Panadapter with RF Analyzer for Android and RTL-SDR Stick.

Using a slightly obsolete Android tablet and installing the "RF Analyzer", combined with an RTLSDR dongle, good results are obtained. Of course you need to have the IF output from your HF radio. In my case, I use my Yaesu FT-100 with 68 Mhz IF output and a RTLSDR V.3 dongle