I'm looking at buying a 2465B that's supposedly needs a U400. Scope appears to work somewhat (calibrator trace looks good, etc.) and price is good.
I'm wondering what I may be getting into here. Are U400's very hard to find at a reasonable price? I see them on eBay but wondered if there's a better source (perhaps here?) for them.
Also, is it "normal" for the 2465B to display any trace (e.g. the calibrator) when U400 is bad? In other words, I'm wondering if U400 is really the problem with it or possibly something else (apparently it won't calibrate). NVRAM maybe?
Thanks,
Barry - N4BUQ
