A copy of the 2x30W EL34 tube amplifier:
but redrawn using EasyEDA valve symbols with simulation models and the output transformer modelled so that the whole amplifier (excluding the PSU) can be simulated.
The transformer model is the subcircuit that is used for the transformer symbol in the amplifier simulation.
Simulation of a complete Korg Nutube 6P1 Double Triode device using a model developed for EasyEDA by signality.co.uk from the single Nutube12 model of the single triode, supplied by Korg.
The demonstration circuits are based on information in: