12ax7 Direct Coupled Cathode Follower, For the following example we will design a cathode follower to act as a buffer for an effects loop. The 12AX7 is especially suited for use in re- sistance-coupled voltage amplifiers, phase i'd like to make sense of what i'm lookin at, and why the voltage measurements from the cf grid and cathode to ground, respectively, do not match up with the voltage measurement directly This is a DC coupled cathode follower, taken from this page and in context of the page, its how the 5F6-A Bassman drove the tone stack. A Cathode follower is often connected directly to the output of Don't forget that an output coupling capacitor will be needed to block the cathode voltage from watever we happen to be plugging the cathode follower into. The signal on the cathode drives the second triode which is non If you are Direct coupling the Cathode follower to the output grid, the bias is set at the grid of the Cathode follower, and you "need" a negative supply in order to bias correctly and have a As far as cathode follower specific tubes go, doesn't matter if it's high gain or low gain. Follow up from the Dual-Triode 12AX7 Test Harness This was the other frequently used circuit used in many tube amps. I'm fairly new to (tube) amp design, but did a lot of reading learned a lot on this forum. Fixed This used 16 mu followers just like this one for channels, mix amps and VU buffers plus as couple of ECC99 SRPPs for a simple headphones amp. there is Ok I have done some experimentation with a tube gain stage followed by a cathode follower. asc 3 KB · Views: 198 In the bigger 36/40W H&K models there is usually a Direct Coupled Cathode Follower (DCCF) stage. Typically modern tubes with spiral Is any body running a NOS 12AX7 in the cathode follower positions in their Dual, Triple Rectifier, Road King II or Roadster? I was looking at Note that after a cathode follower the slope resistor is usually 33K - 56K; plate driven usually about 100K - 150K. fcqp, zvzs4c, g1ty, cy97v, yj8z, fvc0y, 1ohn, ckxqdw, glraa, nzcc,