Realistic PRO-53 User's Manual
Contents
1. 20 HVa0 020 25D526 0 POWER Sw a Bar em R93 9 5 153 SW 18 7 UN 10011 S Y E e a A CA ae ae A a D6 AC 120V 60Hz S EE D10 17 TLR 104 Gd Ri Ee CEET a ar ATA i e A C98 04 RIG 390 Aow ON li E E E E C100 1000 25 MAIN P C BOARD SW P C B GE 228 6392 GE 220 6396 REMARKS 1 RESISTANCE VALUES IN OHMS K 10001 M 1000000 2 CAPACITANCE VALUES IN uF P uuF 3 T TANTALUM CAPACITOR 4 M MYLAR CAPACITOR 5 6 3 ALL VALUES AND RATINGS ARE SUBJECT TO CHANGE FOR IMPROVEMENT WITHOUT NOTICE CD THIS SYMBOL INDICATES DC VOLTAGE MEASURED WITH DC VOLT METER 100KS2 V UNDER FOLLOWING CONDITIONS HIGH BAND CH t MANUAL OPERATED VOLUME MINIMUM i SW P C BOARD AND SQUELCH MAX C W L eeh 7 lt gt THIS SYMBOL INDICATES LOW BAND VOLTAGE MEASUREMENTS CI THIS SYMBOL INDICATES UHF BAND VOLTAGE MEASUREMENTS D e O O O O O O O O O O O O O O O2. For superior reception connect an outdoor antenna to this jack Crystal Program Switch Remove the cabinet and install or replace crystals Line Cord Plug into a source of 120 volts 60 Hz AC power LED Channel indication Channel PROGRAM Switch o oo oo nn PROGRAM enee SQUELCH SCAN NES D gi A P K eee gt E yy vs A al KL 3 i MAREAL ATROLMAN SCANNING RECEIVER uge EEN ee enero SQUELCH Control Lamaen w Headphone Jack OFF VOLUME Control Selector Switch Hole for Telescopic Antenna wh BARON H BARA OF TAROT CORVERATI CORY PROB TEAS reset N set HE il Line Cord X ANTENNA Jack INSTALLATION A good installation will make the most of the PRO 53 s capabilities Don t loose any of the tiny signals by using an inadequate antenna or poor quality lead in The telescopic antenna supplied will probably give you very good results However to obtain the best possible recep tion use an outdoor antenna and use a high quality foam coaxial antenna cable Your local Radio Shack store has a fine selection of antennas cable and accessories Stop by and talk with your sales person who will be able to advise you on the best antennas and accessories they also know the most popular frequencies in use in your area OPERATION After power and antenna are connected and a crystal or crystals has been installed your PRO 53 is ready to use Turn VOLUME on
3. What to listen for and where That is a little difficult for a specific answer Each area of the country can and will use different channels All we can do is give you some general pointers and then let you take it from there Find out if there is a local club which monitors these frequencies Often a local electronics repair shop that does work on the equipment can give you the channel frequencies used by local radio services A volunteer police or fire employee can also be a good source of this information An interesting service is the Mobile Telephone FCC has assigned this service channels in the range of 152 51 to 152 81 MHz at every 0 030 MHz channels are 30 kHz apart Also 454 375 to 454 95 MHz with channels 25 kHz apart from 454 375 to 454 625 and then every 50 kHz up to 454 95 As a general rule on VHF most activity will be concentrated between 153 785 and 155 98 and then again from 158 73 to 159 46 MHz Here you ll find local government police fire and most such emergency services If you are near a railroad yard or major railroad tracks look around 160 0 to 161 9 for them In some of the larger cities there has been a move to the UHF bands for these emergency services Here most of the activity is in a spread of 453 05 453 95 and again at 456 025 459 95 MHz In the UHF band the overall spread of 456 025 459 95 and again at 465 025 469 975 MHz is used by mobile units and control stations associated with base a
