Quantity   Component name
1 × 8mm diameter copper pipe Sold as "small bore" central heating pipe in DIY stores
1 × 200 pF variable capacitor small variable capacitor for matching the feed to the loop.
1 × 10pF - 120pF vacuum variable capacitor The expensive option for tuning the loop (unless you get it for a tenner at a junk sale like I did)
1 × 2 section 250pF air gap variable capacitor Another (cheaper) option for tuning.
2 × copper laminated sheets, 100mm x 150mm For the 40m add on capacitor
2 × PL 259 connector
3 × SO 239 socket Connectors and Accessories / RF and Coaxial Connectors