Re: Winding BiTT with C shape winding tool

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Hi Doug & Ole, Thanks for researching that information on the Jensen for me.
 

 Even though I get the theory of this device, I struggle with the applying math.
 Magnetic circuits always confuses me with not only the units but their measurements too.
 

 It's not like we can pick up a multimeter and actually measure the true reluctance is or how much flux density there is. 
 

 In practice it's easy to see the Lenz flux cancellation works.
 Getting the efficiency up is the hard part...for me anyway.
 

 I don't quite understand how Jensen's feedback winding is implemented?
 He talks about 'the output winding'  being in series with the output coils ...there's only one feedback winding but two output coils?
 

 I have been trying the setup with MOV transformers cause they already have stacked E & I cores. 
 The extra turns required on the side legs seem to give excessive voltage sag when loaded.
 

 We need something which works at 50 or 60Hz to be practical approach not several hundred Hertz or more.
 So modifying  standard transformers might be key.
 

 Gerry