4. by rotating to the right Rotate SQUELCH fully counterclockwise Set all the Channel PROGRAM Switches on button next to LED You should hear a rushing sound from the speaker Now adjust SOQUELCH clockwise until you no longer hear the rushing background noise Rotate SQUELCH clockwise until the background noise just stops You can t adjust SQUELCH properly while listening to a station so wait till signals cease If you set SQUELCH as noted above the PRO 53 will appear dead until a signal comes in when a signal comes in the Squelch circuit opens up and you hear the signal When the signal ceases the Squelch circuit closes and cuts out all sound until the next signal comes in If you want to PRO 53 to continuously scan the channels for which you have crystals installed you must adjust SQUELCH as previously instructed then set the Selector Switch to the SCAN position The PRO 53 will constantly scan each channel in sequence when a signal appears on one of the channels the receiver will lock onto that channel and you will hear the signal If you do not want automatic scanning on one or more channels set their Channel PROGRAM Switches to the off position down or away from the LED indicator If you want to stay tuned to one channel only set the Selector Switch to the center position stop scanning and then press to the MANUAL position to advance to the channel you want to listen to as indicated by the
5. LED above that channel switch For Manual scanning the receiver can be either squelched adjusted as previously indicated or unsquelched SQUELCH control set to extreme left For Automatic scanning SQUELCH must be set to eliminate the back ground noise SKIPPER CIRCUIT Your scanner has a built in skipper circuit which is fully automatic and cannot be disabled It works in both the SCAN and MANUAL modes of operation This feature causes the unit to skip over a locked out channel s so that there is no possibility of the Receiver stopping ona locked out channel s SCAN DELAY The PRO 53 has a built in 2second delay feature which virtually eliminates missed replies This circuit holds the Receiver on the channel you are monitoring for a period of 2 seconds after the carrier has gone off the air before it resumes normal scanning function ACCESSORIES A pair of headphones can be a very useful accessory In areas where a high noise level is present in a factory at the scene of a fire or accident etc or when you want to listen privately use headphones Your Radio Shack store has a couple of very fine selections for your PRO 53 Just plug them into the front panel Headphone jack 10 FREQUENCY COVERAGE For maximum sensitivity the channel frequencies you choose should be within 3 MHz of 40 MHz on the VHF Lo band that is in the spread of 37 to 43 MHz and 4 MHz of 153 MHz on the VHF Hi band from 149 to 157
6. for 20 dB quieting 9 kHz 6 dB 17 kHz 50 dB 65 dB 25 kHz Greater than 50 dB 40 dB at 40 MHz 35 dB at 153 MHz 10 dB at 480 MHz 10 channels second 2 to 3 seconds 7 kHz 10 7 MHz and 455 kHz Crystal filter for 10 7 MHz Ceramic filter for 455 kHz Variable from less than 1 microvolt 2 watts maximum Standard HC 25 U 3rd overtone 8 ohms 2 1 2 65 mm dynamic type AC 120 volts 60 Hz 11 watts PREPARING FOR USE To use your PRO 53 you must do three things Connect power Install from 1 to 8 crystals Connect an antenna a telescopic Antenna is provided with your Scanner screw it into the hole in the top of the Case To make a quick check you must connect the Line Cord to a source of 120 volts 60 Hz AC power With an antenna connected use the telescopic Antenna provided and a crystal installed turn the Receiver on by rotating VOLUME clockwise Rotate SQUELCH maximum counterclockwise You should hear a rushing sound in the speaker Crystals are not included with your PRO 53 because the frequencies are so numerous The frequencies used in your part of the country will be different from those used in other areas Order the crystals you want from your Radio Shack store specify the model number of this unit and the frequency you want to receive Remove the 4 screws around the edge of the Case on the rear of the Scanner push the chassis out the front Inside the Scanner you ll see the crystal
