ELECRAFT K2 Reference guide

K2 Quick Reference Card
Top Label=Tap
Display Filter # & BW: Press
Xfil +AGC AGC ON/OFF:
Press PRE/ATT + AGC
Bottom Label=Hold ½ second
Display:Volts / Amps
Restore factory default: (RESET ALL K2 FUNCTIONS)
Turn off K2, hold 4,5,6and turn back on.
Play/Rec Keyer:
Press MSG; Press 0-9 Direct Frequency Entry: Tap BAND+ + BAND-, Enter 4 or 5 digits
Auto repeat: Tap MSG, Hold 0-8 Set Power to 3 watts or less, before using ATU
PTT/SPEECH:
Hold VOX ("L" or "U" flasheswhen in
SSB VOX mode)
Lock: decimal flashes
Scan - Setup (single-band scan only)Store VFOA (lower)
& VFOB (upper) for band edges of interest. Select
operating mode: preamp / attenuator, tuning
rate. Press STORE; Press 0-9
Test/Operate:
Hold VOX, CW mode C flashes Scan (initiate): Hold 0-9 when STORE or RCL a Memory.
Split frequency:
A or B flasheswhen on Hold LEVEL once to set noise blanker threshold Low,
Hold LEVEL again to set noise blanker threshold High
OVERVIEW
RIT / XIT: 2 RIT/XIT Ranges +/- 0.6,
+/-1.2 KHz. flasheswhen RIT2 on
Tap NB once to turn on nb1, Tap NB again to turn on
nb2, Tap NB again to turn off noise blanker
Set BFO/FIL: FCTR in TP2, Band between 160-17M,
Select CW, CAL FIL, Hold Edit. Band+=BW,
Band-=BFO. Use Xfil and set up as shown in table
below. [*t= SSB TX: change with caution!!] [**Use
correct Calibration number from envelope]
Linearize VCO: FCTR in TP1. Select VFO
frequency, CAL PLL, Hold edit. 1800.1,
3500.1, 7000.1, 10000.1, 14000.1, 18000.1,
21000.1, 24800.1, 28000.1
S LO:RF Gain CW, turn VFO Knob CW until left
segment turns off. About 180. Program PF1/PF2: Most useful PF1/PF2 settings: RIT, ATU, SCAN, SSBC.
S HI: RF gain CCW, turn VFO Knob CCW unit right
segment just turns on. About 22
Power Save: LCD Day, Grph off, Opt Battery, Preamp
off, Use headphones
Peak bandpass max signal, then power
out: (in order) 80: L3/L4; 40: L1/L2;
30: L8/L9; 20: C21/C23; 17: C32/C34;
10; L12/L13, 12: C44/C46
PROCEDURES
Frequency calibration: FCTR and external counter on TP1, select
28 MHz, match counters using CTRL-C22. [You must re-run CAL
PLL (on all bands) and CAL FIL (tweak all BFOs) before you'll get
any benefit out of the C22 change! ]
VCO Align: Frequency set to
4000.1, DMM to left side of
R30). Adjust L30 for 6.0 Volts
Mode FL1 BF1t* FL2 BF2 FL3 BF3 FL4 BF4
CW/REV (4913.6/4916.0) OP1 4913.6/16.0 0.7 4913.1/14.3 0.4 4913.1/14.3 0.1 4913.0/14.2
LSB/USB (4913.5/4916.2) OP1 4913.5/16.2** OP1 4913.5/16.1 1.8 4913.0/15.5 0.7 4912.7/14.7

MENU COMMANDS
ST L / ST P: Set Side Tone [L]evel / [P]itch
Select with main knob, BAND+ or BAND-,
Hold EDIT to change:
t-r: QSK delay. 0.02 Default rPt: CW message Repeat intrvl iAb: iambic A or B
inP: Paddle hand, normal, reverse LCd: night-backlight on, day off GrPH: dOt, bAr, OFF
CAL: Off, FCtr, FIL, PLL, CUR, S LO, S HI PF1/2: Select User-programmed Function PF1/2
SSbA: Audio, SSbC: Speech
Compressor rAnt: Aux Rec Ant switch OFF, ON per Band OPt: Perf, Battery
ATU: Automatic Tuning Unit L0-L8 / C0-C8: Test individual ATU element
AUTO: Normal auto-tune; use with most antennasCALn: Used for calibration of C55 (null). L/C set
to 0; network set to Cin. POUT: Forward/Reverse power display
CALP:Used for calibration of R1. L/C set to 0;
network set to Cin. ALT: Alternate auto-tune; use with short whips, etc. (much longer tune times)
Lxx.x / Cx.xx: Ind(uH)/Cap(nF) in use***CALS:Used to check SWR calibration. L/C set
to 0; network set to Cin. x.x-1: SWR from most recent tune-up***
INFO CODES: 010 Battery Voltage too low, 80 IOC Problem, 81 AuxBus Problem, 90/91 EEPROM write
test failed, 201 EEPROM initialized, 230 BFO not connected to Freq Cntr, 231 VCO not connected to
Frequency Counter, 235 PLL Ref Oscillator range error,
***(stored per-antenna, per-band)
BAND LISTING (Band, Band Segments, QRP Calling Frequencies-Novice, Europe, PSK31)
CW SSB
160 1.8 1.81 1.838 1.843 1.91 2.0
80/75 3.5 3.56 3.579 3.58 3.71 3.75 3.69 3.985 4.0
40 7.0 7.035
7.04 7.080
7.035
7.03
7.06 7.110 7.112 7.15 7.09 7.285 7.3
30 10.1 10.106 10.116 10.140 10.15
20 14.0 14.06 14.070 14.15 14.285 14.35
17 18.068 18.096 18.100 18.11 18.13 18.168
15 21.0 21.06 21.110 21.080 21.2 21.285 21.385 21.45
12 24.89 24.906 24.920 24.93 24.95 24.990
10 28.0 28.06 28.110 28.120 28.3 28.36 28.385 28.885 29.7
K2 28.715