Here is some solid core wire i just picked up in the USA. This is the type of wire you guys need to look for, New old stock on a wooden bobbin Double silk wrapped 20 GAUGE solid core 1910-40s. The best dielectric you can use. The copper sounds better, this has been sitting around unused for 80 years and has matured. I use this old type of wire in the killerDacs and amps i make. Newer wire with its Teflon or some kind of plastic is rubbish. This was a great score, its hard to find like this, and will find its way into the killerdacs. Keep on the lookout for this stuff and put the links here