Material for coil bobbins?

[Geaney]

Thanks chaps, I plan to make some rf coils for the (second) Radialva set I got for spares ages ago. I re-built the chassis mechanically but it needs re-wiring and the missing coils fabricated. One is about 3/8in dia the other more like 5/8in dia. Both bobbins are about 1in long.

I'll go hunting based on your suggestions.

Cheers, John