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The original version can be found 
Hello!
I want to present a stereo tube amplifier based on EL34, 6H8C, ECC82, EM84 tubes according to Williamson's scheme with some modifications. An additional anode voltage filter is added to the first amplification stage, and the EM84 lamps drive indicators are also mounted
All housing elements are made as single copies.
The layout is made on the PCB also of my development.
The loudspeaker transformers are made by Mr. Łukasz Koza from Krakow,
Network transformer produced by JDJ Elektronics Łódź {recommend} replaced in 2018.
The amplifier was created in 2011 for my son Mariusz.
The amplifier has been working for the eighth year and at that time only the power transformer made by P. Koza was overheating so I had to replace it.
It was made to order by Mr. Kwiatkowski JDJ, it works great, it does not hum !!! does not heat up!
By the way, I replaced the first input signal capacitors with MUNDORF, they are expensive, but I recommend them, listening is much better.
There were no major problems with starting it, there was only a small hum that had to be eliminated, but it was a matter of mass handling.
Driving the masses is the most important thing in this type of construction !!!
Signal cables and the placement of input sockets are also of great importance.
To avoid tube pairing, although I always try to use tubes with similar parameters, I used a separate volume potentiometer for each channel.
The volume of each channel is adjusted separately - this is very practical.
The loudspeakers can be placed in different places, and the listening level of each channel is set as needed.
The lamps that work are the production of DDR / RFT and Russia.
Regards, Leszek
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The devil is in the details!