I think you can see where I replaced the ProStick withe the ProStick+ (and I don't have nearby cell towers etc)
Due to the very wide-band (24 Mhz - 1766Mhz) R820T tuner chip of DVB-T dongle, It is not only cell phone transmissions, but other transmissions also, which overload the dongle.Very high frequency (VHF) 30–300 MHz
FM, television broadcasts and line-of-sight ground-to-aircraft and aircraft-to-aircraft communications, land mobile and maritime mobile communications, amateur radio, weather radioUltra high frequency (UHF) 300–3000 MHz
Television broadcasts, microwave devices/communications, mobile phones, wireless LAN, Bluetooth, ZigBee, GPS and two-way radios such as land mobile, FRS and GMRS radios, amateur radio, satellite radio
Nope - nothing special, only nearby RF sources are
Wifi router & VAP11N wifi bridge (on this Pi2)
ZigBee (for wireless central heating controller)
No nearby industry
No nearby visible antennas (surprised that no-one has asked about the one I use for ADSB)
This is PiAware 3.1 SD card image running on Pi2 with Planefinder feeder (and FR24 feeder running 2-4am).
No PiAware parameters have been tweaked - Its running on AGC setings.
Installed ProStick+ about 12 noon yesterday, replacing ProStick
Range rings are 25nm - outer ring 225nm