# Ferrite Rod Price Differences

We are trying to make a VLF geophysics device for our graduate project and we need two ferrite rod antennas (desired length is 6").

Searching on the internet, we have found two ferrite rod suppliers.

The first one:

Stormwise

2000u Monster Ferrite Rods

Length: 6 inch

Diameter: 0.845 inch

Price: $24 And the second one is a local supplier: Length: 3.93 inch Diameter: 0.314 inch Price:$1

We do not have experience and knowledge about antennas and their materials. The guy in the local supplier said that you can butt splice the coils to get 150 mm length and that diameter only affects the number of wire turns.

Is the advice accurate? Can you explain why the price is so different? Might it be due to the material quality or something else?