I prefer to use vintage equipment to calibrate my oscilloscopes, mainly because I enjoy the challenge.
I just hate to see these golden age of electronics jewels going to the scrap and being destroyed. And at this time I have room for the larger 500 series stuff.
A TU-50 has been a want for quite a while now. I don’t need it, but I’d like a nice one to preserve.
So I sent you a PM Ricky.