开云体育

Thanks Siggi for your response,
Just to confirm, on this image /g/TekScopes/photo/300382/3881289?p=Created%2C%2C%2C20%2C2%2C0%2C0 ,
is the 50 ohm resistor number 1? (top left) Do you know what the component marked number 2 is?

Either way, I cannot measure 50 ohms on my BNC. So perhaps the resistor is open, or perhaps the relay contact is not making connection.

Next time that I open up the scope I will play around with the relays.

And as has been mentioned in this thread, I will study the cleaning methods for this attenuator elsewhere in this forum.

Cheers!
Neil