I found a site that sells a lot of used output transformers, mostly pulls from old tube radios. I'm looking for a 2.5K ohm primary to 8 ohm secondary but most of the transformers listed are spec'ed in ratios,for instance 16:1, 50:1, 100:1 etc...
Was hoping someone could point me to the math to do the ratio conversion. Also, I'm looking at single ended transformers, not push pull.
Was hoping someone could point me to the math to do the ratio conversion. Also, I'm looking at single ended transformers, not push pull.
What is hidden in there is transformers have ratios, not impedances. They may be optimized for some impedance, but your 2.5k to 8 transformer only has the 2.5k when 8 ohms is on the other end. Put 4 ohms, 3.2 ohms or 16 ohms out there and the primary is different. They have no idea what impedance load will be used, so they provide the turns ratios.
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