• 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.

EL84 Parallel SE

Then I didn't understand what you mean by "flexible".
However, I went on ... I started this thread with a largely wrong schematic and now, thanks to the help of all of you, I have a correct schematic that has evolved gradually taking into account also the materials I have ... in the meantime i started building it and I learned more about what I'm doing, it doesn't seem small to me.


You were building a 6Y6 SE amp in another thread just a few days ago. Did you finish that project? What results did you get?🙄
 
You were building a 6Y6 SE amp in another thread just a few days ago. Did you finish that project? What results did you get?🙄


I had already built and listened to it ... then I followed your advice and I slightly changed it but I haven't listened to it yet ... it will sound better than the already good one that was before, i guess ...
I can't listen to it because it's set on a container that has a series of transformers, switches and a part of the power supply that is common to all amplifiers.
Unfortunately I can't work on it too long every day because I have severe back pain so when they become unbearable, I have to do something else. In the meantime I'm thinking of designing an amplifier similar to the one with the EL84, but using 2 6Y6 and, as a preamp, a CF that however uses 2 different tubes for the 2 stages (for example 6SL7 + 6AS7), but I'm still not able to do it alone.
 
I completed the makeshift assembly ... now I wait to find a couple of components that I miss at an acceptable price.

from accounts better redone, for OT of 1350 ohm it has Pout 4.5w and Dout 9% ... not a great result ...
 

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I tested it ... it sounds good and more than I expected but it produces a fixed rumble and I couldn't understand where it came from ... the packaging is too convulsive, i mean ... I should find a way to pack it in a wider chassis with the power supply furthest from the rest of the circuit.