Hello people
I am planning to build an tube single end headphone amplifier.
I have at home:
1par 6n1p-ev
1pair 5963
1pair reinhofer trafo 10k sec
1 r-core trafo 170v sec
I am thinking parallel 6n1p-ev 220 cathode resistor and a 1kf capacitor for each one or maybe shared 110 cathode resistor and capacitor
I prefer to use these tubes but I am open to opinions
I'm not an expert tube, but I make several solid state amplifier
Someone help
Tanks
I am planning to build an tube single end headphone amplifier.
I have at home:
1par 6n1p-ev
1pair 5963
1pair reinhofer trafo 10k sec
1 r-core trafo 170v sec
I am thinking parallel 6n1p-ev 220 cathode resistor and a 1kf capacitor for each one or maybe shared 110 cathode resistor and capacitor
I prefer to use these tubes but I am open to opinions
I'm not an expert tube, but I make several solid state amplifier
Someone help
Tanks
Have a look at the Tubelab SSE.
Alternatively, I suggest grabbing a copy of Morgan Jones' "Valve Amplifiers" and start reading.
With tube amps, you'll be dealing with high voltages - lethal voltages - so I highly recommend doing a bit of reading before you start. Morgan Jones is a good place to start.
Tom
Alternatively, I suggest grabbing a copy of Morgan Jones' "Valve Amplifiers" and start reading.
With tube amps, you'll be dealing with high voltages - lethal voltages - so I highly recommend doing a bit of reading before you start. Morgan Jones is a good place to start.
Tom
I assume you mean these:
- 1pair 6n1p-ev as output tube in a common cathode configuration with self bias cathode resistor and bypass cap.
- Use OPT with10k (primary)
- PT has 170v sec using silicon rectifier with 230V or so B+
- I am thinking of using parallel 6n1p-ev with 220R cathode resistor and a 1000uf capacitor for each cathode (or use one single 110R and 2000uF cap for shared cathode)
Seems close enough and correct for me. This should yield around 2.5V bias and 11mA Ip for each triode (22mA per tube).
Plate dissipation is about ~222v*11mA or ~2.4W, only a bit over 2.2W spec.
- 1pair 6n1p-ev as output tube in a common cathode configuration with self bias cathode resistor and bypass cap.
- Use OPT with10k (primary)
- PT has 170v sec using silicon rectifier with 230V or so B+
- I am thinking of using parallel 6n1p-ev with 220R cathode resistor and a 1000uf capacitor for each cathode (or use one single 110R and 2000uF cap for shared cathode)
Seems close enough and correct for me. This should yield around 2.5V bias and 11mA Ip for each triode (22mA per tube).
Plate dissipation is about ~222v*11mA or ~2.4W, only a bit over 2.2W spec.
I only use 175v on anode, 2v cathode 9ma (per tube 18ma) maybe good or wrong!?
lm317 CCS is another options
lm317 CCS is another options
Those are good number for a 6N1p. You will need a negative supply for an LM317 if you plan to use it as a CCS. 2.0V is below the minimum LM317 CCS.
The 6n1P is not realty man enough for a headphones anp, even paralleled, which is why they tend to be run beyond their design parameters (not a good recipe for long tube life). If you want a tube headphones amp capable of driving just about any type of headphone without busting a gut or introducing huge amounts of distortion you could try my improved headphones amp project based on Pete Millet's original. You can find details in the phonesamp folder of the DIY tab of my web site here:
DIY - Custom Tube Consoles
The PCB is open source so anyone can download the Gerber files and make them (they are in the opensourcepcbs folder just above the phones amp folder).
If the Sowter transformers are too expensive, Edcor make suitable replacements or you could try your current 10K primary transformers.
Cheers
Ian
DIY - Custom Tube Consoles
The PCB is open source so anyone can download the Gerber files and make them (they are in the opensourcepcbs folder just above the phones amp folder).
If the Sowter transformers are too expensive, Edcor make suitable replacements or you could try your current 10K primary transformers.
Cheers
Ian
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