Inquired, "I am going to a swap this weekend. I will be looking for some wire to wind the plate choke in my new project. What should I use?" (etc.) Modern #24 "enameled" is fine. Most are rated at least 1 kV or better, so if you multiply the total turns on your solenoid choke by 2 kV (side-by-side, double insulation) you'll see it's rated very conservatively. 73, Roy K6XK/0