Audio Asylum Thread Printer
Get a view of an entire thread on one page
|For Sale Ads|
In Reply to: RE: That's not correct posted by Triode_Kingdom on June 14, 2017 at 10:16:19
I think you meant Class AB2. More like solid state. With the tubes barely on.
The "2" has nothing to do with where you bias the tubes.
It has to do with how hard you plan to drive them.
When the driver stage is up to the task you can drive the output tubes into grid current (grid positive WRT the cathode). That's the "2" part.
"With the tubes barely on" is Class B (or at least what they call Class B).
The "barely on" part is just to keep the notch distortion down.
True Class B (rarely used for audio) is when the tubes are both in cutoff (not just in the cutoff region but in real cutoff ie; no current flowing) in the absents of input signal.
Now, just to start a flame war, in true Class A the tubes are never allowed to enter the cutoff region (the region approaching cutoff where the linearity of the tube goes to sh_t or the non-linear region close to saturation).
Class of operation is more than just the bias point. It's how the tube is biased, how the tube is loaded and how hard the tube is intended to be driven.
Have Fun and Enjoy the Music
"Still Working the Problem"
Nothing to do with SS, have no idea what you mean. What I said is accurate.
Buy Chinese. Bury freedom.
Post a Message!
This post is made possible by the generous support of people like you and our sponsors: