transformer specs....

[Gibson486]

I have a MET-23 transformer.

The impedance is 1.6kohm. Does that mean I simply use jwL, where L is 1.6K?

Also, on the spec sheet,

http://www.tamuracorp.com/clientuploads/pdfs/engineeringdocs/MET-23.pdf

The picture shows a dot on leg 1 and 4. What do those dots mean? And i can feed it backwards, correct? I was going to feed the secondary side so i can get a higher voltage on the primary side.

 

[Modelworks]

The picture shows a dot on leg 1 and 4. What do those dots mean? And i can feed it backwards, correct? I was going to feed the secondary side so i can get a higher voltage on the primary side.

Without seeing the circuit is connected to can't provide specifics but generally it is a 22:1 ratio transformer and you can feed it backwards to produce a higher voltage on the primary at the cost of the amount of current output. I see a lot of projects that use these or similar audio transformers to output high voltages from battery sources. The one radio shack sells is a popular model I see quite a bit used for powering EL displays that need 100+VAC and you are using a 5VDC supply.

 

[PowerEngineer]

Well, this transformer is much smaller than the ones I usually see!

Be careful with your interpretation of the 1.6 k-ohm primary impedance. This isn't the impedance of the primary winding itself, but is instead the impedance that will appear across the primary winding when there is a 3.2 ohm impedance (of whatever nature) across the secondary winding (the increase being a function of the square of the turns ratio between primary and secondary windings). Reread the top of the spec sheet.

Yes, you can backfeed it.

I believe the "dots" are to indicate the polarities of the two windings.

Good luck!

 

[donfm]

I have a MET-23 transformer.

The impedance is 1.6kohm. Does that mean I simply use jwL, where L is 1.6K?

Also, on the spec sheet,

http://www.tamuracorp.com/clientuploads/pdfs/engineeringdocs/MET-23.pdf

The picture shows a dot on leg 1 and 4. What do those dots mean? And i can feed it backwards, correct? I was going to feed the secondary side so i can get a higher voltage on the primary side.

Inductance (L) is not measured in ohms it's measured in Henrys so it can't be 1.6kohm. Are you speaking of the Inductive Reactance of the coil which is measured in ohms and frequency dependent? You did tell me you were an electrical engineer correct? I would think these elementary calculations would be child's play for an EE.