Forums https://www.decware.com/cgi-bin/yabb22/YaBB.pl SUPPORT FORUMS FOR ZKITS >> ZKIT 1 Support forum >> Alt output trafo graphs https://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1739964816 Message started by svartemarten on 02/19/25 at 11:33:36

Title: Alt output trafo graphs Post by svartemarten on 02/19/25 at 11:33:36 Hi, since in Europe I need to find an alternative to the Edcore output transformer. Have put in an order for a bespoke version: 10W, single ended tube output transformer for 8K Ohms to 4/6 Ohms. Primary impedance in range around 8000 Ohms preferab[/quote]ly (though 6000-8500 is OK). They have made some prototypes and initially did mention some problems eg. prototype #2: "My second prototype unit improved in performance from the first but not enough to meet our specified limits in frequency response of ±1db from 70Hz to 15kHz. I meet the high end of the frequency limit 15kHz for ±1db for all secondary taps BUT I don’t meet the low end of the frequency limit of 70Hz (-2.30db) for any of secondary taps." Now they came back with two graphs (need to scroll below) for prototype #3, saying they are improving but not entirely there. Can you help me interpret them, I have trouble doing so. Thanks in advance (main thread for my build.)

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