User Manual in PDF - All Spectrum Electronics
Contents
1. than thicker hardware store solder Pre tin any stranded hookup wires leading in and out of your PC board kit project It will prevent problems later CPOS e 11 ASSEMBLY INSTRUCTIONS In ALL PC board assembly steps our word INSTALL means to do this Insert the part oriented or pointed correctly into its holes in the PC board If helpful gently BEND the part s wire leads or tabs to hold it in place with the body of the part snugly against the top side component side of the circuit board The component side is silkscreened with the part numbers for easy parts location identification Solder ALL wires or pins of the part Trim or nip all excess wire lengths extending beyond each solder connection taking care that wire trimmings do not become lodged in solder connections Follow the assembly instructions IN SEQUENCE and check off each step as understood and completed Examine the schematic circuit diagram and PC Board parts layout diagram as you proceed Use good soldering techniques Let your soldering iron tip heat both the component lead wire and PC board trace enough so that the wire itself AND the foil trace BOTH become hot enough TOGETHER to melt a bit of solder so that it flows smoothly from the pin to the PC board trace Enough said Let s get building As you build your code practice oscillator kit save a couple of clipped off leads from capacitors and resistors These will be needed later If2. CODE PRACTICE OSCILLATOR KIT Ramsey Electronics Model No CPO3 Ever wanted to hone your code skill but didn t have an easy way to practice This handy little kit will allow you to tap away anywhere you happen to be Small enough to fit into your pocket or briefcase you can take it anywhere You ll find yourself up to speed in no time Great starter kit e ideal for Boy Scouts e Perfect first electronic kit for schools e Increase your code speed practice anywhere e Easy one evening assembly PARTIAL LIST OF AVAILABLE KITS RAMSEY TRANSMITTER KITS e FM10A FM Stereo Transmitter FM25B Synthesized FM Stereo Transmitter AM25 Synthesized AM Transmitter AM1 AM Transmitter RAMSEY RECEIVER KITS FR1 FM Broadcast Receiver Aircraft Band Receiver Active Antenna SC1 Shortwave Converter RAMSEY HOBBY KITS 567 Personal Speed Radar S870 Speech Scrambler TT1 Telephone Recorder SP1 Speakerphone e Microwave Motion Detector PH10 Peak hold Meter LC1 Inductance Capacitance Meter RAMSEY AMATEUR RADIO KITS DDF1 Doppler Direction Finder Kit HR Series HF Mode Receivers QRP Series HF CW Transmitters CW7 Keyer Power Amplifiers RAMSEY MINI KITS Many other kits are available for hobby school scouts and just plain FUN New kits are always under development Write or call for our free Ramsey catalog C
3. ELECTRONIGS 13 YERO CODERRACTICE OSQI DATOR 9885 07 e 691 0 T 3 s e 5 PARTS LIST RESISTORS o o o o 270 ohm resistor red violet brown R2 1K ohm resistor brown black red R1 10K ohm resistor brown black orange R3 5K ohm trim pot marked 502 R4 CAPACITORS 1 1 pF ceramic disc capacitor marked 1 104 or 100 nF C1 1 01 pF ceramic disc capacitor marked 01 103 10nF C2 SEMICONDUCTORS O 1 555 timer oscillator chip U1 HARDWARE AND MISCELLANEOUS mini speaker SP1 9 volt battery snap brass strip 4 flat washer 4 40 x 1 4 machine screws 4 40 kepnuts rubber feet 00000909 BP 6 SORTING PARTS AND GETTING READY Prepare a clear uncluttered workspace In addition to room needed for tools and handling the circuit board allow space for some kind of parts organizer that will not be bumped or dropped This organizer can be a small tray or box An egg crate works great Refer to the Parts List published in the kit manual Organize the kit parts according to basic types Check carefully to make sure a small part did not slip away when opening the kit s packaging Please make sure that you have sufficient lighting for clear parts identification and accurate circuit soldering This might seem like gratuitous advice that you did not ask for but experience h
4. ING e Attach a 9 volt battery to the battery snap e Try your CPO3 by pressing down on the brass strip You should hear the audio tone from the speaker e Vary the audio tone by turning the adjustment in the trimpot until you get your desired pleasing tone e Look up the Morse Code table in centerfold of this manual and get practicing CONCLUSION We sincerely hope that you will enjoy the use of this Ramsey product As always we have tried to compose our manual in the easiest most user friendly format that is possible As our customers we value your opinions comments and additions that you would like to see in future publications Please submit comments or ideas to Ramsey Electronics Inc Attn Hobby Kit Department 590 Fishers Station Drive Victor NY 14564 And once again thanks from the folks at Ramsey e 14 The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit Most problems can be solved without contacting the factory Notice that this is not a fine print warranty We want you to understand your rights and ours too All Ramsey kits will work if assembled properly The very fact that your kit includes this new manual is your assurance that a team of knowledgeable people have field tested several copies of this kit straight from the Ramsey Inventory If you need help please read through your manual carefully all information required to properly build and test yo
