120.28.213.3
In Reply to: RE: Thanks. Is that all: "a unity gain 1:1 transformer"? I ask because posted by Frihed89 on February 18, 2009 at 23:38:08
one : measure AC voltage out from your DAC chip, say at 100Hz, 500Hz, 2kHz and 10kHz(from a test CDs. stereophile, chesky, etc...) (use an o-scope. most DMMs are frequency selective). two, measure AC voltage at the grid of your first triode (again use o-scope). three, measure AC voltage out of the unit, at the RCA output. Let us start from there ... BTW, what is/are your tube/s and how is/are they configured? Let's get the voltages and then we ask the guys at tube diy. For all we know, you already have the best there could ever be ... A transformer could provide magical mids, but soft lows and highs. You'd probably need, assuming you need a pair at all, a very small transformer. Get one encased in what is known as mu-metal shield (metal cylinders) like the ones used in microphones or just a little bit bigger. But transformer specs has to conform to your specific circuit. Another btw, a bigger "improvement" could be achieved by building a better and separate power supply for both the digital board and the output tube/s. Cheers
Follow Ups:
Post a Followup:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2009, Audio Asylum, all rights reserved ]
[ Go Green ]
[ Take5 ]