Specifications

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Specifications
GENERAL
Frequency Range
310 kHz - 32 MHz and 44-54 MHz; 144-148 MHz with KX3-2M option. Transmit
excluded in some ranges (varies by country). See receiver sensitivity note below.
Frequency Stability
+/- 1 ppm typical over 0-50 C
Antenna
50 ohms; HF: BNC jack; 2 meters: SMA (supplied with KX3-2M option)
Modes
USB, LSB, AM, FM, CW, DATA; built-in PSK/RTTY/CW text decode/display
VFOs
Dual VFOs (weighted VFO A knob); 150+ memories; scanning/channel hopping
Accessory I/O (ACC2 Jack)
KEYLINE: 30 V, 100 mA max, open drain; GPIO: 0-3 V (see ACC2 IO menu entry)
Supply Voltage
and Current
8 V min, 15 V max. 1 to 2 A typical in transmit; 150 mA minimum receive, typical
(backlight off, preamp off, no signal)
Size and Weight
Size: 3.5 x 7.4 x 1.6”, HWD (8.8 x 18.8 x 4.1 cm); weight: 1.5 lbs. (0.68 kg) less
options
RECEIVER*
Sensitivity (MDS)
-138 dBm (typ.), 20 dB preamp; -140 dBm typ. on 6 m with 30-dB preamp; -142 dBm
on 2 m. (500 Hz bandwidth.) Note: Sensitivity rolls off below 1.8 MHz due to
protective high-pass filtering; preamp-on MDS @ 0.55 MHz, 94 dBm (typ.). Image
rejection in 0.5-1.5 MHz range can be improved by installing KXAT3 option.
Image and I.F. Rejection
55-70 dB typ. (varies with filter settings, mode, and band)
Audio Output
Internal speaker, 0.5 W typ.; headphones/ext. speaker jack, 0.1 W/channel (stereo)
Receive Features
8 band RX EQ, tunable I.F. passband width/shift, optional roofing filters (KXFL3)
TRANSMITTER*
Output Power
10 W PEP, 160-15 m; 8 W PEP, 12-6 m; 2 m (KX3-2M): 2+ W, 144-148 MHz.
Supply voltage of 11 V or higher (on key-down) required for settings above 5 W.
5 W or less recommended for high-duty-cycle modes (FM, AM, DATA). Power will
automatically be reduced if PA temperature or current limits are exceeded.
Internal ATU (KXAT3)
8 L/8 C network; matching range typ. 20:1 or higher. Rated power: 15 W.
Insertion loss (bypass mode): < 0.5 dB, 160-10 m; < 1 dB, 6 m.
Voice Transmit Features
Split-band, adjustable speech compression; 8-band TX EQ; VOX; 2 DVR messages
CW Transmit Features
Full and semi CW break-in with adjustable delay; diode T/R Switching; 6 messages
Carrier Suppression
> 50 dB typ.
Harmonic / Spurious Outputs
> 50 dB below carrier @ 10 W (> 60 dB on 6 meters)
CW Sidetone/Transmit offset
400-700 Hz, adjustable (receive filter center frequency tracks sidetone pitch)
* Specifications apply only within ham bands except as noted. All measurements taken with 13.8 VDC supply.