Thank you very much. The next step will be that...
At the moment, I have the output attenuator disassembled, and I see that the central relay (the 16 dB one) must be wrong, since it attenuated about 30 dB. After opening it and bridging the contacts, it seems to improve, reaching 20 dB (although I can't get the 16 dB that it should have). It seems to be in poor condition. Does anyone know where to buy an equivalent one?
It has 8 pins in a 5mm x 4mm square.
