Hi
I have been working on the gain calculation of a tube class AB output stage and I cannot proof that the gain is equal when the stage is in class A region and class B region. This is my work:
You can see the gain of the two region is different.
For class A region, I use Fig.33b in p437 of this article:https://pearl-hifi.com/06_Lit_Archive/07_Misc_Downloads/Push_Pull_Theory_MIT.pdf
For class B, I just use the fact the one tube is off, half of the primary winding is out of the picture and the primary impedance see by the single valve is Rpp/4 and calculate the gain as shown.
Please comment on the derivations.
Thanks
I have been working on the gain calculation of a tube class AB output stage and I cannot proof that the gain is equal when the stage is in class A region and class B region. This is my work:
You can see the gain of the two region is different.
For class A region, I use Fig.33b in p437 of this article:https://pearl-hifi.com/06_Lit_Archive/07_Misc_Downloads/Push_Pull_Theory_MIT.pdf
For class B, I just use the fact the one tube is off, half of the primary winding is out of the picture and the primary impedance see by the single valve is Rpp/4 and calculate the gain as shown.
Please comment on the derivations.
Thanks