The Burhans papers are on vertical whips. They are really noisy for HF.
But the list of papers is impressive.


wrote:
wrote:
I'm thinking it would be fun to get some wire, a capacitor and a jumbo
sized ferrite rod to make a good ferrite loop antenna. Does anyone know
where you can buy oversized ferrite rods (say, ten inches or more in
length) without spending an arm and a leg?

Steve
++++++++++++++++++
For some ideas that work look up:
Burhans, RW; "VLF active antennas," Radio Electronics, pp. 63-66,
February 1983.(pdf)
Burhans, RW; "VLF active antennas-part 2," Radio Electronics, pp.
65-72, March 1983.(pdf)
at http://www.rsl.ku.edu/~eecs501/active_antennas/

His unusual "split/counter" wound ferrite loop works very well.
Smaller Ferrite rods will work at higher freqs.

Email listed is no longer valid.
Terry