Results 1 to 4 of 4

Thread: Voice coil resistance testing

  1. #1
    Senior Member Donald's Avatar
    Join Date
    Jan 2004
    Location
    Las Vegas, CA
    Posts
    524

    Voice coil resistance testing

    I plan to post a bunch of cone sets and plan to include a picture of the DC resistance reading.

    I have a L8RLE52 cone and canít get a steady reading. Just tried a D16R2420 and the same thing happens.

    I have alligator clip type probes so I am getting a good connection to the coil leads. I put a fresh battery into my Fluke 77. Just sitting on the table the reading changes from 5.7 to 6.3 ohms. I shorted the leads and the reading varied from 0 to .2 ohms. I am using Fluke test leads and Fluke probes.

    1. Is the DC resistance important to selling cones?
    2. Is this varying reading normal at low values?
    had L25,L36,L40,L120,L222,L300,AquariusIV(2),S1,4408
    have L65,L100,L222,DorianS12,B380

  2. #2
    Senior Member
    Join Date
    Apr 2003
    Location
    Richmond Hill, Ont.
    Posts
    4,682
    Quote Originally Posted by Donald View Post
    I plan to post a bunch of cone sets and plan to include a picture of the DC resistance reading.

    I have a L8RLE52 cone and canít get a steady reading. Just tried a D16R2420 and the same thing happens.

    I have alligator clip type probes so I am getting a good connection to the coil leads. I put a fresh battery into my Fluke 77. Just sitting on the table the reading changes from 5.7 to 6.3 ohms. I shorted the leads and the reading varied from 0 to .2 ohms. I am using Fluke test leads and Fluke probes.

    1. Is the DC resistance important to selling cones?
    2. Is this varying reading normal at low values?
    Yes, seeing/knowing the dcr is important to me ( though I'm not a potential buyer here ).

    The dcr reading should quickly stabilize ( under firm contact pressure ) and not vary by more than what the shorted leads indicated.

    I'd say either your meter is on the fritz or your measurement techniques are in doubt.

    Do you have a second meter that you could try out? ( second opinions are always useful )




  3. #3
    Senior Member grumpy's Avatar
    Join Date
    Oct 2003
    Location
    SoCal
    Posts
    5,338
    test value of a small value resistor... same issue?

    holding coil still, not near metal or magnets?

    if you test for voltage instead, do you see a small value bobbing about?

  4. #4
    Senior Member Donald's Avatar
    Join Date
    Jan 2004
    Location
    Las Vegas, CA
    Posts
    524
    Smallest resistor I could find was 10k. Fluke measured 10.03 and 10.04k. No name cheap meter measured 10.02 and 10.03k.
    had L25,L36,L40,L120,L222,L300,AquariusIV(2),S1,4408
    have L65,L100,L222,DorianS12,B380

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. jbl 2256 and jbl w15gti dc voice coil resistance vs. operating impedance
    By original jblguy in forum Lansing Product Technical Help
    Replies: 11
    Last Post: 06-23-2014, 02:32 PM
  2. Voice coil, Le.
    By Flemming Skov in forum Lansing Product Technical Help
    Replies: 0
    Last Post: 02-22-2006, 12:37 AM
  3. Voice coil
    By Flemming Skov in forum Lansing Product Technical Help
    Replies: 2
    Last Post: 12-10-2005, 07:48 AM
  4. What is AWG of voice coil ???
    By B&KMan in forum Lansing Product Technical Help
    Replies: 10
    Last Post: 05-10-2005, 10:31 AM
  5. 2420 voice coil DC resistance?
    By dougzilla in forum Lansing Product Technical Help
    Replies: 12
    Last Post: 05-08-2004, 09:45 PM

Posting Permissions

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