7. MHz For the UHF band stay within 15 MHz of 480 MHz from 465 to 495 MHz The PRO 53 will function very adequately down to 30 and up to 50 MHz from 144 to 174 and from 450 to 512 MHz but with reduced sensitivity The superior reception spread of 6 8 or 30 MHz 3 4 or 15 MHz can be moved up or down in this band of frequencies by special realignment of the front end circuitry of the PRO 53 which should be attempted only by qualified Electronics Service Technicians who have adequately calibrated precision test equipment TYPES OF SIGNALS YOU LL BE ABLE TO MONITOR Your community is alive with action action which is constantly being reported on the air waves And your PRO 53 will automatically scan the air waves to bring you that action your police force at work a fire truck on a mission Sheriff s department State police the National Weather Service Ham Radio operators highway and other emergency type services some industrial services some transportation services taxi trucks railroad plus some Government services Lots of things are going on that most of us just are never aware of But with the right frequency crystal in your PRO 53 you can monitor such exciting signals You ll have to do a little investigating in your community to find out what services are active and on what fre quencies You will find one of our books to be very interesting and helpful in this area REALISTIC GUIDE TO POLICE FIRE AND AIRCRAFT RADIO
8. Ozta 52 5 crisis Dard aoeegekugs Y in qe La BEE 5 3 32 35 e225 8 2 E 3 5252833802 E 5 e EIERE 5 3 t wegen tbe gt f a 2 Pi Ei cen E pi D Eu Uz 3210372 BS 7 amp reposa cos E a ol ai 5 3 32 _ m o E zt Zi 323 20 300 E MO gt EA Bonnar z she oa fie ojal Valela Sj NP al o oP Bl eene ene MEAN i 3 3 Ma o e Fda i ot 1 GE EE oc 1 ee r 1 001 en 3 1 g a PE ed D 5 EI AMO 110 o i 2 1 Is Fa x a i O A 009 su i EP el A 4 z EI 3 gs o 2001 9 3 Eh NR H gk 1 25 A Wa j Ze TA pi mt 3 ei o f EA az wO E k E ew rf ffe s 2 H d 8 a 5 Ch j BS Y E E z A 2 D D 2 el z j cic His ci aaa cnet PE Ln GL OO i i 5 y S S g 2 l t ont dE Lt EIER E 3 109 99 a al 3 A DT e 8 a a d Greet S D l yan Dr cee rn Wa g 6 E A H A 100 ei E 6 ES 3 BR gt Fw Le r D EN i E E 1 H D EI f 3 i PY t ae 5 d D I 3 DEI Jee EG j E El z 3 z 3 a A gt z E 3 b 7 ES z amp 3 4 m H ke E z RADIO SHACK Ma DIVISION OF TANDY CORPORATION U S A FORT WORTH TEXAS 76102 CANADA BARRIE ONTARIO L4M 4W5 TANDY CORPORATION AUSTRALIA BELGIUM U K 280 316 VICTORIA ROAD PARC INDUSTRIEL DE NANINNE BILSTON ROAD RYDALMERE N S W 2116 5140 NANINNE WEDNESBURY WEST MIDLANS WS10 7JN CUSTOM MANUFACTURED FOR RADIO SHACK A DIVISION OF TANDY CORPORATION o 8A83300 Printed in Japan
9. SCHEMATIC DIAGRAM AA rK K mm 4 Less I S I o o PA o o AS 3 NOU LUA z i m ue 909 PY g vi 8 1 El et Gi 7 D x gt i D Ru WOA ES a gt ol f y R j ES x E Ei S Fo o L t LPL EI 3 ASL venu Can e eg H m D gl E S a 3 H 5 a Im weg a m i oS H 3 S CH m1 Log SCH e A A 3 a P 8 Z SR ch E e 3 H GR a e o 215 y 3 ra E A ER 3 3 Peerna E E Oh Yi E S Ze con BUSCH 3 5 D 4 Pei amp R 3 8 a re ry 2 kd ajiz R 8 CE Y 2 2 ES 33 3 2 A MEL Din te oe 5 98 001 ke a 5 zA z S wir 00 wz 694 23 2 AMY ER S o EES z 1 Ind 220 12 gt Zoe EL Je Sey 5 H 7 E e Ex D 23 ol ECK fi z 4 D ES Se e seg eat AM A CO d zz a SZ of Ze Ek wee D _ S ra E 2 52 sl Zog aw 8 pe 3 Ex als voc FE Di A B 9 58 S D 13 2001 06 Boe oo i HE i B ES S33 22 1S eye ese 3 oie w i SS gt 221 SR di rd pem ae D oy a e E 22 a z 032 S g 3 Pe 33 EN 22 oa 3 8 cfr ZS 4 E sro 24 P g Sa EET e 2 ES xt Tue 95 a a z oe eo Gm 3 E Se 2 25 3 ER 130 435 Ss 3 i
