Malysh Amplifiers

Malysh

Tube Amplifiers with Character

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Specifications

Parameter	Value
Circuit Type	Push-Pull Class A/AB
Output Tubes	G-807 (2 pcs)
Driver/Phase Inverter	6N23P-EV (2 pcs)
Power	2×15W (into 4-8 Ohm load)
Frequency Range	15 Hz – 40 kHz (±1 dB)
THD	< 1% at rated power
Inputs	RCA (stereo)
Volume Control	ALPS (motorized)

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Signal Architecture

RCA Input → ALPS Pot → 6N23P-EV (driver) → 
Phase Inverter → G-807 (output stage) → TVZ → Speakers

Stages

1. Input Stage — Motorized ALPS potentiometer
2. Driver Stage — 6N23P-EV, voltage gain
3. Phase Inverter — Split-load circuit
4. Output Stage — G-807 in push-pull configuration
5. Transformers — TVZ on OSM cores

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Operating Modes

Mode	Idle Current	Class	Sound
A	60 mA	Pure Class A	Soft, detailed
AB	45 mA	Class AB	Dynamic, powerful

Mode selected via tube controller or set fixed in PSU.

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Supported Tubes

Thanks to the universal platform and Tube controller, Malysh is capable of working with a wide range of output tubes:

G-807 — Signature Tube of Malysh

Tube	Equivalent	Sound Character
G-807	—	Charisma and power, signature Malysh sound
6P3S	6L6	Classic, warm bass
EL34	—	British rock, aggressive mids
6P36S	—	Low impedance, bass control
6P44S	—	Detailed highs, fast response
GU-50	—	Tank sound, maximum power

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Measurement and Calibration

Curve Tracer

Built-in system automatically captures tube characteristics:

• Ia (anode current) — vs voltage
• Vg (grid voltage) — bias curves
• Emission — residual cathode life

Auto-Bias

Tube controller holds idle current with 0.1 mA precision:

• Automatic adjustment during warmup
• Compensation for tube aging
• Degradation notifications

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Connections

[Source] → RCA → [Malysh] → Speakers
                    ↓
              USB/Ethernet → PC (Lisp agent)

Interfaces

Port	Purpose
RCA	Stereo input (line level)
USB	Debug, firmware, curve tracing
Ethernet (production)	Network, remote monitoring

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