this website will help you figure out what those coils are
http://midnightscience.com/formulas-calculators.html
I made a coil for a regen using the single layer solonoid calculator for the antenna coil, and then estimating the number of turns for the tickler. Project is as yet incomplete but all the coils and parts are collected. You can use a frequency generator, a scope or vtvm, and a fixed resistance to measure reactance of the coil at a specific frequency, and then reverse calculate what the inductance is. Same deal for an unknown variable capacitor.
Regen control can be a resistor. Take a look at this, this guy's website inspired me to build my own regen. I am actually using a 6BF6, but a 30 will look more pretty. Read the "original text in pdf format" too.
http://www.bignick.net/Morgan_Radio/Radio_1.htm