Original poster: "KN4AB by way of Terry Fritz <twftesla-at-uswest-dot-net>" <kn4ab-at-home-dot-com> I am an neophyte looking to build a vacuum tube coil using either a 6146 ( which I have several of) or an 811A. I have a schematic diagram downloaded from the net, but need a little more help on the physical construction. Can anyone direct me to a good source. Thanks, George' KN4AB