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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

5 comments:

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

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

    ReplyDelete
    Replies
    1. 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