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No. They sent the JY-27A system, which only has a 1m^2 resolution (the B-2 is believed to have a radar signature in of around 0.1-0.75m^2 and the F-35 is closer to 0.01m^2), and is indefective against modern stealth aircraft. The YLC-8B allegedly has a finer resolution and may have intercepted an F-35, but I'm not sure if it had hardpoint-mounted bombs, lumberg lenses, or just within visual range. People who know the capabilities of the these systems aren't talking, and people who don't are, however.
Not correct understanding of radio physics. This radar signature only X band and close to X band. JY-27A is VHF band. Very different behavior. Stealth shaping do not work at all for VHF (wavelength is more large compare with feature size). RAM do not work. VHF signature will not be small. Resolution mean that can not target but do not have to do with detection object size.
Purpose of this radar is not target radar. Venezuela can watch F-35 with this radar, but what can do? Not very much.