good rf receiver 433Mhz

Knew all of this, because I read "Karl Rothamel's Antennenbuch" many moons ago back to front multiple times.
Thanks for the reply anyway, but I think you missed the real question.
You can minimise problems of receiver impedance, cable impedance and aerial impedance by using the right length transmission line. Reflections are in the same phase with single or multiple wavelength * Velocity cables.
I found that cheap superregenerative receivers without frontend easily "detune" and get very insensitive with the wrong aerial. Maybe I'm nitpicking here.
Leo..