I've been restoring a Fuba UKA "Stereo 8" (one of two that I'd used for VHF DX back in the mid-'70s). The design incororates a 300/75 ohm balun - the photos show the antenna, the original assembly and my subsequent attempt at constructing a bifilar-wound balun of the same type.
I've always been a firm believer in maximising carrier-to-noise right at the start of the receiving chain - "once it's gone, it's gone"
Best wishes
Guy