5. ODE PRACTICE OSCILLATOR KIT INSTRUCTION MANUAL Ramsey Electronics publication No MCPO3 Revision First printing January 2001 COPYRIGHT 1994 by Ramsey Electronics Inc 590 Fishers Station Drive Victor New York 14564 All rights reserved No portion of this publication may be copied or duplicated without the written permission of Ramsey Electronics Inc Printed in the United States of America 2 Ramsey Publication No Manual Price Only 5 00 INSTRUCTION MANUAL FOR CODE PRACTICE OSCILLATOR KIT TABLE OF CONTENTS Introduction 4 Circuit Description 4 Schematic Diagram 5 Parts Layout Diagram 5 Parts EISE atau eei e esa 6 Identifying Kit Parts 7 International Morse Code 8 Assembly Instructions 12 Testingz uec teet 14 Conclusion 14 Ramsey Kit Warranty 15 RAMSEY ELECTRONICS INC 590 Fishers Station Drive Victor New York 14564 IT Fax 585 924 4555 www ramseyelectronics com e 3 INTRODUCTION Morse Code has been used since 1837 It was originally used for telegraph communications and was the first method used for radio communications For many years Morse Code was required knowledge for any shipboard radio operator In 1910 the Titanic was the first ship to use the
6. T be connected They happen most easily when soldering IC s and other devices with pins close together The only technique for avoiding solder bridges is for you to be in complete control of the tip of your soldering pencil The best single tools for avoiding bridges are a proper point on the soldering iron bright light perhaps with some magnification of your work and thin diameter solder Study your connection before you zap it with heat and solder Choose the best approach angle for the iron s tip to heat the connection Plan ahead to let your solder do what YOU want it to do and you just won t make any solder bridges TEN COMMANDMENTS OF GOOD PC BOARD SOLDERING If the soldering iron tip is covered with burned rosin it cannot heat your connection very well If you heat only the wire and not the wire and PC trace together a cold bad connection is likely If your soldering tip is big enough to bridge two adjoining connections it probably will Dirty grubby solder will contribute to dirty grubby connections Any use of acid core plumbers solder in electronics work will destroy everything DON T USE IT A connection in a large area of PC board copper requires more heat than one pin of an IC If your connection looks dull or brittle it s no good If your connection looks like a ball instead of a shiny cone it s no good Thin diameters of shiny fresh rosin core solder are easier to use for KIT PC board work
7. as shown that brown orange red and silver resistor colors and tiny numbers on capacitors and transistors all start to look the same in dim light after a hard day s work IDENTIFYING KIT PARTS CERAMIC DISC CAPACITORS It is helpful practice to become as familiar as possible with the various marking codes for ceramic capacitors The first fact to keep in mind is that there are several accepted methods for marking the value of these capacitors While resistor color codes have withstood changing times over many decades the protocols for marking evermore tiny capacitors have many variations While capacitors also can be color coded Ramsey Kits use disc capacitors marked by a number letter code The first two digits establish the first two numbers of the value The third digit is the multiplier The letter designates the manufacturing tolerance or accuracy for the value printed Values under 100 picofarads used widely in our FM and VHF kits are printed clearly with no need to interpret them further Small capacitors stamped 4 7 10 15 33 68 and so forth are 4 7 10 15 33 68 picofarads respectively A 100 picofarad capacitor also commonly used in our kits can be marked either 100 or 101 If it s marked 100 believe it If itis marked 101 the value is 10 first 2 digits X 10 3rd digit multiplier 100 picofarads If itis marked 101J we know that it is made to 596 accuracy while H signifies 3 and is 1096 Rule of thumb If the 3r
8. ch be assured that the 1K ohm resistors are actually the missing 10 parts Hum m m I guess the red band really does look orange Ramsey Electronics project kits are packed with pride in the USA If you believe we packed an incorrect part or omitted a part clearly indicated in your assembly manual as supplied with the basic kit by Ramsey please write or call us with information on the part you need and proof of kit purchase 3 FACTORY REPAIR OF ASSEMBLED KITS To qualify for Ramsey Electronics factory repair kits MUST 1 NOT be assembled with acid core solder or flux 2 NOT be modified in any manner 3 BE returned in fully assembled form not partially assembled 4 BE accompanied by the proper repair fee No repair will be undertaken until we have received the MINIMUM repair fee 1 2 hour labor of 18 00 or authorization to charge it to your credit card account 5 INCLUDE a description of the problem and legible return address DO NOT send a separate letter include all correspondence with the unit Please do not include your own hardware such as non Ramsey cabinets knobs cables external battery packs and the like Ramsey Electronics Inc reserves the right to refuse repair on ANY item in which we find excessive problems or damage due to construction methods To assist customers in such situations Ramsey Electronics Inc reserves the right to solve their needs on a case by case basis The repair is 36 00 per hour r
