Weak RF range JA-82R - RF sensors

[MR Jim]

(28-08-2019 18:56)smith007 schrieb:  I would suspect 2 things.
Connection between antenna and the base modul are have some hf problems. The preamplifier of the 82R is defective.

Do you have you restart the EMA?
Can you meassure any changes in monitoring the rf level after restart?

If you have knowledge in electronics have a look at the preamp section (see attached picture).

If not it seems you must probably exchange the 82r with a newer one.

regards Chris

Thank you for your support Chris.
About the restart i dont know what EMA means. I have restarted the complete control panel. Also unplugged battery.

What i maybe have left to do is a complete reset. I dont know if it might change anything.

So after restart nothing changes in RF range. Nothing changes with temperature.

I had a look in the preamp section. Only two components are semiconductors.
Bandpassfilter and dubble diod.
No obvious fault. I i had a spare i would change them but i don´t.

Regards Jim