[RFI] Experience with RF-INQUIRY Hi-Q Chokes?

[Tom Rauch]

> just came across an advertisement of a common-mode choke produced by
> RF-inquiry of Japan. They claim to provide at least 50 dB of reduction of
> common-mode-currents.

By the way, if the common mode source and load impedances are a fraction of
an ohm it is easy to obtain -50dB. If the common mode source and load
impedances (which have nothing much to do with line impedance) are 1000
ohms, we would be lucky to see 10dB.

It depends on how they measured.

73 Tom