This handy calculator helps you pick a tube for your next upscale (or downscale) project. Choose the original kit tube, and optionally enter a length to be scaled along with the tube. You can also enter a desired scale amount to find tubes that match.
Body tube data taken from
by "OL JR" and
by Phill Ash.
The tubes listed as Loc/Precision are standard high-power sizes also offered by other manufacturers in phenolic and fiberglass.