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Can anybody suggest a Iron Powder Core to use as input filter choke between car 12V battery and center tap of push pull transformer dc to dc inverter with 22khz and maximum of 8A current flow. Preferably available to Farnell and RS. I can't find NEOSID 17-732-22 ring core. a 14.8X8X6.35mm...

Hi, Can someone recommend a good quality USB Oscilloscope with price range of US$200 TO US$300. I'm replacing my old Leader 12mhz 1021 Analog Oscilloscope. Planning to use it mostly on repair of PWM Power Supply, Digital Circuits. probably capable of handling 300V DC. Is it possible that USB...