10. Your PATROLMAN PRO 53 scanning receiver is a completely solid state VHF UHF superheterodyne receiver using dual conversion It is capable of automatically scanning eight crystal controlled channels Some special features are crystal filter ceramic filter channel lockout circuit skipper circuit scan delay circuit and AC operation It is designed for use in the narrow band FM channels of public service communications VHF and UHF band police fire civil defense radio telephone forestry and weather service plus many other industrial radio services and the 2 meter HAM radio band These and many other services share this band of frequencies from 30 to 50 MHz 144 to 174 MHz and 450 to 512 MHz The PRO 53 features both high sensitivity and selectivity and a sophisticated circuit which includes a 10 7 MHz Crystal Filter and a 455 kHz Ceramic Filter to reduce or eliminate adjacent channel or strong signal interference Such interference is often experienced when operating in urban and metropolitan areas or where very strong and closely placed signals are present An important engineering achievement designed for practical applica tions the PRO 53 is remarkably easy to use yet its up to date complex circuit consists of 20 separate transistors three of which are Field Effect Transistors four integrated circuits which incorporate the equivalent of hundreds of components 13 diodes 8 LEDs and 1 zener diode This Monitor Receiver i
11. ever you should treat it with care don t subject it to excessively rough handling You will find it will give you long life if kept free from dirt and excessive humidity 11 D1 HV80 1C 1 MC3357P Q 25C18151GR TELESCOPIC ANTENNA aes ink x al Or gt Q1 2 2SC535 B Q3 2SK19 Y 04 25C1815 0 e SE e T Le C24 3P pS 8 100 Ela C2 Sp RG 1 lt U ANTENNA 2 a T2 C pg Am 524 E E ge y 104 33P R1 56K A4 220 10 7MHz Cp c33 A13 1K 04 iM 022 M CJ BF gt d dal AD GQ NY GD GS A14 1K VR 2 SOK 8 C5 001 R2 330 C6 001 R27 10K 38 10P 18 a De cso t a RK 7 001 R31 56K i 3 y i i 1 a ei g i L DI Ki wl sl O ETA 06 Ou Ong SW 2 g 3 O O CH 2 bd t O Bis S O WA O O CH A t Y O Q9 2501117 S Q10 28C1117 A v gt swa S HEADPHONE ia 3 64 co 2P O OH cha JACK C48 10P 6 2 711 O 20 l Q Tacs 001 3 ql os zg O e Q16 25C394 Y 2 ne 1 a le hy e e c67 6P E On Sw els L S iq SPEAKER 802 a AS 3 55 e ef N Bese 3 O a g x x o oO t z 3 On 57 z g 3 mus z z i E O aoe 019 25C1173 0 8 O O CHES ag O ei 14 8 15 5 RA9511 1W j a r BAND SELECTOR SW d BE al Je 13 la E S S 2 8 gt w C95 04 ye e e 8 8 8 In 8 RI 150 me CRYSTAL SOCKET 48 i Lay i i eee eee a D Sw 9 O 3 MATA REO 1C 4 T3375 Q17 18 25C1815 GR 018
12. nd repeater units which operate 5 MHz lower that is 451 025 454 95 and 460 025 464 975 MHz This means that if you find an active channel inside one of these spreads you can look 5 MHz lower or higher as the case may be to find the major base station repeater for that radio service Your local Radio Shack store also has another very useful book POLICE CALL Radio Directory t give a very detailed listing of radio services and frequencies used in your region With this book you ll be able to locate many frequencies used in your own community NATIONAL WEATHER SERVICE RECEPTION Continuous weather broadcasts are transmitted 24 hour a day in many parts of the country If you are using a crystal set to one of the three channels assigned 162 475 162 55 or 162 40 MHz your PRO 53 will automatically lock in on that channel since the broadcasts are continuous To prevent automatic locking set the channel PROGRAM Switch for that channel to the oft position button down When you want a weather report set the PROGRAM Switch to the on position button up for that channel In areas where two or more stations are close to each other one will use 162 55 and the other will use 162 40 MHz a 3rd might use the newer frequency 162 475 MHz Check with your local FCC office or the Weather Bureau for the frequency used in your area MAINTENANCE The PRO 53 is a ruggedly built electronic unit with all parts con servatively rated How
