condor wrote:
I will made a dipole for 10.1 Mhz v inverted , with total lenght 15 mtrs.
What is the appropriate balun ? 1:1 1:2 1:5 or others ? tnx

The feedpoint impedance of a 15m dipole at 10.1MHz will be reasonably
close to 50 ohms, so you want a 1:1 balun.
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com