Fault finding in tube electronics - Wireless Set 19

The intercom amplifier (IC AMP) in my WS19 didn't work. This video is meant to demonstrate how you can diagnose faults in tube electronics in a safe way without high voltage present. First thing should be 'check if the tubes glow'. I could have been done with it a lot quicker. This video is not a 'highlights' video, but shows the quite long process of checking the various things that could be wrong.