Note
QST, Dec 1977 p. 102.
QST, Jan 1980, p. 100.
SST Electronics made a line of simple antenna tuners. The T-3 impedance transformer was designed to match the low impedances presented by mobile antennas. It covered 1–30 MHz, and its 12 coil taps spanned a range of 3 to 52 ohms. The T-3 was rated at 300 watts.