: E. 1. KI 201C VOR Indicator (VOR/LOC only) 2. KI 214 ILS Indicator (VOR/LOC Glideslope 40 Channel) 3. (a) (b) KN 77 VOR/LOC Converter, with KNI 520 Navigation Indicator KN 77 VOR/LOC Converter, with KPI 550A Pictorial Navigation System Rev. 1, January, 1976 Page 1-9 4. (a) (b) KING KX 170B/KX 175B NAVIGATION RECEIVER/ COMMUNICATIONS TRANSCEIVER - KN 73 Glideslope Receiver KN 77 VOR/LOC Converter with KNI 520 Navigation Indicator KN 73 Glideslope Receiver - KN 77 VOR/LOC Converter with KPI 550 Pictorial Navigation System KN 74 Area Navigation Computer with KI 213 CDI and Glideslope Receiver. 5. (a) (b) KN 74 Area Navigation Computer with KN73 Glideslope Receiver and KPI 550A Pictorial Navigation System. 1.8 LICENSE REQUIREMENTS The Federal Communications Commission requires that the operator of the transmitter of this A equipment holds a Restricted Radio Telephone Operator Permit, or higher class license. permit may be obtained by a U.S. citizen from the nearest field office of the FCC; no examination is required. This equipment has been type accepted by the FCC and entered on their list of type accepted equipments as King KX 170B/KX 175B and must be identified as King KX 170B or King KX 175B. -CAUTION- The VHF transmitter in this equipment is guaranteed to meet Federal Communications Commission approval only when King crystals are used. Use of other than King crystals is considered an un- authorized modification. Page 1-10 KING KX 170B/KX 175B NAVIGATION RECEIVER/ COMMUNICATIONS TRANSCEIVER SECTION II INSTALLATION 2.1 GENERAL This section contains suggestions and factors to consider before installing the KX 170B/KX 175B NAV/COMM unit and KA 39 Voltage Converter (27.5V installations only). Close adherence to these suggestions will assure a more satisfactory performance from the equipment. 2.2 UNPACKING AND INSPECTING EQUIPMENT Exercise extreme care when unpacking each unit. Make a visual inspection of each unit for evi- dence of damage incurred during shipment. If a claim for damage is to be made, save the shipping container to substantiate the claim. When all equipment is removed, place in the shipping contain- er all packing materials for use in unit storage or reshipment. The KX 170 B/KX 175B installation will conform to standards designated by the customer, installing agency and existing conditions as to unit location and type of installation. 2.3 KX 170B/KX 175B INSTALLATION Listed below are factors and suggestions to consider before installing your KX 170B/KX 175B system. Close adherence to these suggestions will assure more satisfactory performance from your equipment. (a) The KX 170B/KX 175B is mounted rigid in the aircraft panel. Mark and cut the mounting hole as shown in Figure 2-5. The purpose of the "behind aircraft panel mount cutout is to allow a margin of error in cutout size and prevent the mounting tray front edge from being visible. The mounting tray bottom lip should extend through the mounting hole flush with the instrument panel to insure proper plug pin engagement. (b) Avoid mounting close to any high external heat source. supplied for 3 or more radios in a stack. Forced air cooling should be (c) Remember to allow adequate space for installation of cables and connectors. (d) Secure the mounting rack to instrument panel per Figure 2-5. The rear mounting bosses should be attached to the airframe by means of support brackets. (e) Slide the KX 170B/KX 175B into the rack and secure by turning the locking screw on the front panel. (f) -CAUTION- Do not force locking tab screw. An antitheft mechanism is available for the KX 170B/KX 175B (KPN 050-1326-00 short locking bar, 050-1326-01, long locking bar). This kit may be installed at the customer's option to provide a means of locking the radio to the instrument panel with a padlock located on the lower rear corner of the mounting tray. Installation consists of riveting the bracket to the mounting tray as shown in Figure 2-5. After the radio installation is complete, the locking bar may be inserted and a small padlock affixed to deter theft. Rev. 1, January, 1976 Page 2-1 (g) KING KX 170B/KX 175B NAVIGATION RECEIVER/ COMMUNICATIONS TRANSCEIVER The installing agency will supply and fabricate all external cables. The plugs required are supplied by King Radio. 