Ramsey Electronics CW-700, Manual

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CW700
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pressing the paddles. When you have the desired tone, replace the
cover.
ˆ 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. Easy? Well, so is using our great
memory feature.
PROGRAMMING THE MEMORY
ˆ With the unit on, press S5, the “program” key. The LED will turn from its
normal green to yellow. This indicates that it is ready to be programmed.
ˆ Press the button for the corresponding memory bank [S1, S2, S3, S4].
LED will turn green.
ˆ Send your message. The LED should turn red the first time that you press
it. When the LED begins to flash, you have used up approximately 75% of
your memory. Please note that the memory may not necessarily last two
minutes per message. The length depends on the contents of the
message, and the speed with which it is sent.
ˆ Press the program button.
ˆ To play back the contents at any time later, press the desired memory
button.
TROUBLESHOOTING HINTS
Problem: Your CW700 keyer does not work:
ˆ All solder connections - this is the most frequent cause of failure. Check
these connections under a bright light and use a magnifying lens. Touch
up any connections that are less than perfect.
ˆ Correct orientation of all diodes, chips, electrolytic capacitors and
transistors.
ˆ Correct resistor and capacitor placement, “Is that a 10K where a 1K
should be?”
ˆ
The battery. You must check for correct orientation and the proper
voltage. If the battery doesn't work, chances are, your project doesn't
either! (How long has the battery been in the kitchen drawer?)
ˆ When checking voltages on the lines going to or coming from the ICs, you