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Thread: 2435's on Ebay???

  1. #16
    Senior Member John W's Avatar
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    I got a reply:

    Min purchase is $100.00 on a Master Card or Visa. The APG S38n is $ 1.20 per ml.
    We do have this fluid in stock. You would need to order 84 ml.



    1000ul = 1ml right?

    I'm in for maybe a third of an order? Anyone else want to go in on this together?

  2. #17
    Administrator Robh3606's Avatar
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    Hello John

    You didn't tell them that it was for a speaker. You can purchase 'speaker kits" for $4 each with a $100 minumum or 25 kits and get them already dispensed into the proper recharge volume. I am ordering 25 kits. I need 10 and will Ebay or sell you guys the rest.

    Rob

  3. #18
    RIP 2011 Zilch's Avatar
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    Quote Originally Posted by John W View Post
    1000ul = 1ml right?
    Yes. The 84 ml is enough to do 840 charges. 100ul is just a couple of drops. I doubt I would ever use $10 worth.

    However it ultimately splits out, count me in.

  4. #19
    Senior Member John W's Avatar
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    Quote Originally Posted by Robh3606 View Post
    Hello John

    You didn't tell them that it was for a speaker. You can purchase 'speaker kits" for $4 each with a $100 minumum or 25 kits and get them already dispensed into the proper recharge volume. I am ordering 25 kits. I need 10 and will Ebay or sell you guys the rest.

    Rob
    Way to go Rob.
    I don't think I need it in bulk.

  5. #20
    Moderator hjames's Avatar
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    Did you see the clip on Rocketboom last year about the artist who was working with ferrofluid ... its early in the video show - may 10 -30 seconds in ... but shows a dynamic videoclip of moving ferrofluid:
    http://www.rocketboom.com/vlog/archi...06_jan_23.html

    The original video was on a Japanese site - the links changed, but there are some images here as well:

    http://www.kodama.hc.uec.ac.jp/protrudeflow/works/index.html
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  6. #21
    RIP 2011 Zilch's Avatar
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    Way COOL, Heather.

    Thank you for finding those!!

  7. #22
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    Quote Originally Posted by Robh3606 View Post
    Hello Nathan

    I have completely replaced the fluid in a pair and it's no big deal at all. All you need is a stiff absorbant paper and comes right out. It stays right in the gap. It would take a tech about 15 minutes to open the driver, wick it out and replace the ferrofluid.Then you reassemble and sweep. They would rather dump them than do this??? Then purchase new replacement drivers?? Well then again if they are replaced under warranty??? Hey man keep them coming!! I am certainly happy with mine.

    Rob

    Shhhhh-! I was trying to keep the market value low until I stock up!

    Seriously, that's cool. Wicking... I'll try that next time. It sure beats pouring it all over the place...not that I did that...I'm just saying...oh foget it!

  8. #23
    RIP 2011 Zilch's Avatar
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    http://audioheritage.org/vbulletin/s...3323#post63323

    eBay 2435s on PT-H1010, this filter:

    http://audioheritage.org/vbulletin/s...690#post146690

    M552 highpass @ 1 kHz.

    Expanded scale view, second.

    Conclusion: two, in particular, would likely benefit from cleaning and recharging with fresh ferrofluid. They play within +/- 1.5 dB of each other as purchased, however. #5 and #6 were refurbished by the factory over a year ago, #5 being down ~5 dB @ 1.8 kHz prior to doing that.
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  9. #24
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    I've updated the Technical Reference Section and included notes.

    2435H

  10. #25
    Administrator Robh3606's Avatar
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    The Ferro Fluid has been ordered and the packets will to be shipped tommorow with 3 bulk 10 ml containers to follow up in a couple of weeks. Would you believe they ran out of the stuff for another order.

    Rob

  11. #26
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    Quote Originally Posted by X_X View Post
    Shhhhh-! I was trying to keep the market value low until I stock up!

    Seriously, that's cool. Wicking... I'll try that next time. It sure beats pouring it all over the place...not that I did that...I'm just saying...oh foget it!
    We understand. You read about it somewhere.

  12. #27
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    I read the warning about a full charge vs the factory using 1/2 charge. Are the consequences known?

    What are the likely consequences of crossing this driver too low ( 500 - 600 ) at reasonable power and with a horn that will couple at those frequencies?

    (google spell check is a wonderful thing but I sure have learned to accidentally properly spell a lot of words I'd never heard of )

    I find the polarity puzzling. I thought that at a certain date all drivers that existed wound continue to move the cone out with + to black and anything created after that date would move the cone out with + red or with compression drivers is + pressure considered moving the cone in. No attempt at an argument here I was just surprised when I red the polarity but way down deep I think I may have heard something about compression drivers being different and being the origins of JBL's polarity marking system in the first place. I'm sure the answer is a lot simpler than my convoluted question. Thank you.

  13. #28
    RIP 2011 Zilch's Avatar
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    Here's six more eBay 2435HPLs, this time on PT-F1010, 'cause I sent my PT-H's to Heather for "evaluation."

    These are running on the "Gauntlet" filter, with M553 highpass @1 kHz.

    http://audioheritage.org/vbulletin/s...690#post146690

    Clearly #15 requires cleaning and ferrofluid recharge; it's behaving like the one I sent back to JBL for refurbishing. #11 would likely benefit too.

    SO, that's 2/16 (12.5%) = "Service required" so far, and 5/16 (31.25%) total "Service advised."

    Expanded (5 dB/division) vertical scale, bottom:
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  14. #29
    RIP 2011 Zilch's Avatar
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    And six more:

    Filter's a little different from previous runs, per request.

    2/6 apparently need reconditioning, so the rate remains ~33%.

    [Yes, "bright...." ]
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  15. #30
    Senior Member timc's Avatar
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    Hi.

    Does anyone still have some of this fluid i can buy? I need for 2 drivers.


    -Tim
    2213 + 2435HPL w/aquaplas + H9800 (Matsj edition)

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