Kenwood TR-7850 Instruction Manual Download | Manualshive

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Summary of Contents for TR-7850

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Page 2: ...IES Please read this instruction manual Shipping container Save the boxes and packing in the event your unit needs to be transported for remote operation or service The following explicit definitions apply in this manual Note If disregarded inconvenience only no risk of equipment damage or personal injury Caution Equipment damage may occur but not personal injury maintenance Carefully unpack your ...

Page 3: ...ED FREQUENCY COVERAGE 143 900 148 995 MHz in switchable 5 kHz or 10 kHz steps allowing simplex and repeater operation on many MARS frequencies Do not adjust coils trimmers or pots These are factory adjustments Do not install near heater outlet BEFORE connection check polarity FRONT PANEL KEYBOARD For frequency selection transmit offset selection memory programming scan control and selection of aut...

Page 4: ... power supply through the back up terminal Less than 2 mA for memory back up from battery Dimensions 175 mm 6 7 8 wide 64 mm 1 1 2 high 220 mm 8 5 8 deep projections excluded Weight 2 2 kg 4 84 Ibs approx Transmitter Section RF output power at 13 8V DC 5052 load HI 40 Watts min LOW 1 to 15 watts approx According to FREQ Modulation Variable reactance direct shift Frequency tolerance Less than 20 x ...

Page 5: ...e transceiver should be as far from the control equipment as possible Antenna installation Various types of antenna for 2 meter mobile operation are available See Fig 1 2C NOTE For gutter mount installation the antenna bracket must be grounded to the car body as shown in Fig 1 2C Affix the antenna securely referring to the antenna instruction For mobile antenna installation seepage 6 nnector l T o...

Page 6: ...r Mobile Operation available Select your desired antenna according to your in stallation space and application Note that the SWR of your antenna should be less than 1 5 A high SWR will cause the TR 7850 protective circuit to operate reducing the transmit output power Insert the transceiver into the mounting bracket D Coaxial cable connections Insert through the bonnet Battery Connect Directly to t...

Page 7: ... you don t intend to use them for a long period of time 1 Power supply connection Regulated power supply SP 120 KPS 12 TR 7850 Yagi antenna stacked Fig 1 3 Installation for Fixed Station Operation Regulated DC Standard voltage 13 8V DC power supply 2 Connection of Current capacity More than 10A another DC source NOTE F____1I II Preferably voltage should be adjustable between 12v and 16V DC The reg...

Page 8: ...wer cable The squelch control is used to eliminate noise during no sig nal time Normally this control is adjusted clockwise until the noise disappears and the BUSY indicator goes off threshold level For scan operation this control must be set to the threshold point RED By pressing the O key on the keyboard 11 the indicator will light indicating that transmit frequency is switched up 600 kHz from t...

Page 9: ...uto scan or memo ry scan depending on the position of the KEY M SEL switch and STEP switches Auto Patch During transmission keys 1 9 and operate DTMF KeysM M M a will operate fourth column in conjunction with the REV switch 12 KEY M SEL Indicator This indicates the position of the KEY M SEL switch The KEY indicator will light when the switch is depressed _ and the M indicator will light in the out...

Page 10: ... for a long period of time more than 1 week or with the power cord disconnected External speaker terminal Connect an 8 ohms speaker using the supplied plug This switch is used to step the operating frequency down during both keyboard and MEMORY Channel operation When pressing the switch a tone will sound When the UP or DWN switch is held on frequency shifts rapidly Pressing both the UP and DWN swi...

Page 11: ...nnel memory including priority memory channel 1 Normal memory CH 1 13 Example To store 146 940 MHz 600 kHz shift in CH 5 1 Set the KEY M SEL switch to the KEY position 2 Set the MEMORY channel selector 16 to the CH 5 position 3 Enter the frequency a b c d Press the Press the Press the Press the Oo DISPLAY Frequency before input key MHz digit b key 100 KHz digit S 9 key 10 kHz digit 6 9 Lf key 1 kH...

Page 12: ...D key Scan starts automatically in 10 kHz or 5 kHz steps depending on the position of the STEP switch 14 3 When a signal is present scanning stops Scan restarts automatically after about 5 seconds 4 To release the scan press the O key or the microphone PTT switch MEMORY SCAN 1 Set the KEY M SEL switch 13 to the M SEL position 2 Depress the sc key The memory channels are scan ned Scan stops and res...

Page 13: ...H O Deviation On the FIX unit X55 1270 10 VR3 adjusts mic deviation clockwise increases deviation On the control unit X53 1180 10 VR1 adjusts tone deviation clockwise reduces tone deviation 20 10 8 6 5 4 3 2 0 5 TR 7850 LOW POWER 144 145 146 147 148 149 CARRIER FREQUENCY IN MHz Fig 3 2 3 12 Miscellaneous Information 1 Frequency step up at power switch ON or OFF In KEY mode operation the frequency ...

Page 14: ...111 XIIX 11 111 1114 IIIX IIIIn 1X111nX111r The following accessories are available for more 5 3 Charger BC 1 sophisticated operation of the TR 7850 5 1 Fixed Station DC Power Supply KPS 12 The KPS 12 DC power supply perfectly matches the TR 7850 s design It incorporates a circuit for protecting the transceiver against shorted output and power supply overload 5 2 External Speaker SP 40 Designed fo...

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Page 16: ...iN IIIII n1N 111 11II I I NIII INIII INIII p1II1 1NII1 PI GL 01 18V505 0 152588 DI 15516 D5 1152206 l J IL81409 01 3 5 PR5532K D2 0 PY5532 De TL 4131 D7 ITLR323 De TLM8051 2 01 3 lJ 135K701L 029 125C224o GR 03 11 31 32 250060181 030 ITA7061AP prs u 12601775161 033 30 25K611GRI 01 16 18 19 25 26 25C1815 Y OJ6 23L2538 22 A 017 21 2541015 7 020 NA1366N 021 27 PPLlVN 023 25Aa961Y 020 25L096 T M 4y M 5...

Page 17: ...LnHX n11NnM11n 1111n IHN MNbM11nN111 IIIIb 1111nMIN IIIIn INIb NNmNIpnXHb 11nM 1n NIF NN BLOCK DIAGRAM p11n XH N11b NIInM11nXMnHllp NXn M1lnMlp 1 NnMNFOlIIb IINn Illln IlllmllX 1111n 1111 1111 IllImIIIU 1114 H 1 Ib X11 1111 IIIU 111 nNpw1111 Illmplln 1111 IIH 11pw1110 1111 11 M11b 111M Nlp N 1111 HII or of I Z I ffi 5 to to ...

Page 18: ...reet Compton California 90220 U S A TRIO KENWOOD CORPORATION 17 5 2 chome Shibuya Shibuya ku Tokyo 150 Japan TRIO KENW000 COMMUNICATIONS GmbH D 6374 Steinbach TS Industriestrasse 8A West Germany TRIO KENW000 AUSTRALIA PTY LTD 30 Whiting Street Artarmon Sydney N S W Australia 2064 15102 PRINTED IN JAPAN B50 3901 00 K ...

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Page 20: ...onics Manuals Consumer Electronics Service Ops Manuals Available Pager Manuals Pager Service Programming Manuals Available Tektronix 7000 Series 60 Volume Plug In Manuals Set Amateur Radio Manuals Ham Radio Manuals by FTP Amateur Radio Manuals Ham Radio Manuals on CD Amateur Radio Manuals Large Collections on CD and DVD Thousands of Scanned Manuals Big Buck Distributing canned Manual on eBay Some ...

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