Introduction & General Description of Operation

---

Zeus System - Pre + Power

Full end to end configuration with TX-102 TVC input.

---

Zeus-75

Class A (AB) monoblock power amplifier with separate PSU.

---

Zeus 75 Amplifier and Power Supply Concept CAD Image

Zeus 75 Distortion versus Power Output.

Use with 4 ohm impedance speakers with 2:1 step down output is not normally recommended but this graph is to demonstrate the amplifier operation where distortion level plateaus at 1% (unlike conventional amplifiers where it would continue to rise).

Power at maximum output is over 100 watts.

Note: Full Class A or Class AB operation depends on output transformer configuration, mosfet bias level and load being driven.

DIY

	Building a Zeus 75 - Information on Construction
	Input Transformer Specification
	Output Transformer Specification - 75W
	MOSFET Matching with L200 Current Source
	FFT Test Result with 2SK1529 Audio FETs

---

Zeus Pre-amp / Line Drivers

SE and PP pre-amplifier variations.

---

	Zeus SE MOSFET Line Driver - info & FFTs TX-102 variable attenuator mosfet preamp line stage.
	Zeus 6C33C Triode PP Line Driver - info and FFTs
	Zeus PP MOSFET Line Driver - info & variations including SE & toroid output transformer.

---

Zeus 35 Monoblock Power Amplifier

My original prototype power amplifier.

---

Original Zeus 35 Amplifier Internal View - One of a Pair.

Original IRFP150 35 W Amplifier built in 1995 With FFT and THD+N test results

---

Additional Experimental Information

These pages show examples of what can be done with the Zeus topology.

---

	Single Ended Version
	Toroid Transformer Version 3rd March 05 (updated schematic plus added notes).
	2 Stage Amplifier - Variations
	Schematic Diagrams - misc Includes temperature tracking Vbias schematic.
	Output Transformer Tri-Filar Winding Illustration. This image shows the basic principle of how the multi-filar transformers are constructed.