ESL Step Up Transformers

[mstejic]

I wanted to see if there is any interest in toroidal ESL step up transformers. I have more than I will need for my projects.

These potted transformers replicate the Final 0.3 transformer design. I have had very good success with them. Following are characteristics of this transformer:

Turns Ratio = 1:70:70 (1:140 overall)
Primary Inductance = 1.0 mH (min)

Primary Wires: Red, Black
Secondary Wires: Blue, Yellow (neutral), White

Dimensions = 3.18" (d), 1.54" (h)

Resistances:

Red:Black = .705 ohms (nominal)
Blue:Yellow = 85 ohms (nominal)
Yellow:White = 85 ohms (nominal)​

Leakage Inductance:

Red:Black = 5.0 uH (max)
Blue:White = short​

A picture is also attached to this post showing what the transformer looks like.

As I mentioned, I have enough of these transformers to support a number of other projects, provided you don't require production volumes ;-)

Milan

 

[mstejic]

ESL Transformer Diagram

Here is a schematic for this transformer.

 

[mstejic]

The dimensions for the transformer were not accurate in the original post. The correct dimensions are:

Dimensions = 3.25" (d), 2.25" (h)​

I wrote these dimensions down when I was specifying the part, but they didn't seem right on a second look. Sorry for the confusion.

 

[slr 5000]

hi
i am interested what price are you after

cheers sheafer

 

[mstejic]

Hi Sheafer

I sent you a private message with some more information on these. Let me know if you need more information.

v/r

Milan