[Lowfer] Ferrite rod winding

[F W Mooney]

I have a QUANTUM LOOP antenna for which I'm making additional rotatable =
heads (already mad a couple).  The rotating heads are just ferrite rods, =
wound for different medium- and long-wave bands.

I noticed the original QUANTUM LOOP head for medium wave was made with =
quite a bit of air between the windings and the ferrite rod.  The =
windings were wrapped around a piece of PVC, and the rod thru the center =
of the PVC was further isolated from it by several windings of electical =
tape around the ferrite rod. =20

Looking for advice.  I'm winding new coils.  Should I put the windings =
right on the ferrite rods, or put some air between the coils and the =
windings?

Thanks.

- Fred M.  KA1DGL