9. d digit is a 0 you may assume the value is in picofarads and you can take the three numbers together as the picofarad value for that capacitor So just as in the above example both 470 and 471 are 470 pf e 7 INTERNATIONAL MORSE CODE lec e __ lecce e b eo 0 0 g 0 7 8 We with umlaut umlaut 9 period gi B B 8 question mark semicolon m eos colon iz oo slash e dash A with accent lapostrophe with umlaut 0 m parenthesis with accent underline Ewith accent _ e e 9 There is a growing trend to mark capacitors very clearly in nanofarads Be sure not to confuse 10nf or 100nf with 10 or 100 picofarads There s more Some manufacturers don t care about codes and print the value and tolerance VERY plainly 820 20 means 820 pf at 20 tolerance Yet another style of capacitor for values such as 1 uf is manufactured as a neat rectangular block with the value and other identifying data stamped on th
10. e top For example the information of interest to you in the marking 1J63 on such a capacitor is the 1 for 1 uf RESISTORS The universal color coding of resistors does not change fortunately but resistor body colors and the style of wire leads can vary Also resistors may be packed loose or supplied on tape strips Install any resistor as shown on the PC board parts layout diagram Keep all leads as short as possible 4 Band Code 2 5 10 5 COLOR 1st BAND 2nd BAND 3rd BAND MULTIPLIER TOLERANCE Black 1 ohm Brown 10 ohms 1 RN me omm m o pode S e ro 0 1 0 2596 0 5 1 2370 1 m A 5 10 BOARD SOLDERING Unprofessional soldering practices are the nightmare of ANY electronics manufacturer or service shop GOOD soldering is essential to the performance of your project A cold solder connection is caused by too little heat OR by heating only the component wire and not the wire and copper foil together The tell tale sign of too little heat is a dull rough looking connection If you heat only the wire the solder forms a cute ball around the wire and rosin may completely insulate your ball from the copper SOLDER BRIDGES You probably know that a solder bridge is a perfect and unintended connection of two PC board points that should NO
11. egardless of the cost of the kit Please understand that our technicians are not volunteers and that set up testing diagnosis repair and repacking and paperwork can take nearly an hour of paid employee time on even a simple kit Of course if we find that a part was defective in manufacture there will be no charge to repair your kit But please realize that our technicians know the difference between a defective part and parts burned out or damaged through improper use or assembly 4 REFUNDS You are given ten 10 days to examine our products If you are not satisfied you may return your unassembled kit with all the parts and instructions and proof of purchase to the factory for a full refund The return package should be packed securely Insurance is recommended Please do not cause needless delays read all information carefully e 15 CODE PRACTICE OSCILLATOR KIT Quick Reference Page Guide Circuit Description 4 Schematic Diagram 5 Parts Layout Diagram 5 Assembly Instructions 12 Ramsey Kit Warranty 15 REQUIRED TOOLS e Soldering Iron WLC100 e Thin Rosin Core Solder RTS12 e Needle Nose Pliers MPP4 or 5 e Small Diagonal Cutters RTS04 ADDITIONAL SUGGESTED ITEMS e Helping Hands Holder for PC Board Parts HH3 e Technician s Tool Kit TK405 e Desoldering Braid RTSO8 Manual Price On
12. international distress call SOS Until recently code proficiency was required for all amateur radio licensees and was even required by the Boy Scouts It still is required for the Signaling merit badge The is a fun educational kit for any skill level builder and can be used to introduce anyone to this historic means of communication CIRCUIT DESCRIPTION As the key is pressed providing the circuit a ground path and starting the cycle two things happen C1 starts to charge via R1 R3 and R4 At this time the output of pin 3 is high When the voltage on C1 reaches 2 3 of the supply voltage the output of pin 3 will go low and pin 7 is grounded starting the discharge cycle The capacitor is discharged through R1 When the voltage on C1 reaches 1 3 of the supply voltage the output at pin 3 goes high and pin 7 is no longer at ground This starts the charging cycle again Timing is completely independent of the supply voltage used It is determined by the values R1 R3 R4 and C1 The formula for the total time T of a complete cycle is T 0 693 R3 R4 2R1 C1 The component values provided allow a range of 1300 Hz to 1700 Hz The key is attached to pin 1 and provides the kit with a ground connection completing the circuit and turning the entire unit on The key is basically an on off switch Capacitor C2 filters out noise and R2 is a current limiting resistor for the speaker SP1 4 PARTS LAYOUT DIAGRAM RAMSEY
