Ramsey Electronics CB1 CHATTERBOX, User Manual

Page 1: ...ed for longer record and playback times Loud 2 Watt audio output Very clean low noise DAST storage technology provides excellent audio quality Seven modes of operation available Even interfaces to rad...

Page 2: ...R Series HF All Mode Receivers QRP Series HF CW Transmitters CW700 Micro Memory CW Keyer CPO3 Code Practice Oscillator Packet Computer Interfaces QRP Power Amplifiers RAMSEY MINI KITS Many other kits...

Page 3: ...Parts list 7 CB 1 Assembly instructions 8 Initial testing 17 Troubleshooting 18 Using the CB 1 19 Microphone considerations 20 Parts Layout diagram 21 Schematic diagram 22 KIT ASSEMBLY AND INSTRUCTIO...

Page 4: ...imply using your radio a lot This kit can take care of the tiresome tasks such as saying Over and out a call sign CQ your QTH or whatever Not only is this kit useful for repeating messages but it is v...

Page 5: ...an the switches for mode play and address PA3 chip selects the voice recorder and through the pulse shaping circuit of Q7 resets the ISD1020 IC chip The SP output of the ISD1020 is taken through volum...

Page 6: ...board for any possible solder shorts or cold solder joints All of these mistakes could have detrimental effects on your kit not to mention your ego Kit building tips Use a good soldering technique let...

Page 7: ...2 220uF electrolytic C3 15 RESISTORS r 1 2 ohm resistor red black gold R13 r 2 75 ohm resistor violet green black R2 3 r 5 1K ohm resistor brown black red R4 5 8 24 25 r 3 2 2K ohm resistor red red r...

Page 8: ...three pins r 2 Install voltage regulator VR1 7805 Observe correct placement of the metal tab Mount it so the lettering on the case is facing the edge of the board The 7805 provides a stable source of...

Page 9: ...side of the board to verify that all 28 pins are sticking through the board before soldering After you check that all 28 pins are properly in place solder all pins Be very careful in soldering since s...

Page 10: ...solder bridges when finished soldering This is where the microcontroller chip the IC with the sticker on top or marked XC705K1P is to be inserted Insert U3 into the socket being careful of bent under...

Page 11: ...1 2N3904 transistor Watch the positioning of the flat side r 42 Install Q2 2N3904 transistor watching the positioning of the flat side Transistors Q1 and Q2 are used to key an external radio r 43 Inst...

Page 12: ...orrect installation r 55 Install C7 10uF electrolytic capacitor Pay attention to polarity This is a DC blocking capacitor for the audio out of the ISD chip r 56 Install U2 LM380 audio amplifier IC Obs...

Page 13: ...1 use the same care that you used for installing DS2 r 70 Install R2 75 ohm resistor violet green black This is another current limiting resistor r 71 Install S2 one of the mini push button switches I...

Page 14: ...two joints check again to make sure the boards are square If all checks OK continue on to the rest of the solder pads checking for solder bridges as you go The more area that is connected with solder...

Page 15: ...te or other color wire from the pin on the potentiometer labeled SW B to the hole on the main board near VR1 labeled SW B Solder the wire in place r 86 Connect a 5 piece of black wire from the pin on...

Page 16: ...oldered in the correct places r 2 Make sure the power switch is turned off Plug in the 12VDC supply to J4 Make sure the center pin is the positive terminal and the outside of the jack is ground or neg...

Page 17: ...ibed go to the trouble shooting section of the manual to determine how to resolve the problem TROUBLESHOOTING TIPS PROBLEM Neither display lights when powered up and there is no sound SOLUTION Use a m...

Page 18: ...mike but allows audio to pass PROBLEM One or more switches won t work but everything else is OK SOLUTION Check the junction between your main board and the display board Many problems can arise here U...

Page 19: ...CB 1 19...

Page 20: ...you must understand the pins of the DIN connector on the rear of the unit 5 Pin DIN Jack Connections Pin 1 Audio output to radio mic in Pin 2 Ground Pin 3 Push to talk open collector Pin 4 Radio speak...

Page 21: ...CB 1 21 CB 1 PARTS LAYOUT DIAGRAM...

Page 22: ...be assured that the 1K ohm resistors are actually the missing 10 K 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 b...

Page 23: ...CB 1 Assembly and Instruction manual for RAMSEY MODEL NO CB 1 RAMSEY ELECTRONICS INC 793 Canning Parkway Victor New York 14564 Phone 716 924 4560 Fax 716 924 4555 REQUIRED TOOLS Soldering Iron Radio S...