[Antennas] New OCF Dipole

Wed Mar 12 21:01:13 EST 2008

Charles Greene wrote:
> Bill
>> I don't think a t200-2 has eno[ugh permeability for a balun on 80 
> meters, That might be your prob. My Ocf is > 2:1 across the 80 
> meter band using those dimensions. Try a 4:1 balun using a f140-43 
> core, of better yet, two.
>> Chas W1CG
The mix 43 ferrite is lossy and will not work as efficient for a voltage 
balun as the powdered iron T-200. I would be very skeptical of such a 
broad low SWR across the 80-meter band.
You may find this paper valuable regarding choice of ferrite balun/choke 
core materials.
http://audiosystemsgroup.com/RFI-Ham.pdf
73,
Danny, K6MHE