Material for coil bobbins?

[Alan Douglas]

Any chance you know the inductance, or the number of turns, of those pies? I might have some ready-made chokes that could be adapted.

[Geaney]

Thanks Alan, funnily enough I had a rummage this morning and found some old IF tfo from an PYE I scrapped ages ago. They're not quite the same (have slugs, etc.) and the measured resistance is different.

I will remove the ones from the restored set and measure as much as I can. All I did when I was working on it was measure resistance to see how the coils were laid out on the bobbin, etc. Once I remove them I'll check physical dimensions, wire dia. inductance, etc.

Cheers, John

[Alan Douglas]

Inductance is easy for me to measure, so I could rummage through the boxes looking for pie-wound coils of the right inductance and general appearance.