Hi all.
Now it's the turn of the tube amplifier to have an upgrade.
My Decware SE-84C+ SET 2wpc came with Russian tubes.
Two SV83 pentode connected in triode mode.
One (No name I could not see the name) 6922
and a rectifier 5Y3 make : Ruby.
For the SV83 I tried the Gold Lion EL84, the Electro Harmonic EL84
and it was very difficult to tell the sound difference between the two makes,
what didn't help, was the fact thet my sound memory in my brain
(Like many audiophile) is very short,
I cannot memorized more than 3 seconds of music.
So by the time you shut off the power, remove carefully the tube with some gloves
or a clean rag, put the new tubes, put back the power and
wait for the tubes to warm up,
what I have memorized is erase from my music brain.
However, I did noticed a small improvement with the Gold Lion EL84,
but maybe it was my imagination.... ? ? ? ?
For the 6922 I had several different makes : RCA, Thomas, Sylvania, Electro Harmonic
and between all of them, could not hear any differences.
Now, the rectifier, many claim that the rectifier model makes a difference in the sound,
so the original Ruby 5Y3, the 5U4 RCA and the Sovtek 5AR4 no difference for me in the sound,
therefore,
I'm using the 5AR4 Sovtek, the Electro Harmonic 6922 and the Electro Harmonic EL84
and I am happy with the sound.
I don't know what else I could have done to improve the sound.
Maybe a pre-amplifier ? ? ?
That's a big investment for me.
Guy 13