Do the tubes wear out more quickly if they are left in standby mode?
In standby mode, only the filaments remain activated to keep the tubes heated. Tubes last longer if they are already hot before the main power supply is applied. The main power switch in a preamp, CD player, or DAC should be turned off when the equipment is not in use for more than one week. Power amps should not be left in standby mode since they wear out at a greater rate than preamp tubes while in operation. Standby in a power amp should be used for approximately five minutes before use. 5. What is the benefit of matching tubes? Four reasons to match power tubes are: one, to increase tube life; two, to lower harmonic distortion; three, to reduce hum; and four, to preserve the life of the output transformer. Matching preamp tubes provides equal gain in both channels. As well, noisy, microphonic, and dead tubes can be rejected at the same time that matching and burn-in is performed. 6. Can the 6N1P be used as a substitute for the 6922? Tube substitutions that can be used for the 6922
