Elecraft K3 Owner's Manual - Manual (Page 17)

17
Rear Panel
Connector Groups
The appearance of your rear panel may vary
depending upon the options installed.
Antennas: ANT1 (SO-239) is standard. ANT2
(SO-239) is supplied with the KAT3 ATU option,
which includes an antenna switch controlled from
the front panel. Both jacks are nominally 50 ohms
when the ATU is bypassed. AUX RF (BNC) is for
use with the KRX3 option; see pg. 37 and pg. 41.
ANT3 (BNC, on the KPA3 option panel) is the
antenna jack for the optional K144XV 2-m module.
DC: 12 VDC IN jack is an Anderson PowerPole
connector rated at 30 amps. (See Specifications, pg.
8, for detailed power requirements.)
12 VDC OUT (RCA/Phono) provides up to 0.5 A
(switched) for use with accessory devices.
Ground Terminal: A good station ground is
important for safety and to minimize local RFI.
KPA3: This option panel is blank in the K3/10
except for ANT3 (see above). In the K3/100, the
blank panel is replaced with the fan panel shown,
which includes a circuit breaker.
KIO3 (pg. 18): The KIO3 is an upgradeable digital
and audio I/O module providing computer and
auxiliary control signals, single or dual (stereo)
speaker outputs, line level in (mono) / out (stereo),
and supplemental headphone (stereo) and mic jacks.
KXV3: The KXV3 provides a variety of RF I/O
signals, including receive antenna in/out (pg. 41),
transverter in/out (pg. 39), and a buffered I.F.
output for use with panadapters such as the Elecraft
P3 (pg. 45). The KXV3A also includes internal IF
connections for the K144XV 2-m module.
Keying: PADDLE (1/4” phone jack) is the keyer
paddle input (see CONFIG:CW PDL menu entry).
KEY (1/4” phone jack) can be used with a hand
key, external keyer, computer, or other keying
device. PTT IN (RCA/Phono) is for use with a
footswitch or other external transmit control device.
KEY OUT (RCA/Phono) is the amplifier T-R relay
keying output, capable of keying up to +200VDC
@ 5A.
REF IN (SMA): External 10-MHz reference input
for use with the K3EXREF option module (see
CONFIG:REF CAL and CONFIG:XVn OFS).