Replacing an Audio Transformer: EI-19 Output Specs and Replacement Guide

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To replace an EI-19 audio output transformer, it's crucial to understand its role in driving speakers, typically within an amplifier setup. The primary to secondary ratio and voltage ratings are essential for ensuring compatibility with the existing circuit. Audio transformers differ from standard step-up/down transformers as they are designed for specific frequency responses and load matching. Rebuilding the transformer may be an option if the specifications are unclear. Gathering detailed information about the amplifier's wattage and circuit design will aid in selecting the appropriate replacement.
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I need to replace an Audio transformer, EI-19 Output Transformer. What should I replace it with? I can't find the primary to secondary ratio, or the voltage ratings. Is there something special about audio transformers compared to step up/down transformers used in AC to DC converters? If so, what do I need to know to replace it?
 
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What type of equipment is this in? An audio output transformer just about always is driving a speaker. An amplifier? If so, how many watts?
 
Any chance you can rebuild it?
 
From Google it looks like a EI-19 audio transformer just specifies the bobbin or coil size. What else do you know about it, or the circuit in which it is being used?
 

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