Posted by bcherry (M) on July 17, 2006 at 05:09:02

In Reply to: Re: Ella mods: screen diodes posted by Goneill on July 15, 2006 at 21:55:13:

Al, just want to confirm if you have connected your diodes the same way?
Brian
Take control! DIY.

• Re: Calling Al - Goneill 06:38:28 07/17/06 (6)
  In Reply to: Calling Al posted by bcherry on July 17, 2006 at 05:09:02:

  Hi Brian,

  I think Al is using his Ella in triode mode, so it will look like:

  
  
  

  Note that in both UL and triode cases the diode faces towards the screen, pin 4. Al, can you confirm this?

  Thanks,
  Graham
  
  

  ---

  • Re: Calling Al - tubegarden 15:33:12 07/17/06 (5)
    In Reply to: Re: Calling Al posted by Goneill on July 17, 2006 at 06:38:28:

    Yes, that is the correct orientation, cathode toward the screen :)

    On mine, I just put the diode from pin 6, where the 220R was already tied, to the plate, pin 3.

    Previously, I converted to triode mode by snipping the UL tap from pin 6 and using some tasty silver plated copper wire to jumper to pin 3.

    As the diodes I was able to find were a bit overspec, I used the silver wires to tie to the monster leads :)

    The amp sounds fine.

    I have ordered some VH caps for the output coupling. A friend thinks they are 'really something'.

    Will report after I put them in and get the required 400 hours break in on them ...

    
    
    

    ---

    • V-caps - Goneill 16:41:58 07/17/06 (4)
      In Reply to: Re: Calling Al posted by tubegarden on July 17, 2006 at 15:33:12:

      Thanks for the note. That sounds like a good way of mounting the diodes. I believe the resistor should always be as close to pin 4 as possible to stop any oscillations so using pin 6 as a tag point is a good way to go.

      Regarding the caps, anything that says "cost no object" worries me! Which ones have you ordered (0.1, 0.15, 0.22)? And what have you got at the moment that you'll be comparing them to?

      Please do let us know how it goes so we can start saving the pennies!

      
      
      

      • Teflon caps   (Open in New Window)

      
      

      ---

      • Re: V-caps - tubegarden 09:24:36 07/21/06 (3)
        In Reply to: V-caps posted by Goneill on July 17, 2006 at 16:41:58:

        Teflon Film Tin Foil 0.1uF V-caps arrived yesterday.

        I replaced the 0.22uf Obbligato Copper in the Ella output coupling.

        Still breaking in. Seem a good choice. YMMV ;)

        Happy Ears!
        Al

        
        
        

        ---

        • Re: V-caps - tubegarden 04:13:51 09/14/06 (2)
          In Reply to: Re: V-caps posted by tubegarden on July 21, 2006 at 09:24:36:

          Months have sung by. I now have a pair of V-H TFTN on one channel and a pair of Obbligato Copper on the other. Both are 0.1 uF. They seem to have settled in well. Next energy burst, I will try and find some way to describe the differences. Don't wait up ;)

          
          
          

          ---

          • Re: V-caps - Goneill 18:43:40 10/12/06 (1)
            In Reply to: Re: V-caps posted by tubegarden on September 14, 2006 at 04:13:51:

            Hi Al,

            Another month has gone by and I've only just noticed your update! Please do try and explain how they sound.

            Thanks,
            Graham
            
            
            

            ---

            • Re: V-caps - tubegarden 12:23:18 11/29/06 (0)
              In Reply to: Re: V-caps posted by Goneill on October 12, 2006 at 18:43:40:

              V-Caps sound like the speakers and microphones are several meters closer together, at any volume level :)

              Take that! Stereophile!

              Happy Ears!
              Al

              
              
              

              ---

Post a Followup: