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Impednace vs frequency graph for offline common mode chokes.

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T

treez

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Pg 3 of the following shows impedance vs frequency graphs of power line common mode chokes.

https://www.mouser.com/ds/2/212/KEM_LF0022_SS11VL-372785.pdf
Many common mode choke datasheets don’t show these. We therefore need to get these graphs ourself.
The cheapest frequency analyser we can find is this £700 GSP-730 one….

GSP-730 spectrum analyser:
https://www.farnell.com/datasheets/...229.905673268.1555105354-711356958.1531003040

However, this goes up to 3GHz, and we only need it up to 30MHz.
Do you know of anything cheaper for our purposes? (Impedance vs frequency measurement and graphing for offline common mode chokes….)
 

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