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My, those nuTubes are kind of pricey and very specialized. So I’m not sure why everyone wouldn’t just go with a simple 9-pin dual triode which almost grow on trees. The 12au7 is best for low voltage use, being able to run off the amps power rails. You really don’t neec a pcb for this, just a place to mount a socket and then solder up a few parts. And I’m pretty sure there are lots of ready to go options on eBay too.
I’ve had harsh sounding set ups myself and ended up replacing speakers, amps and sources as needed - maybe I should’ve tried a no-gain cathode follower tube buffer. For modest gain there are many pre amp options too such as Salas simple 6v6 based common cathode stage.
I’ve had harsh sounding set ups myself and ended up replacing speakers, amps and sources as needed - maybe I should’ve tried a no-gain cathode follower tube buffer. For modest gain there are many pre amp options too such as Salas simple 6v6 based common cathode stage.
Maybe the price has come down but compare the amount of electrical "work" a korg neutube cando with a 12ax7.
They operate at extremely small signal voltages and cost a fortune compared with a good 12ax7 which can take 350v on the plate and actually move some electrons around...
They operate at extremely small signal voltages and cost a fortune compared with a good 12ax7 which can take 350v on the plate and actually move some electrons around...
Nutube and 12ax7 can not drive purifi directly. To low current out( need 5mA at 10Vrms). They need another output buffer.
Therefore I use 6n6p,6n30 or ecc99 tubes, they have no problem to drive Purifi with low distorsion.
Therefore I use 6n6p,6n30 or ecc99 tubes, they have no problem to drive Purifi with low distorsion.