![]() ![]() ![]() unlike the majority of Western Electric manufactured tubes, the 274b rectifier is grossly overrated and overpriced, you can find far better for less coin. One can invest in expensive nos tubes for the input or outputs and only hear minimal changes in tonal balance,bass drive, frequency extention etc when a weak, unbalanced or mediocre rectifier is employed in the circuit,and then wonder what all the fuss is about with nos tubes! Swap out the sovtek or weak rectifier for a strong nos one and be prepared for a whole higher order here. it should be the first logical place to start regarding tube rolling for voicing ones system, as they can have a major influence. If the amp or preamp employs a vacuum tube for rectification. rectifiers do make a difference and can have a major influence on the sound of the amplifier or preamplifier. ![]() While it may be difficult for some people to comprehend,like input tubes,driver tubes,and output tubes. This lag time will prevent cathode stripping of the other tubes in your amp. Does the airtight have a standby switch? Indirectly heated rectifiers vary in ramp up time in comparison to directly heated rectifiers. ![]() Chriskeating's post above is an appropriate one regarding ramp up time. ![]()
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