The measurements scenario with the RTL-SDR dongles, antennas and a PC.

LNA

RTL-SDR.com The SWLing Post

A Look Inside the RTL-SDR Kit (Software Defined Radio with Dipole Antenna Kit)

Nooelec - Nooelec NESDR Mini 2+ 0.5PPM TCXO USB RTL-SDR Receiver (RTL2832 + R820T2) w/ Antenna

Review: Airspy vs. SDRplay RSP vs. HackRF

raspberry pi

Low cost spectrum monitoring system based on Dragonboard 410C and RTL-SDR 2832U dongle

Includes 1x RTL-SDR Blog brand R860T (R820T2) RTL2832U 1PPM TCXO SMA V3 Dongle, 1x Dipole Antenna Base with 60cm RG174, 2x 23cm to 1m telescopic

RTL-SDR Blog V3 R860 (R820T2) RTL2832U 1PPM TCXO SMA Software Defined Radio with Dipole Antenna

New RTL-SDR Dongles with Metal Case Available in our Store

RTL-SDR Tutorial: GPS Decoding and Plotting

New RTL-SDR Drivers and SDR-Console ExtIO Available: Bias Tee Support, Direct Sampling, Tunable IF Filters and Improved Gain Profiles

Using our new Dipole Antenna Kit

What are some ways you've improved performance of an RTL-SDR? - Quora

What are your reviews about this cheap rsp1 clone? I'll be using it occasionally with electronic like arduino/rpi. Consider that RTLSDR costs ~4x more than this. : r/RTLSDR