I worked up a model and started all the materials on a Hi-Fi audio system vacuum tube. Still working on a glowing version.
Instagram @glen.cordle
(http://live.staticflickr.com/65535/50084767443_2fe135e2be_k.jpg)
(http://live.staticflickr.com/65535/50085584872_05c05fea28_k.jpg)
reference photo
(http://i.imgur.com/HPUbQwF.jpg)
And for those who have no idea what you're looking at, this would be used in an amplifier like this
http://cdn.shopify.com/s/files/1/0888/2348/products/CS-100A-1_1024x1024.jpg?v=1583933412
This looks great, Glen! Really well done.