Tektronix type 555 oscilloscope, over 100 tubes inside!
27:50
Tektronix 224 Oscilloscope Repair and Modification
23:04
Early 1940's RTL Airline Tube Tester Teardown With Explanation.
37:37
Standing Inside a Broadcast Transmitter While it's ON!
33:14
Tektronix 585A Restoration and Troubleshooting (Part 1)
41:01
EEVblog #1203 - REPAIR: Tektronix 2465B Oscilloscope
16:15
HP 198A Oscilloscope Camera: Old-School Data Collection
31:51
Tektronix: The Cathode Ray Tube - Window to Electronics
22:21