We use tube curves based on the old tubes to design gear. Modern tubes behave slightly differently and most certainly the Russian tubes are NOT direct drop-in replacements for old Mullard designs. Russian Tubes today can handle more current in many designs and require it to sound good.
Much of the NOS stuff is fraud and nonsense IMO, as many of the "better" sounding tubes have no bass or treble thus softening a truly nasty speaker,cartridge or CD player and making an awful system palatable. That is, when the NOS tube is what it has been labeled or is not a completely worn out "pull".
Richard
Much of the NOS stuff is fraud and nonsense IMO, as many of the "better" sounding tubes have no bass or treble thus softening a truly nasty speaker,cartridge or CD player and making an awful system palatable. That is, when the NOS tube is what it has been labeled or is not a completely worn out "pull".
Richard