TAB Funkenwerk AMI T67 Transformer

Stock Item, Usually Ships Same or Next Business Day

Stock Item: Ships from our shelf quickly in almost all cases when ordered before our ship cutoff times.

Direct Ship: Non-stock item, but normally ships quickly from the manufacturer or alternate warehouse.

Built To Order: Item is custom built per the options chosen and quickly shipped out upon completion.

More On The Way: The manufacturer is experiencing delays, but we'll ship quickly upon arrival.

New Item: We have this on order, the manufacturer hasn't shipped but you'll be in line upon arrival.

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The circuit for the U67 is very unique compared to other microphones.  The historic BV12 transformer is built very differently than your standard microphone output transformer.  Designed with a Primary, Secondary and Feedback winding, the Feedback is a voltage sensing or feedback circuit that if engaged as an output by itself will cause the transformer to behave in a non-linear fashion.  It is advised that one familiarize themselves with the technical aspects of a U67 before emarking on a DIY project.

The T67 provides the same flexibility as the BV12, the advantage being on a PCB board is that it is easier to make the necessary connections to utilize the T67.  All of the windings are attached to pins and are essentially open loops.  You must connect two Primary pins (and two Secondary and two Feedback) in order to create a loop with two terminals (see picture to left).  Tying the Primary and Secondary together creates a 7:1 output ratio while tying the Primary to the Feedback creates a 22:1 output ratio.

Our ONE WITH EVERYTHING ZEN WARRANTY extends the standard manufacturer warranty by one year, see our ZEN WARRANTY page for details.

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