[hornychz]

If you have the time, could be interesting do the same tests but using the 20 cm long antenna in the receiver?

Hi, Werk_AG,
yes, of course, it's a great idea!

I've used in my RX units 16 and 20 cm antennas. Now I've exchanged the both them for 5 cm and both RX units work perfectly on. But at this moment they are in the basement in my office. By default, the main RX unit is in the engine room and, unfortunately, almost touching the metallic copper pipes. And there I witnessed only by the 16 cm antenna, nothing else here does not work.

I'll prepare another test

Regards