Válvulas 6l6, EL34, 6550, KT66, 12AX7

Valves 6l6, EL34, 6550, KT66, 12AX7
In this video I explain which are the valves of the best tube amps, such as Marshall Lead 100, Twin Reverb and Dual Showman.
Meet the American and English standard for 6l6, EL34, 6550, KT66, 12AX7, 12AT7, 12AU7, ECC83, ECC82 and ECC81 valves!