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T-pad Calculator Question

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V2:
I thank you for your excellent web resource (Ouch!). I wonder, regarding the T-pad values, you say:

In "Input impedance of attenuator" type 100000
In "Output impedance of attenuator" type 100000
In "Attenuation required in decibels (1-40):" type 20"

Since the Sweet Whispers is 100K, but the assembly portion, exclusive of the resistor in series, is really 10K, Wouldn't I use 10K for the Input impedence of the attentuator? That way I wouldn't have another resistor (-- the SW resistor) in series with the new resistors in the the T-pad.

I don't get it...



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