[werk_ag]

20cm - unusable
1.5m - unusable

... the last two antennas are not applicable at all, even I bought them for 433MHz band!

Regards

Hi Zdenek

Thank you for your labor and time spent to elaborate this analysis. At least for me this matter is always complex.
I have all types of antennas that you used in your tests, and your results seems to coincide to my practical observations, which leads me to make a question: As said, and just based on my practical observation, the last two types of antennas indeed proved to be very bad for transmission purposes, but for reception, are the ones from where I get better results... interesting I think.
If you have the time, could be interesting do the same tests but using the 20 cm long antenna in the receiver?





My main receiver is using one of those 20cm antenna, and the backup receiver, is using the other type (1.5m cable), with the antenna placed outside.