Elecraft K2 Owner's Manual - Manual (Page 7)

6
E
LECRAFT ®
Transmitter
Power output range <0.5 W to >10 W (typ.);
power setting resolution 0.1 W,
accuracy 10% @ 5 W
Min. supply voltage 9.0 V min for 2 watts out
recommended 4 9.5 V min for 5 watts out
10.0 V min for 7 watts out
10.5 V min for 10 watts out
Duty cycle 5 W, 100%; 10 W, 50%
Spurious products -40 dB or better @ 10 W (-50 typ)
Harmonic content -45 dB or better @ 10 W (-55 typ)
Load tolerance 2:1 or better SWR recommended;
will survive operation
into high SWR
T-R delay approx. 10 ms-2.5 sec, adjustable
External keying 70 WPM max.
CW sidetone 400-800 Hz in 10 Hz steps
Keyer
Keying modes Iambic A and B; adjustable weight
Speed range 9 - 50 WPM
Message memory 9 buffers of 250 bytes each; 1-level
chaining; auto-repeat (0 - 255 s)
4 For reference only; not guaranteed. If higher power than shown here is to be
used for a given supply voltage, monitor transmitter output signal.
Receiver
Preamp On Preamp Off
Sensitivity (MDS) -135 dBm -130 dBm
3 rd -order intercept 0 to +7.5 5 +10
2 nd -order intercept +70 +70
Dynamic range,
Blocking 125 dB 133 dB
Two-tone 96 97
I.F. 4.915 MHz (single conversion)
Selectivity,
CW 7-pole variable-bandwidth crystal
filter, approx. 200-2000 Hz
SSB 6 7-pole fixed-bandwidth crystal
filter, 2.2 kHz typ.
Audio output 1 watt max. into 4-ohm load
Speaker internal: 4 ohm, 3 W;
Rear-panel jack for external speaker
Headphones 4 - 32 ohms, stereo or mono
5 Varies with band.
6 With optional SSB adapter. Other CW and SSB fixed crystal filter options
may be available