pivot wrote:Tubes natrually have some thermal noise - nature of the beast - but a correctly designed circuit should not be intrusively noisy
Looks like 12AX7/ECC83 are the gain stages for phono. What brand of tube is used?
There can be a fair amount of variation between brands of 12AX7. Electro Harmionic are current manufactured Russian tubes that should be fairly quiet. Try some tube rolling? If you already have EH onboard maybe try some JJs or Svetlanas?
4 x EL34, Eastern Harmonics.
The other 7 are non branded, only have the Luxman L on them.
Of the 7, 4 are 82's , 3 being uncovered, and 1 has a black spring loaded cover on it.
The other 3 , all of which have black covers, are 83's.
The Luxman website says its the other way around, 4 x 83s and 3 x 82s.
I'm a little confused.
You'll hear Angel Trumpets and Devil Trombones...you are invited.
Delphi/SME/Shelter/Whest/Trigon Pre & Powers/McCormack/NEAT Ultimatums/Squeezebox