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I have an indoor version of the X108 and have it working with WSJT-X. One thing I have found is that rig control is picky about the USB cable that is used. If your radio is not working with the PC, try a different USB cable or the one that came with the radio. I then choose IC-7000 as the radio...

If winding your own BALUN for a dipole, consider type 31 or type 43 ferrites when using a transmission line or guanella type winding. Also using small coax instead of bifiler windings will increase the bandwidth of the BALUN. RG-400 is a great option, but there are other coax types that also...

I use an EFHW for 40m (64ft or 19.5m) with a 49:1 UNUN and it is resonant on 40, 20, 15, 10 without a tuner. The 49:1 is made of type 61 ferrite, and is a 2:14 turns ratio with an added capacitor to bring the higher frequencies in line with the ham bands on 10m. The counterpoise is only 2ft...