FC-1 Choke Pin-out

[korneluk]

Given the assembly pin-out below, what is the connection for the FC-1 choke in common-mode?
upper bobbin 10-9-8-7-6
lower bobbin 5-4-3-2-1

 

[Paul Birkeland]

It's probably easiest to just show snippets from the old Paramount manual.

The "input" side is always the left most top and bottom terminal in the photos I attached.

 

[Paul Joppa]

Those photos from the manual are differential mode for the main inductance - only the leakage inductance is in common mode with that connection.

It's late so I won't try to describe the connections. I will show the spec sheet instead, and answer questions if necessary tomorrow  :^)