Ramsey Electronics CW-700, Manual

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CW700
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ˆ 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.
ˆ 63. Install R19, a 10K ohm resistor [brown-black-orange]. Stand it up!
ˆ 64. Next, install R21, a 1K ohm resistor [brown-black-red], and make
sure that it’s standing.
ˆ 65. Put in C12, a .01uF disc capacitor [marked .01 or 103 or .01uF].
ˆ 66. Install Q3, a 221334 PNP transistor, making sure that the flat side is
facing correctly. You may notice that both sides may appear flat. We
refer to the flat side as the side that is flat the whole length of the part.
See the parts layout diagram for proper installation.
You have just installed the circuit that sends a computer signal out when you
send. This gives a skilled kit builder the power he needs to to experiment
with his kit.
ˆ 67. Install R33, a 10K resistor [brown-black-orange]. Mount it standing
at attention, like a soldier being inspected (or our college intern being
questioned!).
ˆ 68. Install R24, a standing 1K resistor [brown-black-red].
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69. Install C15, a .01uF disc capacitor [marked .01, 103].
ˆ 70. Find Q4, a BS170 field effect transistor (FET) [marked bs170].
These transistors do much the same job as other transistors, but have a
high input impedance. This way, they can amplify small signals without
using a lot of the signal’s power. FETs use the same technology found
in modern computer chips. Solder it in place, paying attention to the
correct positioning of the part.
Aside from a number of large parts, such as the potentiometers on the front
and the speaker and battery, only the power supply is missing from the
circuit. Take a well deserved break. Relax your eyes, clear your mind, even
take a peek at our catalog to get some other great ideas about your next kit
to build! When you come back, we will put the finishing touches on our
circuit.
ˆ 71. Install C16, a 10uF electrolytic capacitor. Be aware of the polarity,
as you would with any electrolytic capacitor. C16 is located near the
battery holder.