Zs calculation

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Maboza-Ritchy

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• 19 Nov 2009

• #1

Hi
Got my 17th test to sit shortly but stuck with a zs calc. What answer do you get for the following.

Zs=Ze+(R1+R2)xMxL
Ze=1.2
(R1+R2)=30.2milliohm/M
M=1.2
L=25M

I get the answer of 36.906 ohms but this feels too high.
Any help with this will be appreciated.

 

flameport

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• 19 Nov 2009

• #2

2.106 ohms

Add the 1.2 after the multiplication, Ze is External, so cannot be affected by the circuit length.

 

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Maboza-Ritchy

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• 19 Nov 2009

• #3

FP
It seems so obvious now. Ze is fixed and not affected by M&L, I'm kicking myself for not twigging that's what I was doing wrong.

Cheers and thanks.