K&K Audio / Lundahl Transformers

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K&K Audio / Lundahl Transformers

Never mind the hole for the connectors!

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Bas Horneman

(A)

In Reply to: Re: I hate stainless steel... posted by KevinC on September 08, 2004 at 13:25:56:

do you know how hard it was to drill all those ventilation holes!!! ;-)
Cheers,
Bas
To infinity and beyond!!!

Follow Ups:

Bas, you are always a hoot! Nice job! And... - AnandR 17:51:19 09/08/04 (8)
how does it sound? Compared to your DDDAC 2000 especially...
Anand.
- Hi Anand, it's too early to tell... - Bas Horneman 01:22:12 09/09/04 (7)
  I just rigged it up last night...to see if it worked...and listened to a track or 2.
  Out of the box though, it sounded a little more forward than the DDDAC143.
  I'll keep you all up to date with my listening impressions...
  Cheers,
  Bas
  
  To infinity and beyond!!!
  - Re: Hi Anand, it's too early to tell... - Dave Davenport 05:02:33 09/09/04 (6)
    Hi Bas,
    Remember to break it in before serious evaluation. See the recent posts on this forum.
    Dave
    - Will do Dave, But how can I - Bas Horneman 05:28:09 09/09/04 (5)
      "BURN" them with 5-30v, now that they are allready soldered in place....
      Cheers,
      Bas
      
      To infinity and beyond!!!
      - Re: Will do Dave, But how can I - Dave Davenport 08:19:22 09/09/04 (4)
        
        In Reply to: Will do Dave, But how can I posted by Bas Horneman on September 09, 2004 at 05:28:09:
        
        Hi Bas,
        Just use the regular CD signal, it will take a little longer but it works fine.
        Dave
        
        Re: Will do Dave, But how can I - AnandR 09:52:21 09/09/04 (3)
        
        In Reply to: Re: Will do Dave, But how can I posted by Dave Davenport on September 09, 2004 at 08:19:22:
        
        Dave,
        Why not solder in 6K resistors instead of 3K and burn it in for 200 hours and then switch back to 3K or whatever (1.5K in my case since I only need 1 V rms output). That way you can burn it in with 4V rms (or close to it).
        Is that what you mean? What is the maximum resistance/voltage you recommend on the output of the passive RAKK dac option to break it in? You could use a cheap resistor and then switch back to the Mills when all is done.
        Anand.
        
        Re: Will do Dave, But how can I - Dave Davenport 12:47:57 09/09/04 (2)
        
        In Reply to: Re: Will do Dave, But how can I posted by AnandR on September 09, 2004 at 09:52:21:
        
        Hi Anand,
        That is an interesting idea. I haven't given it any thought until now and I am not sure that the resistance on the secondary makes much if any difference here. The reason is that the current will be the same in all cases and the current is internal in the transformer while the current to voltage conversion is in the external resistor.
        To speed up the process you would have to increase the internal current by increasing the input signal.
        At least that is my current thinking and the floor is open for comments.
        Dave
        
        Ah... - AnandR 17:18:01 09/09/04 (1)
        
        In Reply to: Re: Will do Dave, But how can I posted by Dave Davenport on September 09, 2004 at 12:47:57:
        
        you are correct. The current to voltage conversion is through the resistor, so any increased voltage will only be after the transformer.
        Lateral thinking just set in. Thanks.
        So if we can increase the signal ahead of the transformer (ie. after digital to analog conversion), that would be one way. Or else we'll just have to wait for 250 hours.
        Best,
        Anand.
        
        Re: Ah... - Dave Davenport 21:02:41 09/09/04 (0)
        
        In Reply to: Ah... posted by AnandR on September 09, 2004 at 17:18:01:
        
        Hi Anand,
        Yes, I'm afraid that is correct.
        Dave

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