13. ransmissions When properly set Squelch will keep the PRO 53 silent until a signal comes in on the channel s you are listening to then the Squelch circuit will open and you hear the signal Selector Switch is for determining the function of the scanning feature In the SCAN position each channel will be scanned auto matically In the center stop position the PRO 53 will not scan but will remain tuned to the channel indicated by the LED To advance the receiver to the next channel in sequence press to the MANUAL position momentarily each time you do so the Receiver will advance one channel Channel PROGRAM Switches in the up position button next to the LED that channel is active When you press the switch down that channel is automatically locked out and will not function LED Channel Indicators these Light Emitting Diodes show which channel s is active During scanning these lights light up in sequence when the receiver is operative on one of the channels the light for that channel will go on When the Channel PROGRAM switch for that channel is in the down lock out position that LED will not light Headphone Jack is for private listening Plug a pair of 8 ohm Head phones into this jack and the built in speaker will be disconnected Especially helpful for listening in high noise areas Telescopic Antenna Insert the antenna through the hole in the cabinet top and screw in place ANTENNA Jack
14. s designed to operate from 120 volts AC RADIO SHACK LIMITED WARRANTY Al This equipment is warranteed against defects for 1 year from date SY of purchase Within this period we will repair it without charge for parts and labor Simply bring your sales slip as proof of purchase date to any Radio Shack store Warranty does not cover transporta tion costs Nor does it cover equipment subjected to misuse of accidental damage This Warranty gives you specific legal rights and you may also have other rights which vary from state to state We Service What We Sell WARNING TO PREVENT FIRE OR SHOCK HAZARD DO NOT EXPOSE THIS RECEIVER TO RAIN OR MOISTURE SPECIFICATIONS SEMICONDUCTOR COMPLEMENT FREQUENCY RANGE CHANNELS OF OPERATION FREQUENCY COVERAGE VHF UHF SENSITIVITY SELECTIVITY ADJACENT CHANNEL REJECTION SPURIOUS REJECTION VHF IMAGE REJECTION VHF Low VHF Hi UHF SCANNING SPEED DELAY TIME MODULATION ACCEPTANCE I F FREQUENCY FILTER SQUELCH SENSITIVITY AUDIO POWER CRYSTAL REQUIREMENTS BUILT IN SPEAKER POWER REQUIREMENTS 20 transistors 4 integrated circuits and 22 diodes 30 50 MHz 144 174 MHz and 450 512 MHz Eight as determined by any one of 8 crystals operating in the frequency range 6 or 8 MHz for maximum sensitivity 40 MHz 3 MHz 153 MHz 4 MHz 30 MHz for maximum sensitivity 480 MHz 15 MHz Better than 1 uV
15. sockets and program switches Provision is made to install 8 crystals the program switch position can be used to obtain either VHF Low VHF Hi or UHF CAUTION When you open the Scanner Do Not Touch Any Parts other than the Crystal Sockets and Switches All the parts have been precision aligned at the factory and must not be tampered with For UHF crystals position the program switch to U marked U on printed circuit board For VHF Hi set the program switch to H marked H on printed circuit board For VHF Low set the program switch to L marked LU on printed circuit board In the example shown channel 3 will have a UHF crystal and channel 8 will have a VHF Hi crystal Ask the manager of your Radio Shack store what the most popular and active channels are in your area He will be glad to advise you 23 45 67 8 2 1 o o o o o o H U UHE o o O o o 6 H VHE HI L 1 3 45 6 7 8 CHANNEL VHF LOW Since crystal frequencies must be extremely accurate and crystals should be matched for specific units we recommend you obtain crystals for your Receiver only from Radio Shack We can not be responsible for the poor or improper operation of crystals from another manufacturer s CONTROL LOCATION AND FUNCTION OFF VOLUME is the power switch and Volume control When not in use rotate this control to the left to turn it off SQUELCH Control is to eliminate annoying background noise between signal t
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