ELECRAFT 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 4,5,6 and 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" flashes when 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 flashes when 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. flashes when 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

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 antennas CALn: 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