Tube Preamp Schematic of Preamplifier with 56 Triodes and Line Output Transformer


The indirect-heated US-Triodes 27, 37, 56 and 76 can be used for nice and simple Preamps. Here 56 with mesh-plate and Line-Output-Transformer Tango NP 126, wired 20k Primary and 1.2k Output-impedance. With the 1k Outputresistor you can affect the low frequency reproduction.

The AZ1 is a European direct heated Rectifier. The 47k resistor reduces the voltage while the triodes are warming up.

Preamplifier with 56 Triodes and Line Output Transformer - Picture 1 Preamplifier with 56 Triodes and Line Output Transformer - Picture 2 Preamplifier with 56 Triodes and Line Output Transformer - Electronic Schematic


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