Original poster: "Gerry Reynolds" <gerryreynolds@xxxxxxxxxxxxx> For the 1000 to 1200 turn secondary, what is the prefered aspect ratio. Do you still shoot for around 4.5:1 ratio. I can see if one populates this form with a thicker wire and hence reduce the number of turns, the Q would go up and maybe some I^2R loses go down. It seems this would come at the expense of the secondary inductance. Gerry R
Gerry, A pig coil builder might also use a wider aspect ratio and thereby maintain inductance despite using fewer turns of thicker wire. An NST coiler may want to keep the system compact and therefore choose a narrower aspect ratio.John