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more on transformer testing


TWANG

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orange and red to lamp

black and brown to battery

 

or reverse this

 

and you get a flash.

 

however, no combination will produce that flash if you connect to the yellow and white wires, and any two others.

 

since the instructions say, any two windings, can I assume then this OT is not performing correctly?

 

It's on the chassis, but not connected anywhere.

 

I'll do the PT now and see how that turns out.

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Your assumption is correct! Apparently the winding between the 8 and 16 ohm tap is still intact, but the portion of the winding from 0 to 8ohms fried. You may be able to use what's left by pretending the 8ohm tap is the new ground, but it may not be 8 ohms worth of impedance at the former 16ohm tap. It's been so long since I studied this stuff that I'm just not sure if it's a linear or logarithmic thing.

 

Gil...

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I bet that's the problem I had with that ground wire.. bad solder joint.. and then came loose when I was checking stuff.. which I didn't notice.

fair guess, anyway.. I'll start with replacing that OT.

After I test it that is~

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