K&K Audio / Lundahl Transformers

Posted by Jim Womble (A) on June 20, 2006 at 17:17:05

In Reply to: Re: Power supply question posted by arend-jan on June 20, 2006 at 12:53:10:

Thanks for your input. I built a 2a3 amity, and it sounds very good - but I didn't pay any particular attention to the power supply - maybe I was lucky. I used 9uf/7hy/200uf. It is quiet. Someday I'll put better caps in to see if I can hear any difference (I am using Solens and JJ electrolytics, however I am using motor runs for the WE caps and as bypass caps on the JJ's on both stages). Next project is the 300B version. Anyhow, I decided I wanted to try the two section filter to see if I could get smoother dc with smaller caps. I have just started playing with the sim program, and I thought I was seeing a ringing on startup. It looked as though 2.2u/8h/47u/8h/94u didn't show the ringing, and had almost no ripple. Am I reading the sim correctly? I was planning based on 200ma current draw, hoping for around 450-475 volts (I am not going to run quite as hot as Lynn's version) using the lundahl 500v trans with a hybrid bridge.

• Re: Power supply question - arend-jan 15:28:11 06/21/06 (5)
  • Re: Power supply question - Jim Womble 17:56:27 06/21/06 (4)
    • Re: Power supply question - arend-jan 15:18:06 06/22/06 (3)
      • Question for arend-jan re: Input stage - Ironmonger 01:35:01 06/25/06 (2)
        • Re: Question for arend-jan re: Input stage - arend-jan 07:58:08 06/25/06 (1)
          • Re: Question for arend-jan re: Input stage - Ironmonger 10:40:13 06/25/06 (0)

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