[NLRS] Up to 6 GHz SDRs like Langstone Project

[Thomas Murphy]

It seems like there's been a proliferation in VHF to 6 GHz SDRs with the 
AD9363 (and 61) transceiver chips getting cheap enough to produce a 
variety of new designs that offer more features (Ethernet data 
interface, USB Type-C 3.0, clock sync) and newer FPGAs than the original 
ADALM-PLUTO and B210 SDRs that provided the foundations (and presumably 
part choices and layouts to rip off). Does anyone have recent experience 
with the newer options (Pluto Plus, LibreSDR, various "B210 compatible" 
boards)?

The 2x2 designs (some with internal low-level antennas switches for 
half-duplex) look handy if just to trade off between the amount of 
low-level switching required for multiband operation. It might even be 
cheaper to skip switches and just build multiple dual-band radios with 
the list price of some of the SDRs. Arbitrary microwave IFs also sounds 
useful for transverters. Anyone have projects building up more than lab 
environment transceivers?

-Thomas / WN1C