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Reconing Guide - Pics

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CHAMPION View Drop Down
Old Croc
Old Croc


Joined: 30 September 2004
Location: United Kingdom
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    Posted: 05 April 2010 at 7:14pm
Theres been afew times when ppl have asked, how to recone drivers & Diaphragms.
 
Heres somthing to go on...Roger.m should put somthing like this up on the main Speakerplans page!
 
Drivers

Supplies and Tools Required:

Compressed Air
Soldering Iron
Solder
Sharp utility knife
Masking Tape
Double sided tape
Sharp scraping tool or Chisel
Two Component Epoxy or Rubber Type glue
Plastic Shims
Small weigh
 
 
 
Diaphragms

Supplies and Tools Required:

- Screw driver

- Masking Tape

- Compressed air source

    Step 1: Loosen the screws, remove the cap of the driver, holding the membrane firmly in place by the terminals.

    • reconin
    • reconin

    Step 2: Blow the entire area where the membrane sits, delicately with compressed air, in order to eliminate any metallic dust or fine grit

    Step 3: Remove the defective membrane; pay attention that there is NOT a plastic shim between the diaphragm and the plate. If there is a shim, it is very important that this same shim be re-used when you replace the new membrane

    • reconin
    • reconin

    Step 4: Visually inspect the gap and make sure it is clean: if not, use a piece of masking tape to carefully clean all particles from the gap. This step is extremely important. The gap must be 100% free of any and all foreign matter

    • reconin

    Step 5: Place the new membrane in its center using the same shim you removed in step 3, when you disassembled the driver

    • reconin
    • reconin

    Step 6: Re-position the rear cap and tighten the screws

    It is advisable, at this point, to do an acoustic test, to verify that you have installed the diaphragm properly:

    Hook up the driver to an oscillator and an amplifier.
    Conduct a sweep test from 200 Hz to 1000 Hz, applying 3 – 4 V rms. During the test you should not hear any noise or strange vibration; instead, you should hear a "clean" sweep sound. If not, it is possible that some particles of foreign matter were left in the gap. In that case return to step 4, and repeat the operation.

     
     
     


    Edited by CHAMPION - 05 April 2010 at 10:12pm
    Sticks n Stones
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    madboffin View Drop Down
    Young Croc
    Young Croc


    Joined: 03 July 2009
    Location: Milton Keynes
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    Points: 1314
    Post Options Post Options   Thanks (0) Thanks(0)   Quote madboffin Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2010 at 9:33pm
    Originally posted by CHAMPION CHAMPION wrote:


    Supplies and Tools Required:

    .......

    - Compressed air source

    ...... 


    I would advise against using compressed air. You can end up blowing debris right into the magnet assembly, from where it's very hard to remove. You can also spray a lot of moisture in there unless you have a very dry air supply as required for painting.

    Get a vacuum cleaner with a hose (a Henry will do, a Dyson is better) and some heatshrink tubing that will fit over the end.  Clean the end of the hose with some silicone oil or polish to make it reasonably non-stick. Heatshrink over the end to provide a couple of inches of extension, then several more pieces over each other to make a good rigid reducer. Three or four layers will do, depending on thickness. Don't run the vacuum until the shrink has fully cooled and is nice and solid.

    You now have an excellent suction tool for cleaning the worst bits out the gap prior to using masking tape to finish the job.

    The reducer should pull off the hose easily enough when you have finished (just don't use the adhesive lined stuff...) and can be kept with the scrapers, tape, etc ready for the next recone job.

    and another thing:
    Cut out and and keep scrap titanuim diaphragms. If you cut them into quarters they make excellent scrapers for cleaning rusty gaps.


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    smithers View Drop Down
    Young Croc
    Young Croc


    Joined: 12 June 2006
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    Post Options Post Options   Thanks (0) Thanks(0)   Quote smithers Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2010 at 10:03pm
    100 points and a smiley face sticker to anyone who uploads a guide on how to recone Dual suspension drivers like PD/Void/FANE...all the guides i've ever found online are for single suspension drivers like EV and B&C.
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    CHAMPION View Drop Down
    Old Croc
    Old Croc


    Joined: 30 September 2004
    Location: United Kingdom
    Status: Offline
    Points: 3660
    Post Options Post Options   Thanks (0) Thanks(0)   Quote CHAMPION Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2010 at 10:14pm
    i will see what i can do..i hav a stack of dual suspension driver to recone
    Sticks n Stones
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