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Original Message

PI Balance

Posted by Triode_Kingdom on June 17, 2021 at 07:33:53:


"The advantages of the adjustable floating paraphase inverter is that you can adjust symetry with output tubes that have either more or less different amplification factors."

It's possible to adjust balance with any phase inverter, including the cathodyne. The LTP inverters in the amp I'm building now will have adjustable balance. The circuit is similar to the Citation V, although I'm using different tube types and component values. It's also worth nothing that imperfect balance here is largely compensated when NFB is used and the PI is included in the loop. Bandwidth is important for this purpose, and the LTP is excellent in that regard.