RSU2 resistors. How to recognize a resistor?

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Hi everybody!

I'd like to know what means the writing "RSU2" printed on some resistors of a 1990 tube amplifier.

I can't understand if they are wirewound or metal oxide resistors or anything else.

I would apreciate it if you could explain me how to generally recognize a type of resistor (wirewound, film, etc.) by the writings on it or whatever other characteristic.

thank you
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.