15-240PF 2000V Single-unit Air Dielectric Variable Capacitor
https://www.ebay.com/itm/254836361298
99.9% Copper Tube 1/2" OD x 7/16" ID 10 Ft, Tube Wall: 1/32"
https://www.amazon.com/
https://www.qrz.com/db/VE3DAL