im in process of building this ESR meter : http://ludens.cl/Electron/esr/esr.html
i have some questions about the transformer. it is a 400:20 ratio. he specifies that he is using a EA-77-188 core. i attached a pic of the cores that i have available in my parts bins. the smallest wire i have in my arsenal is 22 guage with plastic insulation. is the core type critical? could i use one in the pic? as far as turn ratio could i do something smaller like 200:10 or even 40:2 so i can fit my wire on the core ??
thank you!
i have some questions about the transformer. it is a 400:20 ratio. he specifies that he is using a EA-77-188 core. i attached a pic of the cores that i have available in my parts bins. the smallest wire i have in my arsenal is 22 guage with plastic insulation. is the core type critical? could i use one in the pic? as far as turn ratio could i do something smaller like 200:10 or even 40:2 so i can fit my wire on the core ??
thank you!
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