Let's say you've got a salvaged output transformer. You know that it was used with a pair of 6L6's, or whatever, so the primary impedance is not a pressing issue. And there's no way to find the original schematic or any data on the transformer. Is there a way to ascertain its secondary impedance?
Denver, CO. 80022
You'll have better results searching for the opposite, determining the primary impedance. If you know this OT was used with a pair of 6L6, you can figure the primary impedance was about 4K, from there with the test methods described, you can figure out the secondary impedances.
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