I have gotten a little confused on some transformer specs.

I notice that many transformers are rated at some impedance given some load.
For example:
Input Impedance = 10K
Output Impedance = 2K

Or, Input Impedance = 600 Ohm Output Impedance = 150 Ohm

It is obvious that there is some winding ratio involved, and I'm used to seeing the winding ratio, and calculating the winding to match a particular impedance: X = a^2 * Y (Where a is the winding ratio). If there is a ratio of 5:1, then the idea is to match the impedances.

Say you have a 600 ohm source, and an 8 ohm load: 600 = (a)^2 * 8 Then a = sqrt(600 / 8) a = 8.66

OK, fine.

Now, I'm looking for a transformer at "about" that winding ratio. BUT! I am finding transformers rated at certain impedance to impedance.

QUESTION: Can I use the same algebra to essentially calculate the winding ratio for that transformer? (Meaning - they specify some ratio only because certain transformers are designed specifically for applications - and other than power and current ratings, if I can figure out the winding ratio, I might hone in on what I want, right?)

Thanks!

Gary

I notice that many transformers are rated at some impedance given some load.

Or, Input Impedance = 600 Ohm Output Impedance = 150 Ohm

It is obvious that there is some winding ratio involved, and I'm used to seeing the winding ratio, and calculating the winding to match a particular impedance: X = a^2 * Y (Where a is the winding ratio). If there is a ratio of 5:1, then the idea is to match the impedances.

Say you have a 600 ohm source, and an 8 ohm load: 600 = (a)^2 * 8 Then a = sqrt(600 / 8) a = 8.66

OK, fine.

Now, I'm looking for a transformer at "about" that winding ratio. BUT! I am finding transformers rated at certain impedance to impedance.

QUESTION: Can I use the same algebra to essentially calculate the winding ratio for that transformer? (Meaning - they specify some ratio only because certain transformers are designed specifically for applications - and other than power and current ratings, if I can figure out the winding ratio, I might hone in on what I want, right?)

Thanks!

Gary