Akos from the radioforeveryone.com blog (previously sdrformariners/rtlsdrforeveryone) has recently added several new posts. The first new post is a beginners guide to RTL-SDR accessories. In this post he shows and links to his reviews of various RTL-SDR accessory products such as upconverters, baluns, filters, preamps and adapters.
In the second post he shows a guide to 5 easy mods that can be performed on RTL-SDR dongles which will improve their performance. The mods include using a ground plane, using a wire antenna, extending the coax, removing the IR and LED diodes, and putting the dongle into a metal tin.
In the third post he discusses portable software defined radio and shows exactly what products and software you need to set up a an Android or Raspberry Pi based mobile SDR station.
In the remaining new posts Akos has created an RTL-SDR FAQ and a guide to understanding the legal and moral issues of SDR. Finally the last new post we saw is where Akos tests a cooled RTL-SDR V3 vs a stock V3. His results appear to show that the cooled dongle achieves slightly more (avg. 3.73%) position reports.