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For info/Decca coil mods.

54 uH coil using powdered iron core (T200 - TYPE) resistance 0.4 ohms using 18 mm enamelled

copper wire, single layer.

54 uH coil using original decca paxolin former and original litz wire 0.5 ohms.

The iron core has a slight advantage plus only a fraction of the physical size.

Using a ferrite core, would require less turns to achieve the 54 uH value, heavier wire could be used with resistance advantages.

The cores that I used are Genalex G1T 26R817 original Decca, out of the phase loop transformer assembly unit, about the same size as a T200.

de G3KEV