13. ly 5 00 Ramsey Publication No MCPO3 Assembly and Instruction manual for RAMSEY MODEL NO CODE PRACTICE OSCILLATOR 5 TOTAL SOLDER POINTS 29 RAMSEY ELECTRONICS INC ESTIMATED ASSEMBLY 590 Fishers Station Drive Victor New York 14564 Phone 585 924 4560 Fax 585 924 4555 Advanced 0 5 hrs www ramseyelectronics com
14. s Bend on the back and solder into place Be careful not to hold the iron on the joints so long that you melt the insulation on the wires 11 Now we re on to the more mechanical part of the CPO3 It s time to install the key First take one of the 4 40 screws and 4 40 kepnuts plus the one 4 washer These fit in the large hole on the PC board under the words Ramsey Electronics Place the washer on the screw and insert through the top side of the board then attach the kepnut to the bottom and tighten O 12 Next take the brass strip and line the hole up with the other hole in the PC board Place the screw through the brass strip then the board and attach the kepnut on the bottom O 13 The brass strip should be touching the screw on the opposite end and needs to be bent up slightly to form your key Just bend the brass up enough that it is not touching the other screw too much of a bend will make the key harder to push down to make contact Keep in mind that it is easier to bend the strip a little more than to try to unbend it O 14 Stick the four rubber feet on the bottom side of the board on the four corners The silkscreen shows the correct position of the feet That s it You re done building your code practice oscillator Before snapping a battery into place give the kit a good lookover Check for good clean solder joints and be sure there are no wire scraps lodged between components or traces e 13 TEST
15. ur kit is contained within the pages 1 DEFECTIVE PARTS It s always easy to blame a part for a problem in your kit Before you conclude that a part may be bad thoroughly check your work Today s semiconductors and passive components have reached incredibly high reliability levels and it s sad to say that our human construction skills have not But on rare occasions a sour component can slip through All our kit parts carry the Ramsey Electronics Warranty that they are free from defects for a full ninety 90 days from the date of purchase Defective parts will be replaced promptly at our expense If you suspect any part to be defective please mail it to our factory for testing and replacement Please send only the defective part s not the entire kit The part s MUST be returned to us in suitable condition for testing Please be aware that testing can usually determine if the part was truly defective or damaged by assembly or usage Don t be afraid of telling us that you blew it we re all human and in most cases replacement parts are very reasonably priced 2 MISSING PARTS Before assuming a part value is incorrect check the parts listing carefully to see if it is a critical value such as a specific coil or IC or whether a RANGE of values is suitable such as 100 to 500 uF Often times common sense will solve a mysterious missing part problem If you re missing five 10K ohm resistors and received five extra 1K resistors you can pretty mu
16. you throw out your lead scraps you ll have to find buss wire to make these important connections o Oagaaqaagudada NO a FB WN 1 Install U1 the NE555 timer oscillator IC To ensure that the part is seated flat on the PC board mount the part and place the circuit board component side down on the table top before soldering the leads This will keep the IC from moving while you solder it Solder all 8 pins Install C2 01 pF ceramic disc capacitor marked 01 103 or 10nF Install C1 1 ceramic disc capacitor marked 1 or 104 or 100nF Install R3 10K ohm brown black orange Install R1 1K ohm brown black red Install R2 270 ohm red violet brown You will now need to install a jumper wire JMP 1 Take one of your saved leads and form it into what looks like a staple whose width 12 corresponds to the hole spacing on the board marked JMP 1 Once formed install the wire just as if it were a resistor bend the leads out on the solder side of the board to keep it from falling out and solder 8 Install 5K ohm trimpot 502 1 9 Install the mini speaker SP1 Seat it flat on the PC board before soldering 10 Install the 9 volt battery snap You ll notice that the PC board is marked BLACK and RED on one end This is the location of the battery snap connector Once you have the wires soldered use the other set of holes and another clipped off lead bent into a loop to hold down the wire
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