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Electronic Theatre Controls Inc

Will a Magnetic Transformer work with my Unison Foundry Phase Adaptive Dimmer


The information in this post is provided to assist in troubleshooting. Perform work at your own risk. ENSURE ANY POWER FROM DEVICES HAS BEEN DISCONNECTED BEFORE SERVICING ANY EQUIPMENT. If you do not feel comfortable performing the work, please contact us or your local service center. Be aware that ETC and its Affiliates are not responsible for any damage or injury caused by service of our products by anyone other than us or our authorized service providers, and such damage is excluded from the product’s warranty.


Can I use the Phase Adaptive Dimmer or Sensor Phase Adept Module with a magnetic/inductive ballast/transformer/load?

Description/Explanation of Issue

ETC does not recommend the use of this dimmer with a magnetic or inductive load. Please see below for options.


  1. For the Phase Adaptive Dimmer, ETC now offers a version of this product for these loads.  This product is the Echo (or Foundry) Forward Phase Dimmer. It is designed specifically with this load type in mind and should be the product used.  
  2. For the ETC Sensor rack applications, a standard D20 module is the best product for these load types. If this is for a retrofit option, one solution would be to use a CC20 (constant current) module and install a Foundry Forward Phase dimmer between the module and the load.



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