The connector size is a 1.7 x 4 mm DC plug.
I normally save them from universal DC power packs that come
with a range of plugin DC right-angle adaptors.
I then solder the power lead to the pins and apply heat shrink
tubing over the soldered pins and then over the whole join area.
When plugged in I clamp the DC lead under a saddle screwed down
by the earth screw.
That is one of the problems (there are others in my opinion)
with the Powerpole adaptor. The suggestion by Richard at
Sotabeams when I saw him at the Newark Hamfest last September
was to cut the plug off the charger and fit Powerpoles "because
that's what everyone does" was unacceptable to me. Sockets to
make an adaptor are available from an Amazon seller but quite
difficult to find because of their unusual size. I couldn't find
any on eBay at the time.
