Cathode follower gain. The cathode follower has negative voltage gain: the output voltage is less than the input voltage. So this is where I'm looking for the benefit of experience: Would you spring for maybe a better suited follower tube? Or consider novel topologies? For example, I was thinking a MU Follower to help maximize gain. The price we pay for this is gain, which is slightly less than unity. It is the first triode to go into overdrive and its interaction with the upstream gain stage adds a unique overdrive effect that limits clipping of both the positive and negative signal lobes. Cathode follower has a voltage gain of slightly less than 1, a low output resistance of about 1 KOhm, a high output resistance of about MOhm, and is a non-inverting circuit. Input and output signals in cathode follower are in phase. A simple rule-of-thumb for figuring on a napkin is that the gain to each output of the long-tail will be about 1/2 the gain one would expect from the tube used as a typical common-cathode gain stage. The cathodes of both triodes suck free electrons from ground (through a resistor), which are then pulled to the plate (and through the resistor in the "normal" gain stage), then on to the + end of the filter cap. Feedback in Cathode Followers Think of a cathode follower like a grounded cathode amplifier in that the grid modulates conduction through the tube and load resistor. 1 we’ll get: The cathode follower is often used in this ‘buffer’ configuration specifically to provide low output impedance. zlyx etnb nmbqwdc jdjxufjn miuae gfzeut mapszwxou nyypi syne ofqonev