Elecraft K3 Crystal Filter Manual - Manual (Page 5)

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• 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.
• Use a grounded anti-static mat on your work bench.
• If you choose to use one to work on your K3 for any reason, be sure your soldering iron is ESD-safe
with a grounded tip, tied to the same common ground used by your mat or wrist strap.
Preparing for Installation
Tools Required
1. #0 and #1 size Phillips screwdrivers. To avoid damaging screws and nuts, a power screwdriver is not
recommended. Use the screwdriver that best fits the screw in each step.
2. Soft cloth or clean, soft static dissipating pad to lay cabinet panels on to avoid scratching.
3. Small ruler to check screw lengths.
The following tools are strongly recommended:
1. ESD wrist strap.
2. Static dissipating work pad.
Parts Included
The following parts should be included in your kit. Check to ensure you have them all. If any parts are damaged
or missing, contract Elecraft for replacements (see Customer Service and Support, page 3).
Crystal Filter. There are two types of crystal filters, the standard 5-pole filter with discrete crystals and the
enclosed 8-pole filters as shown in Figure 1. The installation process is the same for each type. Markings on the
crystal will vary depending upon the bandwidth and type of filter.
STANDARD 5-POLE FILTER OPTIONAL 8-POLE FILTER
Figure 1. Filter Types.
In addition each filter is supplied with:
Screw, 4-40, 1/4” Zinc, one per filter.
Lock washer, #4, Inside Tooth, one per
filter.