Hi Peter
I notice from the circuit for this set that there are 2 places you can connect the aerial.
One aerial socket goes to the top end of the medium (short) wave coil and one to a tapping on that same coil.
If you connect to the latter socket the capacitance presented to the set by the aerial will have a smaller effect on the tuned circuit and allow you to tune slightly further up the band.
Just how much difference this will make in practise is outside my experience, but it's worth a try.
