That's a good point, one could experiment with loading resistors on the secondary of the transformer to damp any ringing from transformer parasitics. It shouldn't be a lot of resistance, which is good because you don't want to burden the voltage output DAC with too much load.
Cinemag is an excellent choice as well. I would call them directly - David is a nice person to work with, and will suggest the best xfmr for the application.
Cinemag is an excellent choice as well. I would call them directly - David is a nice person to work with, and will suggest the best xfmr for the application.
I removed the 200R resistors today and I like the results. Presentation is cleaner. I can hear better the words of songs.
What are your thoughts on this transformer? It has an 80% nickel core which I suppose makes it higher grade but at the lower price compared to other Jensen Transformers.
http://www.jensen-transformers.com/datashts/11hfmpc.pdf
Oon
http://www.jensen-transformers.com/datashts/11hfmpc.pdf
Oon
Should do just fine. Max signal capability is a little lower, but still within the range of the DAC
Hi there,
I'm Oon's brother. Wondering if there is any formula or starting point for the transformer output loading Zobel network?
Alex
I'm Oon's brother. Wondering if there is any formula or starting point for the transformer output loading Zobel network?
Alex
Yes, there are some snubber threads somewhere on the forum that will help with that. Or you can just aim for a total load on the secondary of 3K-5K ohm. Most voltage DAC chips are happy driving 1K loads. I don't see a lot of ringing with 3-5K on the secondary.
As for nickel, I prefer not going above 50%. There are some things in the DAC output I just don't want to pass. 😉 But different people have different tastes.
As for nickel, I prefer not going above 50%. There are some things in the DAC output I just don't want to pass. 😉 But different people have different tastes.
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