2.4 KA 39 INSTALLATION (a) (For use in 27.5 volt installations only) Select the KA 39 location considering good thermal conductivity to the airframe, con- venient cable rounting, and separation from other heat sources. The KA 39 should be mounted no closer to the KX 170B/KX 175B than is necessary to good thermal isolation. (b) Refer to Figure 2-4 for the KA 39 mounting dimensions. (c) Secure the KA 39 firmly in place. (d) The installing agency will supply and fabricate external cables. 2.5 ANTENNA INSTALLATION (a) (b) Antennas Conventional 50 ohm horizontally polarized NAV and vertically polarized COMM antennas are required with the KX 170B/KX 175B. Vertical bent whip antennas are not recommend - ed. Wideband COMM antennas provide efficient operation over the COMM band. should be installed per manufacturers recommendations. Additional recommendations are as follows: COMM ANTENNA 1. 2. 3. Mount antenna on flat metal surface or install a ground plane at least 18 inches square. The antenna should be well removed from any projections and the engine(s) and propeller. NAV and COMM Antennas must be well separated to minimize COMM interfer- ence to NAV while transmitting, (Minimum recommended separation is 30 db). NAV ANTENNA 1. 2. 3. The location should be well removed from other antenna, projections and engine(s). It should have a clear line of sight area if possible. The antenna MUST BE mounted symmetrically with the centerline of the air- craft. Avoid running other coaxial cables and wires with the NAV antenna cable. The antenna connectors on the KX 170B/KX 175B unit are identified on the rear die casting. Page 2-2 Rev. 1, January, 1976 ) KING KX 170B/KX 175B NAVIGATION RECEIVER/ COMMUNICATIONS TRANSCEIVER -NOTE- With the KX 170B/KX 175B viewed from the rear, the NAV antenna connector is on the right and the COMM antenna connector is on the left. This means that the NAV frequency selector and NAV antenna are on opposite sides of the radio. The COMM frequency selector and COMM antenna connector are also on opposite sides of the radio. (c) (d) -CAUTION- Review the above information carefully. Interchanged antenna connections will cause erroneous NAV operation and in some installations could introduce 7 watts of transmitter power into a NAV receiver causing damage to that unit. Refer to Figure 2-3 for a dual omni antenna installation if two navigation receivers are VOR antenna duplexers normally cause a 6db signal loss. used. Refer to Figure 2-2 for the COMM and NAV antenna cable connector assembly. Solder tack the snap on shield to the connector base at two points to insure that a good electrical ground is made. 2.6 CABLING (a) (b) The length and routing of the external cables must be carefully studied and planned prior to installation. Avoid sharp bends and placing cables too near the aircraft control cables. Fabricate the external cables in accordance with the installation drawing that fulfills the system requirement. > (c) -NOTE- Use good quality stranded wire that will not support a flame and with at least 600 volt insulation. It is recommended that the mike audio line be in a shielded- twisted pair. Since other radio and navigation equipment will possibly utilize the same speaker circuits for muting, speaker selection and microphone switching must be devised by the installing agency. The KX 170B/KX 175B does not shunt the speaker line of other equipment when the off-on-test switch is turned "off". 3 10 9 12 13 14 15 3 3 B 91 17 19 20 21 B B NE ← 1 = = 1 1 22 23 24 25 26 27 28 29 30 31 22 33 34 35 37 36 38 39 40 41 42 CONNECTOR VIEWED PITI KPN 030-2101-04 FROM CABLE END. FIGURE 2-1 KX 170B/KX 175B CONNECTOR PIN LOCATIONS (DWG. NO. 696-6002-00 R-1). Page 2-3 KING KX 170B/KX 175B NAVIGATION RECEIVER/ COMMUNICATIONS TRANSCEIVER .300- Trim coax cable outer insulation as shown. .125 Fold braid back over outer cover of coax. Do not cross strands. Solder center conductor to center pin of conductor. Make sure front end of braid (Point of fold) is even with bottom of connector (Shown by arrows) Slide connector cap, with clearance hole in position to clear dielectric, on to connector until it snaps in place. SOLDER Push braid forward and flatten against connector cap and solder. Solder tac connector cap to connector in at least two places to insure good electrical contact. Page 2-4 FIGURE 2-2 ANTENNA CABLE ASSEMBLY (DWG. NO. 696-6003-00)