@Kestrel4 Thanks, Terziyski, I guess the distributor of the AC/DC converter had just got the specs wrong. The inner looks smaller than 2.1mm but I have just ordered that as a replacement

What are the dimensions of the DC connector to the AX10? I bought an extension cable with a 5.5mm X 2.5mm plug but the inner dimension appears to be too big. I bought it because the only place I...