[Ronja] Measuring capacitance of inductors with Twister

[Karel Kulhavy]

---- "Gyurkó Martin" <asteri_x at freemail.hu> schrieb:
> Careful!

1x usually is a normal koax cable
10x is something weird with the capacitance, and it is not so easy to 
say, especially when you adjust the probe with it's trimmer.
I would guess it is the input cap.

> Direct using of 50 Ohm cable?
> would it destroy the measurement results?

I have upgraded the measurement. Used 93 Ohm cable terminated with 91 Ohm terminator
into 1MOhm 13pF input of a 350 MHz Tektronix digital scope. In series with this is
a 30kOhm resistor and the coil is between the resistor and output of a HC gate (Twister 60-13). It works fine and gives the capacitance directly without subtracting any probe capacitance (there is no probe) :)

Karel
> Martin