Elecraft K3 Owner's Manual - Manual (Page 9)

9
RECEIVER (Main and Sub)*
Sensitivity (MDS) -136 to -138 dBm (typ.), preamp on, 500 Hz bandwidth. 6 m MDS with PR6 option:
-143 to -144 dBm (typ.). Reduced sensitivity near 8.2 MHz (first I.F.) and from 44-
49.5 MHz. Sensitivity decreases gradually below 1.8 MHz due to intentional high-
pass response at the T-R switch. (Use RX ANT input or sub receiver’s AUX input to
avoid the high-pass filter loss.) Note: KBPF3 option required for full general
coverage (including 0.49 to 1.7 MHz).
Dynamic Range IMD3 > 100 dB, Blocking 140 dB, typical (at 5, 10, and 20 kHz spacing)
Image and I.F. Rejection > 70 dB
Audio Output 2.5 W per channel into 4 ohms; typ. 10% THD @ 1 kHz, 2 W
S-Meter Nom. S9 = 50 µV, preamp on; user-adjustable
Noise Blanker Adjustable, multi-threshold/multi-width hardware blanker plus DSP blanker
Receive AF graphic EQ +/- 16 dB/octave, 8 bands
Filter Controls IF Shift/Width & Lo/High Cut with automatic crystal filter selection
* Receive specifications are guaranteed only within ham bands. Dynamic range measurements based on 400-Hz, 8-pole
filter.
Other available filters have very similar performance; see www.elecraft.com for full list.
TRANSMITTER *
Output Power K3/100: 0.1 W –100 W typ. Suggested max from 51-52 MHz, 85 W; 52-54, 70 W.
K3/10 (or K3/100 with PA bypassed): 0.1 W –12 W, HF-10 m; 8 W max on 6 m.
XVTR OUT (KXV3 option): -10 to +1.8 dBm. K144XV: ~10 W, 144-148 MHz.
Note: Output can be set up to 110 W. However, IMD and spurious products are
specified at 100 W, the recommended max. If a KAT3 ATU is installed, actual
output will be slightly lower (typ. loss < 0.5 dB below 28 MHz, < 0.8 dB above).
Duty Cycle CW and SSB modes, 100% 10-min. 100W key-down at 25 C ambient
True RF Speech Processor Adjustable compression
Transmit AF graphic EQ +/- 16 dB/octave, 8 bands
SSB TX Bandwidth 4 kHz max (> 2.8 kHz requires 6 kHz AM filter)
SSB TX Monitor Post-DSP filtering/processing
VOX DSP-controlled, adjustable threshold, delay, and anti-VOX
Full and Semi CW Break-In Adjustable delay; diode T/R Switching
SSB Carrier Suppression > 50 dB
Harmonic / Spurious Outputs > 50 dB below carrier @ 100W (> 60 dB on 6 meters)
CW Offset/Sidetone 300-800 Hz, adjustable (filter center frequency tracks sidetone pitch)
Mic Connector Front panel, 8 pin; rear panel 3.5 mm. Switchable DC bias ( MAIN:MIC SEL )
* Transmit specifications are guaranteed only within ham bands.