12Au7 Cathode Follower Schematic. Web cathode follower with tube 12au7 (ecc82) schematic: It was designed only for a 12au7.
Web first, the cathode follower was not designed for a 12at7. I have been told that substituting my. Web as i looked at the schematic, i thought that a better choice for an output tube would be either a 6bl7 or 6bx7, as long as the headphone impedance was 300 ohms, as the 3.3k.
Web 12au7 (ecc82) cathode follower tube preamplifier schematic. It was designed only for a 12au7. Web cathode follower with tube 12au7 (ecc82) schematic:
The final value of rd at which i arrived is. Web click on schematic to see closeup. Web first, the cathode follower was not designed for a 12at7.
Web 12au7 tube preamplifier has been slightly modified so that i could use parts i had on hand. Web the 12a*7 tube family has a nice feature to easily inject filament bias voltage at pin 9 of the tube (because pin 9 is the center tap of the filament). Web a cathode follower is simply an ordiary gain stage that has been turned on its head.
Web as i looked at the schematic, i thought that a better choice for an output tube would be either a 6bl7 or 6bx7, as long as the headphone impedance was 300 ohms, as the 3.3k. Web here is the final schematic. The only reason i'd decided on the 12au7 is that i had indeed read the 12ax7 made a crappy.
Two stage 12au7 preamplifier with low impedance output stage. The overall gain is about 8 times. In this schematic all resistors are 1/2w except the 10kω cathode follower load resistor which should be 1w.
