Results 1 to 2 of 2

Thread: LB Correction AMP EzAudDac tuning

  1. #1
    Join Date
    Sep 2007
    Location
    Omaha, NE
    Posts
    769

    Default LB Correction AMP EzAudDac tuning

    I sent Andrew a message, but this is one of those situations where I actually have time to play with something, then I get #%^& stuck!
    I have one of the LB correction boards, but have NO documentation.
    I need to know how to tune it- i.e. it has 12 trimpots, and I don't know what they are/do. No way in hell I am hooking this up to anything until I find some docs.
    Anyway, here is what I sent Andrew- hopefully someone who is familiar with these things sees this message sometime this afternoon. Also, do you need a scope to tune this, or will a multimeter do?

    I am finally playing around with this today. I have the correction amp wired to the soundcard, driver installed, etc, but I have no idea how to tune the trimpots or what kind of target values I am looking for.
    I have googled like crazy, but there are so many threads on this topic I cannot weed thru them all- I still haven't found the info I am looking for after an hour or so of searching.
    I do not plan on using audio to drive this, I want to use the EzaudDac.dll.
    When I fired it up for the first time, I noticed 6.2vdc on pin 1 (x) of the correction board.
    Just for kicks, I tried this:
    I took some VB code that creates a test pattern and renamed Easylase.dll to EzaudDac.dll. I fired up the program, and it found the card.
    I ran the code and saw pin 1 begin to flutter around 5.7vdc, so it is doing "something".
    If you could point me to a manual link or a thread that discusses the tuning procedure I would appreciate it very much.
    Thanks, Mike


  2. #2
    Join Date
    Sep 2007
    Location
    Omaha, NE
    Posts
    769

    Default

    Don't you hate replying to your own posts?
    I got hold of Andrew and he steered me in the right direction. I'm tweaking trimpots to my heart's content now.
    Thanks DrLava!
    -Mike

    Edit- What do you know... we have signs of life! I just wish this had differential outputs, but you have to admit that the bang for the buck is unbeatable.
    Attached Thumbnails Attached Thumbnails tn_LBdac 001.jpg  

    tn_LBdac 002.jpg  

    tn_LBdac 003.jpg  

    tn_LBdac 004.jpg  

    Last edited by mikkojay; 09-04-2009 at 21:49. Reason: add pics


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •