Anyone know what the effective angle of Voyagers transmitter is? The centre of the signal was something like 69 million KM off to the side of earth. 20% of of

Anyone know what the effective angle of Voyagers transmitter is? The centre of the signal was something like 69 million KM off to the side of earth. 20% of of earths orbital diameter. I suppose the difference is the effective receive angle, and by turning up the power they could get it to respond.