Since I'm just looking I'm not going to comment on what appear to be coupling capacitors placed after the potentiometer ...
Soro that is quite beautiful.
But since this is the solidstate forum ( we hate tubes
), you might wanna brag in the tube forum: Tubes / Valves - diyAudio
(...at least you should also show your stuff in there)
Keep up the good work.😎
But since this is the solidstate forum ( we hate tubes
), you might wanna brag in the tube forum: Tubes / Valves - diyAudio(...at least you should also show your stuff in there)
Keep up the good work.😎
sorry to make confused to you.Soro that is quite beautiful.
But since this is the solidstate forum ( we hate tubes
(...at least you should also show your stuff in there)
Keep up the good work.😎
and I wii post on Tubes / Valves
in my circuits is use Tube and op.
so I post on here.
1. Which opamp are you using?
2. Why don't you use the opamp in inverting mode? (the tubestage inverts the signal)
3. Can the tube really run on only 12 V anode?
2. Why don't you use the opamp in inverting mode? (the tubestage inverts the signal)
3. Can the tube really run on only 12 V anode?
1.I use Ne5532 or 2604.
2.just want to try tube can work in low power supply or cannot.
3.yes tube really run on 12V. and only single 12V power supply.
But since this is the solidstate forum ( we hate tubes
Speak for your self, tubes are cool (as in neat, not literally).......and they make great amplifiers.🙂
Just most people here have more experience with sand than those empty glass thingies.😛
incidently, I've never seen a triode work linearly at 12V plate voltage, seems a bit low......and direct coupled to an op-amp without coupling cap and DC reference for op-amp.
Last edited:
Firstly let us say Hi to forum🙂
1)For the gain>=5 opa637 is very good and stable.If gain <=5 opa627 is stable and good
2)Some people use in inverting mode.I am not sure why people does not want to invert the signal.Maybe it is about phase shift
3)Yes i remember that a tube headphone amp works at 9vdc
1)For the gain>=5 opa637 is very good and stable.If gain <=5 opa627 is stable and good
2)Some people use in inverting mode.I am not sure why people does not want to invert the signal.Maybe it is about phase shift
3)Yes i remember that a tube headphone amp works at 9vdc
excellent with running tubes at 12v and direct coupling to opamps.
Maybe one should try some tubes some day.
Maybe one should try some tubes some day.
Most op-amps can take 30-36 Volt supply. (2 x 18 VDC)
I would go for more voltage.
Even if some tubes can work at 12 Volt
they surely will work better at 36 Volt
I would go for more voltage.
Even if some tubes can work at 12 Volt
they surely will work better at 36 Volt
but 12V bettery is easy to get.and it has many type you can choose.
and 12V is more switch power supply you can get it.
- Status
- Not open for further replies.