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Wharfedale W60 crossover inductor soldering

Discussion in 'British Audio' started by ggizzy, Sep 17, 2018.

  1. ggizzy

    ggizzy Well-Known Member

    Messages:
    631
    Hello-

    I have a pair of these speakers which are in need of a bit of crossover restore. I had replaced the L-pads in both as they were beyond redemption. Both speakers were working but I had wanted to tweak the resistor values. While inside the cab, I thought that inductor looked like it might have had a cold solder joint. I tried to reflow the joint at 400, 450, and finally 500 briefly but to no avail. I am unable to get the lead from the inductor to solder to the tag on the outside!

    I have a pencil tip on my Weller station now but I have several other tips available. Is that the trick for this thick inductor wire? Even higher temp? was afraid of damaging the contact even though I have the heat clips on ther other side...any help is appreciated!
     

     

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  2. VanArn

    VanArn Member

    Messages:
    70
    Location:
    Melbourne,Australia.
    For some years the Wharfedale company supplied aluminium wire inductors in their crossover networks. There are specially formulated solders suitable to rework the joints but it may pay to have a unused spare solder tip set aside to use exclusively for aluminium soldering. Wharfedale used an ultrasonic tinning solder pot for this function. A remade aluminium solder joint should be sealed from the air to prevent oxidation.
     
  3. ggizzy

    ggizzy Well-Known Member

    Messages:
    631
    Thanks for the response. I have a few spare tips that I could use. Could you tell me what type of solder I will need to use and if I should use flux with it? Also is it something I could order from parts express or the like? Many thanks,

    Chris
     
  4. VanArn

    VanArn Member

    Messages:
    70
    Location:
    Melbourne,Australia.
    There are a number of products that can be obtained via Amazon or eBay. The main candidates are, the Harris Al Solder 500 kit , Kappaloy 9 al solder and Uniweld P4KD9 kit. I have used Multicore Alu-Sol 45DH but a reel of this speciality solder is on the expensive side for your repair project. The products mentioned either incorporate a core of flux within the solder or are supplied with a seperate paste flux.
     
    Last edited: Sep 20, 2018
  5. ggizzy

    ggizzy Well-Known Member

    Messages:
    631
    Thank you, they are on the expensive side but I likely don’t have a choice here... I will be ordering one of the above. Thanks for your time and help!
     
  6. transmaster

    transmaster AK Subscriber Subscriber

    Messages:
    8,183
    Location:
    Cheyenne, Wyoming
    W60 crossovers show up on frequently on eBay. Right now there is a set for a W60D, and a W60E

    W60D
    5CF1622B-7FD5-4988-9C02-52650B4297DE.jpeg
    EE8B9BD4-5FFC-443F-B7CC-FE3BCC317CED.jpeg
    2310E4AA-E04A-476F-BF55-ECCA588C2FBF.jpeg
     
    Last edited: Oct 13, 2018

     

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