130

The Tektronix Type 130 is a self-contained instrument that measures inductance and capacitance. The 130 makes an LC oscillator using the device under test and a capacitor or inductor internal to the 130. That oscillator's frequency is measured by mixing it down using a fixed reference frequency, generating a pulse at each zero-crossing, and integrating (low-pass filtering) the pulse train. This produces a voltage that is proportional to the frequency difference between the LC oscillator and the reference oscillator. This voltage is displayed on a d'Arsonval (moving coil) meter on the front panel of the 130.

The Type 130 was designed by Cliff Moulton.

Key Specifications

Ranges	3, 10, 30, 100 or 300 pF / 3, 10, 30, 100 or 300 μH full scale
Accuracy	3% FS, 1% FS with "careful" calibration using S-30 Delta Standard
Measurement voltage	<1 V for capacitors, <0.25 V for inductors, 120-140 kHz
Guard output	250 Ω source impedance, can drive 200 pF
DUT connection	UHF connector (DUT) + 4 mm jack (guard)