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Got it from a discussion with Steve Hunt G3TXQ on baluns on another forum - the guy who is often quoted on this website when it comes to baluns, chokes etc. He provided the figures.

Basically if you short out to ground the hot side of the floating load (floating in respect to ground) it puts the common mode choking impedance in parallel with the 50 Ohm load. This will alter the SWR detected by the analyser. The higher the choking impedance (good) , the less it alters the SWR. The lower the choking impedance (not good) the more it alters the SWR.

[QUOTE="M0GVZ, post: 365320, member: 22312"] Got it from a discussion with [URL="http://karinya.net/g3txq/chokes/"]Steve Hunt G3TXQ [/URL]on baluns on another forum - the guy who is often quoted on this website when it comes to baluns, chokes etc. He provided the figures. Basically if you short out to ground the hot side of the floating load (floating in respect to ground) it puts the common mode choking impedance in parallel with the 50 Ohm load. This will alter the SWR detected by the analyser. The higher the choking impedance (good) , the less it alters the SWR. The lower the choking impedance (not good) the more it alters the SWR. [/QUOTE]

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