[Amps] More parasitic choke questions

Jim Tonne tonne at comcast.net
Thu Jul 29 09:13:01 PDT 2010


I have been "lurking" on this parasitic suppressor
thing but now just have to say something.

>>>Assuming the 12 uH number is a parallel equivalent,
>>> converting that to  a series form results
>>>in 100 +j1.33 or 2.1 nH.

I want to point out that a good rule of thumb for
inductance of a piece of wire is   15  (fifteen)
nH per inch.

So that   2 nH   is less than a   quarter of an inch   of 
wire.

Boys and girls, that is totally insignificant!

>>>so high compared to the small inductance reactance
>>> of a typical suppressor that it can be  ignored.

Absolutely correct!

- Jim W4ENE





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