The K2 is a full-featured HF transceiver with the options you have come to expect from radios costing over twice as much. Two VFOs with multiple memories, split TX/RX operation, RIT/XIT, full break-in CW, memory keyer, narrow IF crystal filtering, excellent RX dynamic range, and IF-derived AGC are standard on the K2.
Performance: We've designed big rig features and performance into the K2. Eric and Wayne have experienced CW operators, so solid CW performance (in addition to SSB) is a priority with the K2. Excellent sensitivity and dynamic range, Full QSK Break-in (diode switched), adjustable RX/TX CW pitch, High-Speed Memory Keyer, Selectable RX Sideband, and Sharp IF Crystal Filtering are standard.
Low Power Consumption
The K2 is designed for use both at home and in the field. The K2’s low receive current (approx. 150 mA in battery save mode) makes portable operation possible from small gel cell batteries. The K2 even includes an option for an internal 2.9-Ah rechargeable battery.
Build the K2 for QRP or 100W Operation The K2 offers efficient QRP CW operation with up to 15 watts output. Build it as a K2/100 by including the internal KPA100 option to get a full-featured 100W radio. The KPA100 kit of internal parts, including its micro-controller and heatsink, fit totally inside the K2. The KPA100 includes an internal speaker and an RS-232 Aux I/O computer control rig interface (equivalent to the KIO2), SWR / Power metering, and microprocessor-controlled silent PIN diode switched T/R.
No SMT (surface mount) assembly: For those of you who have asked, we are not using surface mount devices in the K2. Elecraft is committed to making easy-to-construct, full-featured HF rigs. (We do have some surface mount devices on the KDSP2 DSP filter, which are pre-installed by Elecraft.)
Easy Alignment: No sophisticated test equipment beyond a digital multi-meter is required to align the K2. Our built-in microprocessor and A/D circuitry monitor all-important signals and provide user feedback during calibration. They even include a built-in general purpose frequency counter, volt meter, and radio current drain meter. Our thousands of K2 owners will attest to their success building the K2!
Customizable: We've designed the K2 for easy user modification. All interfaces and signals are fully described in the manual.
K2 STANDARD FEATURES Specifications and Pricing subject to change without notice. Rugged, attractive custom enclosure
Small, portable size: 2.9h x 7.8w x 8.2d inches
Weight 3.3 lbs. (excluding internal options)
80-10 meter ham band+ coverage; 160 m optional
Efficient 12 Volt (10 - 15 V) operation for home or field
Receive current as low as 150 mA (battery save mode)
CW-only or SSB/CW + Digital Modes with SSB option
Back-lit LCD and LED bargraph; day/night settings
PLL synthesized--low phase noise Microprocessor controlled
3 transverter bands; programmable display, I.F., power
Dual VFOs with split operation.
Direct keypad entry of frequencies and memory channels.
RIT and XIT with four offset ranges
Built-in high-efficiency speaker
Memories store mode, VFO A/B, split, RX filter, etc.
Simple menu system for advanced settings. (Up to two menu functions can be assigned to the two programmable front panel function keys.)
Room for additional connectors on the rear panel
Smart ‘hunt and pounce’ band-scanning mode
RECEIVER Low-noise, single-conversion superhet receiver
Double-balanced diode mixer for excellent dynamic range
Receive sensitivity: 0.15 uV (pre-amp on, typical.)
Narrow ham-band, double-tuned bandpass
RX/TX filters, relay switched for better IMD response
Smooth, fast attack, I.F.-derived AGC (no "popping")
Switchable preamp and attenuator
Variable-bandwidth I.F. crystal filtering
Multiple VFO tuning rate selections
10 Hz tuning resolution
Bar graph S/RF OUT/ALC meter
TRANSMITTER Adjustable 0.1-15 W (K2), 0.1 – 100W (K2/100)
Rugged, SWR-protected, push-pull PA transistors
Programmable current limit for battery operation Harmonics and spurious outputs: Better than –40 dBc CW FEATURES Full diode switched break-in with variable QSK delay (Both at QRP and 100W levels)
9-memory keyer; iambic A and B; adjustable weight
9-50 wpm (internal keyer); 70+ wpm (external keying)
Programmable message repeat interval
Simultaneous computer and paddle CW keying inputs
Variable bandwidth crystal filter (approx. 200 - 2000 Hz)
Adjustable RX CW offset with tracking TX side tone.
Selectable opposite sideband RX for QRM reduction