Found a setting that displayed internal triggering, as no external signal source was available for display photo.This scope should be excellent for display of high end tube amplifier waveforms to compare channel gain and distortion factors. Use this scope to examine the input and output of each tube or transistor stage to find those power robbing parasitics and make necessary corrections. Or use this item to service those tricky vintage tube and transistor television sets in your collection.

Will pack well for shipping. Shipping via USPS or UPS to CONUS only. Shipping costs handled entirely by eBay shipping services. This is a vintage item so no warranty, guaranties, or returns due to age and rigors of transport. Accessories and manual should be available from other sellers on eBay. Questions? Please ask and best attempts will be made to make the sale perfect.