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Re: Want to upgrade my Audio Note DAC 1.2

152.163.188.5

There are at least two choices that I can think of now (maybe more later). First and easiest is to disconnect your tube stage and use an LL1636 transformer to directly step-up the resistor voltage. Since the impedance is very low, it works fine. The LL1636 is capable of a 26dB step-up, which is probably enough. Second, you could use a quasi-parafeed output leaving the coupling capacitor in place and coupling the signal to the outside world using an LL1674 connected for 2:1 or 4:1. It would be better to have a constant current source or choke in place of the upper triode, but it will still work with an SRPP.

What do you think?

Kevin

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