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CB-1 

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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 your 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 its 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 much 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 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, regardless 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. 

Summary of Contents for CB1 CHATTERBOX

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...

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