Which tubes are suitable for amateur radio and CB radio as replacements or for a robust power amplifier configuration?

In amateur radio and CB radio, robust transmitting tubes matched to the specific equipment are especially important. Typical examples are 811A and 572B in classic linear shortwave amplifiers such as the Ameritron AL-811 or AL-572, 3-500Z in powerful HF linear amplifiers, 6146B in transceivers such as the Yaesu FT-101ZD, 4CX250B in amplifiers like the Dentron MLA-2500 and QQE06/40 in 2 m HF stages. EL509 and EL519 are also used, especially in older or modified linears. In such amplifiers, technically suitable tubes are essential.