I’ve got a tube based oscilloscope with a hand written sticker saying service is due in the ‘40s. The important info is stamped metal (model, serial number), or internal paper stickers (field manual).
It still worked last time I plugged it in. I’m not sure if I’ll be able to find someone to calibrate it when the 40’s roll around again. :-)
It still worked last time I plugged it in. I’m not sure if I’ll be able to find someone to calibrate it when the 40’s roll around again. :-)