Enough 2A3 but expensive.
What LPF do you use?
What LPF do you use?
Used I2S isolator but introduces noise.
Bela is not too much amplification 4X, do you know another DHT 2X to reach the 2VRMS output?
2A3 is the same like the Russian 6S4S or 6C4C?
Thank you
Neat, what's the corner frequency Fc? What's the pourpose of resistor 1.5K?
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Instead of building some half baked DHT output for this very dubious project, why don't you build a no-compromise DHT preamp which will work with the nodac but also work with any future projects too? It will very likely be transformer coupled and this will also take care of filtering >100kHz.
I will offer 3 ideas.
1: If all you have to do is basically double the voltage, I would just use a step up transformer. A step up transformer is going to do a better job than a tube ever could.
2: If you have to use a tube and it has to be a DHT, I would look into the 300b. Theoretically it could be configured to give you 600 ohms for the output impedance which might have some neat applications.
3: If you want a tube, but would be willing to consider an indirectly heated triode, then a 6as7g might be neat *shrug*
I would just shoot sowter an email. If you show them what you are up to, they can recommend you a decent transformer.
1: If all you have to do is basically double the voltage, I would just use a step up transformer. A step up transformer is going to do a better job than a tube ever could.
2: If you have to use a tube and it has to be a DHT, I would look into the 300b. Theoretically it could be configured to give you 600 ohms for the output impedance which might have some neat applications.
3: If you want a tube, but would be willing to consider an indirectly heated triode, then a 6as7g might be neat *shrug*
I would just shoot sowter an email. If you show them what you are up to, they can recommend you a decent transformer.
I supposed did you used a 4th order low pass filter.
1: Interested what I don't want a custom step up transformer to avoid high prices.
2: 300B is a expensive DHT & I guess I didn't need that gain.
3: Used the 6AS7 as output in a headphone amp but I prefer DHT.
See post 19 mine answer 1
Could you elaborate why you chosen two corner frequencies and what's the final Fc?
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