This was a quick test to resolve a long running conversation about the Guanella balun at out weekly SEKARC coffees. The test setup is a signal generator feeding the balun under test a 220 ohm resistor and an HP 100MHz oscilloscope. The test showed that my 10 min balun build did work at frequencies above 6 MHz which is to be expected on a type 61 core.

Thanks for watching.

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