RCA with clear glass 6SN7GTB from 1956 sold to me by Tube World. A small bottle with black base. Sounds smooth. I know it is not the best RCA there is.
The Sylvanias were also small bottle, chrome top cryod,1960's. Sold them.
The Tungsols where lent by a friend they were NOS, do not have them.
But my theory or point is that we tweakers do not realize sometimes the voicing process in the design of electronics. The better designers listen to their products and optimize them for the parts and or tubes they use.
Sometimes we go ahead and start swapping caps, tubes, resistors... and because it sounds different we think it is better. Sometimes that happens but not always.
The Sylvanias were also small bottle, chrome top cryod,1960's. Sold them.
The Tungsols where lent by a friend they were NOS, do not have them.
But my theory or point is that we tweakers do not realize sometimes the voicing process in the design of electronics. The better designers listen to their products and optimize them for the parts and or tubes they use.
Sometimes we go ahead and start swapping caps, tubes, resistors... and because it sounds different we think it is better. Sometimes that happens but not always.