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