Line Sockets
An attempt to categorize the various types of line sockets found on older tek scopes
Twist Lock
Have only seen one on a 549. Was this available as an option on some models?
3 pin Edison (recessed)
3 pin Edison (proud)
Found on a majority of the 500 series scopes
2 pin (recessed)
Found on older, non-plugin scopes, such as the 514