A number of customers considering the KX2 have asked us how it compares to the newly announced Yaesu FT-818. The latter is an updated ‘817, with a bit higher power output.
In terms of form factor, the ‘818 is essentially unchanged from the ‘817. So it’s worth asking again: just how “ultra portable” can an HF radio be?
Here’s how the KX2 stacks up:
--- Half the size ---
The KX2 occupies 24 cubic inches, vs. 52 cubic inches for the ‘818. With dimensions about that of a medium-sized HT, the KX2 is truly pocket-sized.
--- Half the weight ---
At just 13 ounces, the KX2 weighs 60% less than the ‘818. For hikers or backpackers, this means well over a pound of total weight saved. The light weight of the KX2 is also compatible with extended hand-held operation.
--- Twice the power output ---
The KX2 puts out up to 12 watts on 80-20 m and 10 watts on 17-10 m. This is roughly twice the FT-818’s max output (6 watts). The KX2 also includes highly effective speech compression (not included with the ‘818). Taken together, these advantages translate to more QSOs, especially in difficult conditions.
--- 50% more battery power ---
The FT-818’s internal battery, at 18 watt-hours, has more capacity than the FT-817’s. But the KX2’s internal battery has still greater capacity -- 24 watt-hours. This extra 50% allows you to operate longer between recharges.
--- One third the current drain ---
Typical receive-mode current drain of the KX2 is 150 mA. The FT-818, at about 400 mA, is nearly three times higher. The KX2’s lower current, combined with the larger battery size, works out to over 4 times longer operating time RX-only, or 2 to 3 times longer for typical transceive operation.
--- Built-in ATU ---
The KX2 has a wide-range internal ATU option that allows multi-band use of ad-hoc field antennas, whips, etc. There’s no need to carry a separate antenna tuner, loading coils, or even coax: just attach a wire or collapsible whip directly to the radio, and let the ATU do the work.
--- DSP ---
Unlike the ‘818 or ‘817, the KX2 includes digital signal processing (32-bit I.F. DSP). This provides a wide range of features typically found only on desktop radios, including: adjustable noise reduction and noise blanking, auto-notch, variable filter bandwidth/shift, audio peaking filter for CW, full stereo receive, and RX/TX EQ. You can even listen on both VFO A and B frequencies at the same time (dual watch).
--- Built-in data modes ---
The KX2 offers built-in PSK31, PSK63, RTTY, and CW encode/decode, with text displayed on its alphanumeric LCD. CW and data-mode QSOs can even be logged internally, then sent to a PC when you return from a field outing. A computer can be connected to the KX2 via the supplied USB cable (for text display/keyboard) or via the headphone/mic jacks (for FT8 and other audio-based data modes).
--- Built-in mic, keyer paddle, and tilt stand ---
You can use either an external mic (MH4) or the KX2’s internal mic. The internal mic is positioned optimally for HT-style operation. In CW and DATA modes, you can use an external paddle, or directly attach our KXPD2, which weighs only one ounce and uses the rig itself as the base. For table-top use, the KX2 features a fold-out tilt-stand. This creates a 3-point mount that also works well on rough surfaces (ground, rocks, etc.).
--- Large, easy-to-read display ---
The KX2’s display is five times larger than the FT818’s, with separate VFO A and B fields, S/RF-meter and DSP passband graphic, icons showing operating state, and alphanumeric text capability. In addition, the KX2’s LCD is transflective; it is highly readable in direct sunlight. The backlight is highly efficient and can be turned off to further increase battery life.
The KX2 starts at $769, factory assembled. For additional details, see:
A few notes on the KX3
The KX3 is a bit larger than the KX2, though still smaller/lighter than competing all-band portables. It includes the following additional features: 160 and 6 meters; 2 or 4 meter optional internal transverter; nearly twice as many direct controls; and RX I/Q outputs for use with our PX3 panadapter or computer sound cards. The KX3 is available factory assembled or as a no-soldering kit.
So there you have it. I know, I'm biased! And while I readily admit that I am indeed biased towards Elecraft, I would never denigrate anyone's differing opinion. My passion is portable ops and I just feel that as far as that goes, Elecraft gives you some of the best options available - especially for portable ops!.
72 de Larry W2LJ
QRP - When you care to send the very least!