Elecraft K3 Owner's Manual - Manual (Page 48)

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VFO A Knob Friction Adjustment
The VFO A knob’s spin rate can be adjusted by
moving the knob in or out slightly. The rubber
finger grip on the VFO A knob covers the knob’s
set screw, so it must be removed first.
In the following procedure, use only your
fingernails; a tool may scratch the knob.
Using your fingernails at the point identified below,
pull the finger grip forward slightly. Rotate the
knob and repeat until the grip can be pulled off.
Use the supplied 5/64" (2 mm) Allen wrench to
loosen the set screw.
Between the knob and front panel are two felt
washers which, when compressed, reduce the spin
rate. Move the knob in or out in small increments
until the desired rate is obtained. (Re-tighten the set
screw each time so you can spin the knob.) Then
and replace the finger grip.
VFO B Knob Friction Adjustment
Use the supplied 5/64" (2 mm) Allen wrench to
loosen the VFO B knob’s set screw.
Between the knob and front panel is a felt washer
which, when compressed, reduces the spin rate.
Move the knob in or out in small increments until
the desired rate is obtained, re-tightening the set
screw each time.
Real Time Clock Battery Replacement
K3 components or modules can be easily be
damaged by ESD (electrostatic discharge). To
avoid this, put on a grounded wrist strap (with 1
megohm series resistor) or touch a grounded
surface before touching anything inside the
enclosure. An anti-static work mat is strongly
recommended.
The battery for the real time clock/calendar is
located on the left side of the RF board. To access
it, turn power off, then remove the top cover as
described in Appendix A.
Remove the sub receiver module (KRX3) if present.
Remove the old battery.
If a KRX3 module (sub receiver) is installed,
the battery will be protected by a plastic sleeve,
which prevents shorting to the KRX3 module. Be
sure to save this sleeve and replace it when the
new battery is installed.
Replace the battery with the same type of 3-V
lithium coin cell (CR2032, BR2032, equivalent).
The (+) terminal is clearly marked on the battery; it
must be oriented as indicated by the (+) symbol on
the RF board. Re-install the KRX3 module (if
applicable) and the top cover.
To set the time, date, and date format, refer to the
following CONFIG menu entries: TIME, DATE,
and DATE MD. (Note: the CONFIG:BAT MIN
menu entry refers to a battery used as the K3’s DC
power source, not to the 3-V battery.)