Choosing DAC I/V transformer
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| Posted on November 10, 2020 at 13:38:47 | |
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Posts: 174
Joined: September 6, 2001 |
Hi all, I am trying to figure out which Lundahl transformer to use for I/V stage for a AD1865NK. I have a Audio Note Kit DAC2.1 currently. I have replaced the factory transformer with a Stevens Billington TX103 in 1:5 stepup, loaded with 1k at the secondary. This is what I had lying around and it sounds incredible. However, I want to move that back to MC stepup duty and need to replace it. I have been googling and seems like many ppl uses LL1674, some have LL9226, and going through the Lundahl datasheets, but there are also a few others that can be configured to 1:4 or 1:5. I would like to use amorphous core for the detailed sound. LL1674/LL1676 (just ratio difference?) LL9226 LL1931 LL1684 or should I use something with 1:1 ratio? The question is, what're the criteria other than the ratio. What else should I look for in order to maximize sound quality? the LL9226 is smaller in size but has lower primary/secondary DC resistance. Does that mean lower loss? but why is it smaller with smaller physical size? Also, does K&K keep all these in stock? are there lead time to ordering? Sorry for all the question and appreciate any help.
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