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Sunday, April 23, 2017

The 6 Channel Field Coil Supply

Hi!

Some photos of a field coil power supply which has been finished recently.




It is meant to supply a pair of speakers with 3 field coil drivers per side.




All in one chassis.




Completely passive choke filtered supplies, independent for each driver.




Voltages can be adjusted in 5% steps with a common set of switches per section (bass, midrange and tweeter). Digital meters monitor voltage and current of each of the 6 independent supplies.





Adjustment is done by selection of different primary and secondary taps on the power transformers to avoid any regulation circuitry.




LCLC filtering of each of the 6 voltages, so 12 chokes in total.




The finished unit weighs over 50kg!




Best regards

Thomas
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7 comments:

  1. IainApril 24, 2017 at 5:01 PM

    That is really cool!

    ReplyDelete
  2. AnonymousApril 27, 2017 at 9:42 PM

    or hot?
    There are no Kühlschlitze on top!!!

    ReplyDelete
  3. MultiblitzFebruary 9, 2018 at 9:26 AM

    How do you like the Wima MKP6 compared to the ASC x386 ?

    ReplyDelete
    Replies
    1. VinylSavorFebruary 9, 2018 at 9:47 AM

      The caps uses here are very different in capacitor values compared to the ASC i use so not really comparable in a meaningful way

      Delete
  4. Bob KApril 20, 2020 at 12:22 AM

    Hello. I'm need to thank you for such a wonderful website. What manufacturer makes the digital panel meters you are using for displaying the voltage and current? I'm constructing a power supply and would like to incorporate such meters.

    ReplyDelete

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