Quote Originally Posted by RonSSS View Post
Tektronix scopes? I have a 547 I need to fix. They were an engineering marvel for sure and hand craftsmanship at it's finest!
I still work for the company.
Yes, Tektronix. The one that works is a 535A, and the other one is a 533A. I don't remember what the one I pulled the tubes from was...... maybe a 545? It even had a second case full of the modules.