![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwbrmXVSsTz-bqQEtOzLpuEgh93IOHhwgHLFBS2sghunlwLkvNwGzYiU-pXpayexOu-L2t260D5M1qE1dAGFJCuYjfV_R_EInuASCLF_IAxZN5qNJBY8cQoc94wFNEfg3X7CKbCQYV8OM/s640/P1020596.JPG) |
I glued two toroids to make a binocular |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiMjP8YseF3kpClwfwr7F6H16zuRpMT2xsOKxqAgKFuw4ftf1vt-jW8kdhSCy0tAu_xy6npzwcnWMIHt3iQ3Oold5nPeYPB3MAfvfZcwCwXeg8lFrEnjMB675iNPLXSxGlMX8NyU2ssTvY/s320/P1020597.JPG) |
A different view of the cores. |
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9 turns make 98uh.
The twin toroid and two binocular cores. The cores come in a range of sizes. These are all the same material.
The twin core 1 turn gives 1uh.
The large binocular gives 1uh. same as the twin core.
The small binocular gives a little higher inductance.
I wound a 3 turn primary and a 9 turn secondary. The primary reads 4.8uh.
The secondary is 38uh.
So the choices are twin core or a dual aperture. I have wound the large binocular so I will try it next.
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