I got another better one from a government auction. It was 'beyond calibration' according to the paperwork. When I put it on the bench, the last person to use it had placed the vertical gain in the full variable setting; and left it! They tried to calibrate it without returning the knobs to the 'cal' position! I need to reserve time, to fix their mess, and I'll have another toy....

💗💙💗💙🤠👍🥳🥳😁