Hello Dave, I just gave a look into the diode type. Waht I can see is they are both completely different one from another.
What I have seen before when it comes to swr metters is "to have 2 Germanio diodes", one for the forward and other for the reflected. I will buy the one you mentioned and I will replace them.
Thanks a lot Dave for your prompt repply!!! It could be the reason but those are "already mounted" (SMD), right? is there any replacement / retrofir to fix that one?
Any action needed from my side? What are the right ones?