Al in Florida listened to VOA Radiogram, 28 February 2015, 0930-1000 UTC, on 5910 kHz, using NooElec Nano RTL-SDR USB stick with a RANVerter Pi upconverter [shouldn’t that be downconverter?] built from a kit, “all of this housed in a Wallgreens Drug plastic soap travel case!” …

Here is the radio in action, with the SDR interface on the computer display …

A a closeup of the spectrum display and waterfall …

One of the images he decoded with his SDR …

Tarmo in Estonia also used a USB dongle, an RTL-SDR, but instead of using a upconverter, he used modified drivers for the RTL-SDR from    github.com/mutability/rtl-sdr/  which allows shortwave reception …

Here’s one of the images Tarmo received 28 February 2015, 1600-1630 UTC, 17860 kHz (over 7000 km from the transmitter) …