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I have no clue, but perhaps this link will provide some clues...
Bounty: $6.00
Posted By: HelpIdentify
I'd Like to Know:
what this is and what it is used for, please provide a reference link
          Item History: none
        
        
        
          Size: 4 feet x 4-1/2"
        
        
        
          Markings: some on the circuit 
        
        
      
    
        
    Opinions
1)
    I have no clue, but perhaps this link will provide some clues...
References:
By: prokrypt Submitted on: 01/11/2022 at 02:43AM
    Accepted