• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Parallel PP ECL86

Not properly. ECL86 works at lower voltage and has higher resistance. The driver triode compared to 12ax7 has reduced Ra at the same voltage, the output pentode is closer to EL86 than El84.

Despite these inaccurate comparison, the schematic from Yves is different to all published on the net and is simple, clever and cheap (less tube, simplified wiring..).

Yves have You also the winding and constructional data of the transformers? If You'll provide a transformer kit for this project, I book one!