Api 312 input transformer question

[Buttercup1]

Hi all

Just in case the old thread is TOO old, I found some scans and a pdf of an API 312 and, forgive me if this is a stupid question but, it has 6 holes for the input transformer but most available options have 8 pins.
Please can someone let me know what I am missing...

Thank you!

 

[Khron]

I'd be willing to bet the 8 pins on the transformers are four separate windings. The 6 connections would likely be 4 for the ends of the primary and secondary, and the remaining 2 for the center taps of the primary and secondary.

Comparing the schematics to the circuit boards would easily confirm that.

 

[john12ax7]

8 pins is a common package type,  but that doesn't mean all 8 are actually used.  The main thing is to have each connection go to the proper place.

 

[Walrus]

The original API 2622only has 6 pins.

 

[Whoops]

Just in case the old thread is TOO old, I found some scans and a pdf of an API 312 and, forgive me if this is a stupid question but, it has 6 holes for the input transformer but most available options have 8 pins.
Please can someone let me know what I am missing...

The 2 Pins diference are probably the Case/Shield and the Electrostatic Shield.
The Capi2622 , Ed Anderson 2622 , Avdo TR2622 and Cinemag CMMI-8APC all have 2 separate pins for Case/Shield and the Electrostatic Shield.

On the Schematic Walrus posted of the 2622 the Electrostatic Shield is connected to case and then both connected Pin4.
Maybe internally connected?