13Audio

Western Electric 91a

Thanks to “PF” in Switzerland the mystery from Read here

Is solved…..

The field coil lodged inside the 509a cabinet is connected at j2 and acts as choke and field coil.

Thanks….
  

Leave a Reply

Fill in your details below or click an icon to log in:

Gravatar
WordPress.com Logo

You are commenting using your WordPress.com account. ( Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. ( Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. ( Log Out /  Change )

Cancel

Connecting to %s