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Ramsey Electronics CW-700 Manual

Micro memory cw keyer
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MICRO MEMORY
CW KEYER
THE KEYER THAT NEVER FORGETS
Ramsey Electronics Model No.
Now you can send perfect quality code at any speed! This
computerized "smart key," for novices and pros alike, even lets
you store your own personal messages for a fraction of the cost
of other keyers!
•
A state of the art microcontroller lets you send perfect quality code
anytime, at any speed!
•
Four memory banks allow you to record your own personal
messages for up to two minutes long. Just press a button and your
call is on the air.
•
Optional memory upgrade kit connects easily and allows up to 32
messages to be saved.
•
"Non-volatile" memory technology will store your messages for
years using no power. You'll go silent before your keyer!
•
Super sensitive iambic touch paddles have no moving parts. Why
pay big money for expensive paddles, when touch pads offer better
performance?
•
An internal speaker and earphone jack make this the ideal keyer for
learning or teaching code. Perfect quality code makes learning
easier.
•
Just plug it into your rig and you are on the air.
•
Thanks to the Ramsey Electronics learn-as-you-build method, both
new and old hams will learn electronics while they have fun.
CW700 • 1
CW-700

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Summary of Contents for Ramsey Electronics CW-700

  • Page 1 Perfect quality code makes learning easier. • Just plug it into your rig and you are on the air. • Thanks to the Ramsey Electronics learn-as-you-build method, both new and old hams will learn electronics while they have fun. CW700 • 1...
  • Page 2 1994 by Ramsey Electronics, Inc. 793 Canning Parkway, 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. CW700 • 2...

  • Page 3: Table Of Contents

    CW700 Assembly instructions ..12 How to use the CW700 ....23 Troubleshooting ......24 Flow chart diagram ...... 26 Ramsey kit warranty ....27 RAMSEY ELECTRONICS, INC. 793 Canning Parkway Victor, New York 14564 Phone (716) 924-4560 Fax (716) 924-4555...

  • Page 4: Introduction To The Cw700

    INTRODUCTION TO THE CW700 THANK YOU for purchasing the CW700 Micro Memory Keyer. We are very proud of this kit, like all of our others, and hope that you find it both enjoyable and educational. We’ve packed a lot of value into it and we know that you will be pleased with it’s operation.
  • Page 5 There is nothing better than using equipment that you have constructed yourself, and a nice looking keyer can be a great addition to any station. • And you want it to be mechanically durable, so it can be used reliably when and where you want to, for years to come.

  • Page 6: Circuit Description

    CIRCUIT DESCRIPTION Looking at your circuit, you will see that the circuit can be broken down into four basic parts. The first part is the power supply. The power supply circuit converts the nine volts DC power coming into your circuit into the clean five volts needed to power the computer circuitry properly.
  • Page 7 Again, we seriously hope that you enjoy building this kit, and find it educational too. Ramsey electronics has a complete line of electronics kits for both hams and electronics fans all over the world. We look forward to your patronage in the future.

  • Page 8: Parts List

    CW700 PARTS LIST RESISTORS 47 ohm [yellow-violet-black] (R12) 470 ohm [yellow-violet-brown] (R22, 23, 30, 31) 1K ohm [brown-black-red] (R3, 4, 5, 8, 11, 20, 21, 24, 32) 2.2K ohm [red-red-red] (R17) 10 10K ohm [brown-black-orange] (R1, 2, 13, 18, 19, 26, 27, 28, 29, 33) 47K ohm resistors [yellow-violet-orange] (R9, 16) 22M ohm [red-red-blue] (R7, 14) 5K ohm potentiometer [marked 502] (TONE, R15)
  • Page 9 MISCELLANEOUS PARTS AND HARDWARE RCA jacks (J4, J5) Miniature earphone jacks (J3, J6) 1/4” stereo jack (J1) Miniature speaker (SP1) Push button switch (S1, 2, 3, 4, 5) 9 volt battery connector (B1) 9 volt battery holder Eight pin IC socket (SOC1) Sixteen pin IC socket (SOC2) No.

