An experimental 60 MHz amateur radio transmitter using a Lecher line tank circuit, built by radio amateur George W. Shuart, W2AMN, in 1934. During the 1930s VHF and UHF frequencies were the frontier in shortwave research. It was difficult to get ordinary vacuum tubes to work at such high frequencies because of electrode capacitance and inductance. This oscillator uses a triode vacuum tube with two coupled shorted Lecher lines (parallel transmission line stubs) attached to the grid and plate circuit to act as the resonator. The frequency could be changed by sliding the shorting bar up or down the line, as Mr. Shuart is doing.