Triode Amplifiers

Pentode & Tetrode Amplifiers

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Time Machine 45 / 2A3-SE
Time Machine 300B-SE
Time Machine Duo
Time Machine 2A3-PP
Available to order.

PRICE $3995.00 with Shuguang 2A3C, Tung-sol 6SL7 small signal tubes and Svetlana 5U4g rectifier tubes.
Built on large format chassis with Teflon tube sockets and heavy duty power supply.

The Time Machine 2A3PP is a stereo (two-channel) amplifier rated at 7 watts class A per channel into 8 ohms. It uses a simple input / voltage gain and phase inverter satge with the bare minimum of components: The input stage can have a big impact on the sound quality of an amplifier, and good quality driver vacuum tubes should be used. This is why Tung-sol 6SL7’s are included. The output stage of the Time Machine 2A3PP is a standard self-biasing setup that, whilst not giving maximum output, gives maximum reliability. It also avoids the use of silicon diodes in the bias network. This is then coupled to custom wound output transformers (the heart and soul of every valve amplifier). Every output transformer is painstakingly wound by myself to exacting specifications. The 2A3PP output transformers are wound with 27 interleaved layers to offer a level of detail and micro detail only found in very few amplifiers. No global feedback is used in this amplifier.


Power Output - 7 watts per channel

Frequency response -3db - 10hz to 40khz

Separation - > 55db

Signal to Noise - > 85db

Signal to Hum - > 70db

Distortion - < 0.5% at 1.0 watt

Hum Level - < 2.0millivolt

Sensitivity - 800mV

Inputs - 4

Speaker output - 8 ohm (6 to 12ohm)

Damping factor >3.0 20hz to 20khz 8 ohms

Weight ~20kg (~44lb)

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Hand Crafted Valve Amplifiers