Tubes Asylum

• Re: My Zanden dac uses 6CA4s in the PS. What is the best? - Sondek 06:45:06 07/23/02 (0)
  In Reply to: My Zanden dac uses 6CA4s in the PS. What is the best? posted by Norm on July 22, 2002 at 09:00:52:

  Check out previous post by Robert. Mullard EZ81 (same tube) is nearly always a good choice. They last forever. The U709 (spec's virtualy identical to 6ca4/ez81) has a slight edge in my opinion over the 6ca4/ez81 but good luck finding one. I have one made by Marconi and one by GEC. Can't tell much/any difference between the two. The U709 seems to make background a little quieter and bass a bit more solid. I have a Mullard EZ81 that came in my preamp that was in daily use for eight years. When I finally got round to rolling that tube I put in my tester and it still tested well into the "new" range on both diodes. It's in my backup/spare tube box waiting for its chance to get back into the game.
  

  • http://www.audioasylum.com/audio/tubes/messages/66853.html

  
  

  ---
• Gold Lion/GEC U709 - TY 23:33:39 07/22/02 (3)
  In Reply to: My Zanden dac uses 6CA4s in the PS. What is the best? posted by Norm on July 22, 2002 at 09:00:52:

  The best sounding 6CA4/EZ81 I have heard and by a far margin is Gold Lion/GEC U709.

  Tim
  Hong Kong Tube Audio Club
  http://groups.yahoo.com/group/hktubeaudio/
  
  

  ---

  • Re: Gold Lion/GEC U709 - Norm 09:50:38 07/23/02 (2)
    In Reply to: Gold Lion/GEC U709 posted by TY on July 22, 2002 at 23:33:39:

    Where can you get these?
    
    

    ---

    • Re: Gold Lion/GEC U709 - TY 23:16:07 07/23/02 (1)
      In Reply to: Re: Gold Lion/GEC U709 posted by Norm on July 23, 2002 at 09:50:38:

      eBay and local tube shop in HK.

      Very expensive. > US$100 each.

      Tim
      Hong Kong Tube Audio Club
      http://groups.yahoo.com/group/hktubeaudio/
      
      

      ---

      • Re: Gold Lion/GEC U709 - Norm 15:20:17 07/24/02 (0)
        In Reply to: Re: Gold Lion/GEC U709 posted by TY on July 23, 2002 at 23:16:07:

        I did not find any on Ebay, but you only get a short picture at any given time.

        Thanks for the advise.
        
        

        ---
• 6CA4s - Sector-7G 14:04:50 07/22/02 (1)
  In Reply to: My Zanden dac uses 6CA4s in the PS. What is the best? posted by Norm on July 22, 2002 at 09:00:52:

  Hi,
  I tried GE and Sylvania in a PS I breadboarded and found little if any measurable difference between the two. Measured B+ and conduction time and rise time to a specific voltage, not jsut a twitch in the positive direction although all were close with 3 different date tubes sample size between the two manufacturers. Very nice tube, almost SS efficient at up to 30 mA.
  regards,
  Douglas
  
  

  ---

  • Re: 6CA4s - Norm 14:19:22 07/22/02 (0)
    In Reply to: 6CA4s posted by Sector-7G on July 22, 2002 at 14:04:50:

    Thanks. I suspected that there were few differences.
    
    

    ---

This post is made possible by the generous support of people like you and our sponsors:

Parts Connexion

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---