Tube rectifiers convert AC to DC and is used in the power supply of an amplifier. The 12at7 tubes are signal tubes in your preamp.
relationship between rec. and the other tubes?
New to tubes, in my pre I have (1) 5z4p rec tube and (2) 12at7 tubes. What is the relationship between them? When I change diff. Brand 12at7's it affects the low and high and mids. Not sure what the rec. Tube does? Tyring to get a handle on this. Any help is appreated! Thanks.