Bottlehead Forum

General Category => Technical topics => Topic started by: korneluk on January 24, 2019, 02:32:50 PM

Title: FC-1 Choke Pin-out
Post by: korneluk on January 24, 2019, 02:32:50 PM

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

Title: Re: FC-1 Choke Pin-out
Post by: Paul Birkeland on January 24, 2019, 04:00:45 PM

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.

Title: Re: FC-1 Choke Pin-out
Post by: Paul Joppa on January 24, 2019, 08:21:43 PM

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  :^)