Many years ago I bought a bulk lot of these red slug tuned inductors off ebay. They present an inductance of less than one uH, so they were probably used somewhere in a VHF radio.
As an experiment, I cut off the windings, and wrapped my own 28 awg winding on it. I was hoping to create a variable inductor in the 3.7 uH range for an Epiphyte 2 radio that I’m collecting parts for.
I would about 30 turns on it, and tested the start to end inductance range while moving the slug. With 30 turns, I can get 3 uH to about 7 uH. The pigtails can be wrapped around the legs and soldered.
I tested the Q using a 100pf capacitor, and came up with a value of 205.
