Results 1 to 4 of 4

Thread: Altec 9440A power amp BIAS set help

  1. #1
    Hostboard Member MerlinVSM's Avatar
    Join Date
    May 31st, 2012
    Posts
    45
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Altec 9440A power amp BIAS set help

    I have replaced the most of the electrolytic caps in the amp and I am not sure how to set the bias. The manual
    "insert a clamp-on dc milimeter over BLUE-wire from terminal E21 of channel 1 output circuit board and set bias adjustment pot R22 to 75+-5mA".

    How to interpretate to "insert over BLUE-wire" ? Where to connect the to dc millimeters cables?

    The BLUE-wire run from output circuit board terminal E22 to 9800uF/100V power capacitor.

    Is it just to connect the milliamperemeter at E22 on the output board and at the power capacitor screw terminal ?

    Thanks for help

  2. #2
    Senior Hostboard Member gvasale's Avatar
    Join Date
    October 13th, 2005
    Location
    Webster, Ma
    Posts
    215
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Re: Altec 9440A power amp BIAS set help

    What they're trying to tell you is that by using a clamp on meter you dont have to unsolder the connections to insert the old time ammeter in series with the point to point wiring.

    This You Tube clip may help you understand: How-To use a clamp-on ammeter - YouTube

    Hope this helps...

  3. #3
    Hostboard Member MerlinVSM's Avatar
    Join Date
    May 31st, 2012
    Posts
    45
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Re: Altec 9440A power amp BIAS set help

    Thanks for help.

    BR
    Lars

  4. #4
    Senior Hostboard Member tomt's Avatar
    Join Date
    March 7th, 2003
    Posts
    5,477
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    3 Post(s)

    Re: Altec 9440A power amp BIAS set help

    this one?



    guns kill people,

    like spoons made rush limbaugh,

    fat ....

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
This forum has been viewed: 24589437 times.