Elecraft W1 - Manual (Page 2)

2
ESD-Sensitive Parts
Some of the parts in this kit are sensitive to damage from electro-static discharge (ESD). Problems caused by ESD damage
may be very difficult to troubleshoot because damaged components may still operate somewhat rather than fail completely.
We strongly recommend you take the following anti-static precautions (listed in order of importance) to avoid trouble:
 Leave ESD-sensitive parts in their anti-static packaging until you install them. The packaging may be a special
plastic bag or the component’s leads may be inserted in conductive foam. Parts which are especially ESD-sensitive
are identified in the parts list and in the assembly procedures.
 Wear a conductive wrist strap with a series 1 megohm resistor. If you do not have a wrist strap, touch a ground
briefly before touching any sensitive parts to discharge your body. Do this frequently while you are working. You
can collect a destructive static charge on your body just sitting at the work bench. DO NOT attach a ground
directly to yourself as this poses a serious shock hazard.
 Make sure your soldering iron is ESD-safe and has a grounded tip
 Use a grounded anti-static mat on your work bench.
Identifying Parts
In some cases the component marking is self-evident. For example, a 1N5711 diode may have “1N5711” stamped on its
body. When the markings are not so obvious, the marks you should find to identify individual components are shown in
parenthesis in the parts list and text. These may be numbers such as “(103)” on capacitors or colors on resistors such as “(brn-
blk-red)”. Look for the color band sequence starting near one end of the component. Some resistors have dark blue bodies
that make identifying the colors difficult. Use your DMM to verify the value if you aren’t sure. Remember that your DMM
usually will indicate a value close to, but not exactly what is shown due to normal tolerances in the components and the
DMM.
There may be more numbers, letters or color bands on a component than those shown in parenthesis. The additional markings
may change from unit to unit and are not important for identifying the part supplied with the kit.
Reference. Designator Description Qty
Part
Number
Misc. W1 Power Meter Printed Circuit Board 1 E100308
B1 Battery Holder 1 E980074
C1, C2 .001µF (102) Capacitor 2 E530074
C3, C10 .047µF (473) Capacitor 2 E530131
C4, C5, C6, C7, C11, C12, C16, C17 .01µF (103) Capacitor 8 E530130
C8, C9 22µF 25V Electrolytic Capacitor 2 E530012
D1, D2, D3 1N5711 (5711) Diode 3 E560004
D4, D5, D29 1N4148 (4148) Diode 3 E560002
D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17,
D18, D19, D20, D21, D22, D23, D24, D25
Rectangular LED, Red 20 E570026
D26 Round LED, Green 1 E570027
D27 Round LED, Yellow 1 E570028
D28 Round LED, Red 1 E570025
J1, J2 BNC Connector, PC Mount 2 E620020
J3 Stereo Jack, Miniature 1 E620027
J4 Jack, 2.1 mm, 12VDC Power 1 E620026
R1, R2 51Ω 3W Resistor 2 E500178
R3, R4, R5 332K, 1% (org-org-red-org) 1/4W Resistor 3 E500254
R6, R7, R9 49.9K 1% (yel-wht-wht-red) 1/4W Resistor 3 E500255
R8 47K (yel-vio-org)1/4W Resistor 1 E500067
R10 240 Ω (red-yel-brn) 1/4W Resistor 1 E500281
R11 2K (red-blk-red) 1/4W Resistor 1 E500280
R12, R13, R20 24.9K 1% (red-yel-wht-red)1/4W Resistor 3 E500120
R14 1K (brn-blk-red) 1/4W Resistor 1 E500013