I have resonant antennas for 40m, 20m, 17m, 15m, 12m and 10m but nothing for 30m or 80m. I'd also like to operate on those two band using my EGV-9B CW QRP radio and my 40m dipole. I needed to build an ATU that is small, compact,efficient and versatile. My research indicated that a T match would best fit the bill. This video describes how I went about building one.