I have a question about OCF dipoles; it refers to the choice of the
type of balun transformer (voltage or current) to be used with that
type of antenna:

Since an OCF has by nature an asymmetrical distribution of currents in
its two legs, the use of a current balun seems a kind of 'brute
force' imposing a symmetrization of the currents in the legs.

For the transformation of impedances, would it be more appropriate to
use a voltage balun instead?

73 de Pierre VE2PID