Low power Guanella 1:1 tuner balun using a pair of Fair-rite 2643625102 suppression sleeves

A reader of Low power Guanella 1:1 tuner balun using a pair of Jaycar LF1260 suppression sleeves asked whether there is an equivalent Fair-rite core for the project.

Fair-rite part 2643625102 (~$4 each from Element14) is of similar size and also medium µ, but slightly different characteristic to the LF1260.

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Above is a model prediction of the common mode impedance of a similar choke using the Fair-rite 2643625102 cores.

I have not constructed a balun using these cores, and it does have slightly different characteristics, but somewhat similar performance can be expected.

References