Amplifier for headphones. A lot of time I devoted to studying the question - which valves are best for sound from low-power. I found next 2 favorits: PX4 Marconi-Osram 1 generation with barium anode (1920s) Sonatron 71a (171-A). Any body hear this tubes? Are there any better ones? Thanks. Best wishes.
The first thing you must do is decide what parameters you require as that alone determines the amount of distortion produced by the choice of valve.
The size of valve, anode area/cathode material determines the amount of power that can be produced and other parameters.
So, there is no best sounding valve.
The size of valve, anode area/cathode material determines the amount of power that can be produced and other parameters.
So, there is no best sounding valve.
The first thing you must do is decide what parameters you require as that alone determines the amount of distortion produced by the choice of valve.
The size of valve, anode area/cathode material determines the amount of power that can be produced and other parameters.
So, there is no best sounding valve.
Agree.
On this moment definitely i thick only - output power 0.1-1 watts, and impendance 32-42 Ohm.
Other parameters - too width range of conditions.
Just best sound.
Thanks!
Great!
I don`t hear earlier about 1626 and VT-137.
Thanks!
Great!
I don`t hear earlier about 1626 and VT-137.
Another good tube in that amp is the 12B4 tube using an adapter. It will yield a bit more power and is more open sounding. They glow nicer too!!
PX4 first generation take much small power - 1 watt.The datasheets say 4.5 watts at 4% THD for a SE PX4- a bit better than 2A3. The Soviet 4P1L is very popular on this forum and there are a number of lengthy threads you can check.
PX4 audio valve, power triode technical data
They sound too very better then next generations with much higher power.
I used a 6n6p in a headphone amp too-but with an OPT.
I use this circuit The output is push pull though.
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Sure, overprice - much higher them $1000 usd a pair.I see; these must be very expensive though?
I don`t very long finding.
I have some datasheets for the -ER suffix type which states 330 V for both anode and screen.
Also, 65 mA cathode current max, which is useful since most of the other datasheets just give a pulse current max. Maybe needs a bit of derating since the -ER has a slightly (800 mA) more powerful heater.
Also, 65 mA cathode current max, which is useful since most of the other datasheets just give a pulse current max. Maybe needs a bit of derating since the -ER has a slightly (800 mA) more powerful heater.
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