Design · Experiment · Listen · Enjoy
In my experiments, I have observed a strange pentode phenomenon that can have a significant impact on audio design, regardless if the pentode in question is an output tube or merely an input tube. I actually observed this effect when building a tube AM radio. With certain values of plate resistors — which value varies … More A Peculiar Pentode Phenomenon
So if you are not using a standby switch, what other alternatives do you have? Solid-State Timer One alternative, now becoming popular, is the use of a user-friendly, solid-state timer-driven relay. Aside from the complexity of the solid-state part of the timer and the low-voltage DC power supply need, however, the relay in question would … More Alternatives to Standby Switches
In the tube amplifier world, there has been quite the debate over whether a standby switch is needed. The standby switch’s job is to keep the high voltage off of the plates of the power tubes in an amplifier until the tubes are warmed up to prevent a phenomenon known as “cathode stripping” from occurring. … More Standby Switch?