05-23-2016, 10:42 AM
(This post was last modified: 05-23-2016, 10:48 AM by GoldenVulture.)
PI is only necessary when your running push/pull pairs. splits your signal into a 180 Deg phase difference.
The basic concept of the power amp section is pretty simple. Signal into valve , out of valve and into transformer to speaker.
It is essentially always on max output. Alittle water anology. Water is the signal . Preamp is a tap. Power amp is the pipe its feeding into.
Driving your output valve would be say a 12A** valve. Something like a 12AT7 [ i hope I've got that right ] is used because it has a stronger output current to drive the output valve than a 12AX7. The trade off is it doesn't have as large a gain factor.
The basic concept of the power amp section is pretty simple. Signal into valve , out of valve and into transformer to speaker.
It is essentially always on max output. Alittle water anology. Water is the signal . Preamp is a tap. Power amp is the pipe its feeding into.
Driving your output valve would be say a 12A** valve. Something like a 12AT7 [ i hope I've got that right ] is used because it has a stronger output current to drive the output valve than a 12AX7. The trade off is it doesn't have as large a gain factor.