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I'm in the process of rebuilding a "Z" transformer.  It appears to have some sort of resistor (I think it is Q-% or Q-6, going from the circuit breaker to the light indicating the breaker tripped.  This resistor is damaged.  I haven't been able to find a new one on-line. 

Does anyone know where I might find one or if there is an equivalent replacement?  I'm not an electrical expert so I can't even figure out why a resistor would be needed just going from the circuit breaker to the light bulb.  I'd love to understand why it is there.

Besides changing the power cord, I decided to also replace the rollers since at least two of them seemed worn.  I have to say what a nightmare it is rebuilding this transformer.  I've rebuilt several ZW transformers by replacing the power cord, rollers, circuit breaker, and whistle diode.  That repair is a breeze compared to the almost total disassembly required to repair the Z.

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