The Chinese-made RS-918 is a compact, multi-band, HF rig with a maximum output of 10W. Its touchscreen display includes a colorful bandscope with waterfall option and provides readout of various parameters such as frequency, DSP and noise reduction settings, SWR, S-meter, RF power and more. It even includes a workable cw decoder. Many of the parameters are user-configurable through the menu. A speaker is built-in. This is an all-mode unit that includes SSB, digital modes and even FreeDV. It can be connected to a computer via two USB ports. However, as a hardcore cw operator, I have only used it in cw mode and my comments are based only that; I have not tested other modes.
It is easy to update the firmware, and an active group of international developers regularly provides updates that either tweak existing functions or add new ones.
Other “pros” include easily-selectable output power levels (including .5, 1, 2, 5 watts – perfect for QRP), a tune button, a zero-beat indicator (though the indicator jumps around and takes some getting used to), an easily adjusted iambic keyer with speed readout, and dual VFOs. Both the DSP and the NR (noise reduction) are adjustable and function well. There is an adjustable RF gain/AGC control. Bandswitching is done through up/down buttons. Sidetone/offset frequency is selectable. Calibration, adjustment and parameters are set through extensive menus, but once set, the menu rarely needs to be accessed.
The rig has a 2 ¾ x 7” faceplate, with a built-in tilt stand. Knobs are nicely-machined metal and many of the push-buttons have dual functions, but they are organized in a logical way. Once I’d figured it out, I found the layout convenient and comfortable to use.
The rig does have some downsides. Some of the parameters can be accessed through the touchscreen, but some of the touchscreens aren’t very responsive. Fortunately, most things also can be accessed in other ways. Plug wiring for a straight key is not standard. The built-in SMD fuse is hard to change, so it’s best to use an additional in-line fuse in the DC line. There is no built-in antenna tuner.
This rig is not plug-and-play. It comes from the factory without being calibrated, so a number of parameters like PA bias must be adjusted immediately. Documentation is on line but it isn’t always easy to decipher and with firmware updates, may not be totally current. Much of the operation is different than a conventional, non-SDR rig. Consequently, there is a fairly steep learning curve involved. In addition, quality control is not great, and factory support is poor, so there are significant risks in buying from China, eBay or Amazon. Fortunately, however, Mike, K0JTA, who runs the user group for this rig, also sells the rig after testing it, updating the firmware, setting the basic parameters including the built-in TCXO, and generally ensuring that the rig is working well and ready to go. To me, the few extra dollars he charges are well worth the cost.