Hi Andy If you do get a 0 to 1000pF or even 0 to 2000pF you may find it difficult to tune! Estimate the range of capacity you want for your coil and frequenccy required and you will probably find yu want say 1400 to 1650pF .....then 1350pF of silver micas and a 350pF variable in parallel would be far easier to tune. Good lucck with it Alan G3NYK