I'm just starting to work with Transformers and while doing electronic experiments I found that I didn't know much. I'm trying to find an Audio Transformer with a ratio of 1:10 or 1:20 with an inductance of about 670 Ohms. After searching through the DigiKey website on Audio Transformers everything appears to have a ratio of 1:1. But there are specifications like 3.4kCT Primary, 4/8/16 Secondary.
What does the CT mean? And How do I calculate based on these numbers what the ratio would be or to find this type of transformer I suppose it's not a Audio Transformer any longer.
Can I find this transformer http://www.conrad.com/ce/en/product/739679/670-Audio-Transformer-110 at Digikey?