  • Page 10: Parts Layout Diagram

    CW700 PARTS LAYOUT DIAGRAM CW700 • 10...
  • Page 11 CONSTRUCTION Since you may appreciate some “warm-up” soldering practice as well as a chance to put some “landmarks” on the PC board, we’ll first install some “hardware” components. This will also help us to get acquainted with the up - down, left - right orientation of the circuit board.
  • Page 12 4. Place the two miniature earphone jacks (J3, J6) on the board. Mount them flush with the board and solder all connections. Cut off any excess leads and check to see if your soldering connections are in good condition. Now that you have had a chance to get a little soldering practice, we will start by constructing the touch sensitive circuit.
  • Page 13 13. Now that we have installed most of the touch sensitive circuit, we will install the digital chip that will detect your touch. Identify U1, a 14 pin chip labeled 74HC04. On the chip, there is a little notch, dot or band on one end.
  • Page 14 22. Install D12, a 1N4148 glass bead diode. Don't forget to check the polarity! Install D6, D11, D7, D9 and D8. all 1N4148 glass bead diodes. Make sure that the bands are pointing in the right direction. When you are done, they will all be facing the same way. These diodes help the computer decide exactly which button is being pushed.
  • Page 15 We offer an optional kit, the CW700MX, which simply plugs into the socket. This upgrade, the CW700MX will store up to 32 messages. 33. Install R28, 10K ohm resistor [brown-black-orange]. 34. Install R27, 10K ohm resistor [brown-black- orange]. Capacitor Speed 35.
  • Page 16 46. Install R29, a 10K resistor [brown-black-orange]. Mount this resistor standing up too, please. It is located next to U3. 47. Install R30, a 470 ohm resistor [yellow-violet-brown] standing up. 48. Install R31, a 470 ohm resistor [yellow-violet-brown] standing up. 49.
  • Page 17 62. Using the clippings that you saved from other components, or using the busswire wire supplied in your kit, collect seven wires between one half inch and one inch long (JMP1, JMP2, JMP3, JMP4, JMP5, JMP6, JMP7). Using the parts layout diagram, or the print on your PC board, install all seven jumpers into the circuit.
  • Page 18 72. Install VR1, a 7805 voltage regulator. The 7805 steps down the voltage on the board so that it is usable by the components. It also allows for the wide input voltage range of the CW700. The writing on the part should face the back of the board, metal tab towards front.
  • Page 19 In order to save you money, we buy our parts in bulk. This is why R25 and R10 are identical. For the speed control, there is no use for the switch feature. Therefore, you have two choices. One is to simply disable the switch feature.
  • Page 20 Solder Magnif ied Solder v iew Front PC board Solder f illet betw een PC Main PC boards board Solder PA D DL E MO UN T ING D IA GRA M f illet betw een PC boards POT EN T IO M ET ER MO U NT ING D IA GRA M 83.
  • Page 21 into place, and the front board will be at a 90 degree angle with the main board. Make a solder connection between the paddles and the front board where they pass through. Now, all three boards should be properly positioned. 87.
  • Page 22 pressing the paddles. When you have the desired tone, replace the cover. To set the sensitivity, press the paddles. Turn R6 with a phillips head screwdriver. Intermittently press the paddles and adjust the sensitivity until you are comfortable with “feel” of the setting. That’s all you need to know to send code.
  • Page 23 must be aware that there can only be two “states” on a wire: a logic one and zero. Therefore, you should measure a voltage between zero and .5 volts, or between 2.5 and 5 volts. Any reading between .5 and 2.5 indicates a possible problem and all associated components should be checked.
  • Page 24 CW700 • 24...

  • Page 25: Flow Chart Diagram

    CW700 FLOW CHART DIAGRAM CW700 • 25...
  • Page 26 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.

  • Page 27: Cw700 Assembly Instructions

    Desoldering Braid (RS-2090) Price: $5.00 Ramsey Publication No. CW700 Assembly and Instruction manual for: RAMSEY MODEL NO. CW700 MICRO MEMORY KEYER RAMSEY ELECTRONICS, INC. 793 Canning Parkway Victor, New York 14564 This Quality Electronics Phone (716) 924-4560 Kit was designed and (716) 924-4555 CW700 •...