Matsuo Bashō was one of the famous Japanese Zen master from 17th Century.
As Zen teaches to live a Simple lifestyle, I thought of creating a Simple SE Class A headphone amp which can even be used a line pre amplifier. Been a Fan of Class A single ended design , very day i tried PCA designed by XRK971.
Initial Gain Stage that i made with two 2SK209GR and one resistor,
Results are still impressive , on 20K load it archived
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.718e-01 1.000e+00 180.00° 0.00°
2 2.000e+03 1.117e-04 6.501e-04 89.82° -90.18°
3 3.000e+03 1.368e-06 7.966e-06 -179.22° -359.21°
4 4.000e+03 2.014e-08 1.172e-07 -93.47° -273.46°
5 5.000e+03 2.958e-10 1.722e-09 31.05° -148.94°
6 6.000e+03 7.365e-11 4.288e-10 -138.89° -318.89°
7 7.000e+03 7.373e-11 4.292e-10 -170.78° -350.78°
8 8.000e+03 6.321e-11 3.680e-10 72.07° -107.93°
9 9.000e+03 5.146e-11 2.996e-10 -151.24° -331.24°
Total Harmonic Distortion: 0.065015%(0.065014%)
Now this topology needs to get muscular strength, I mean N Channel Mosfet.
I want to add Fairchild FQP30N06 as output buffer.
Ltspice Spice Sim is attached.
As Zen teaches to live a Simple lifestyle, I thought of creating a Simple SE Class A headphone amp which can even be used a line pre amplifier. Been a Fan of Class A single ended design , very day i tried PCA designed by XRK971.
Initial Gain Stage that i made with two 2SK209GR and one resistor,
Results are still impressive , on 20K load it archived
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.718e-01 1.000e+00 180.00° 0.00°
2 2.000e+03 1.117e-04 6.501e-04 89.82° -90.18°
3 3.000e+03 1.368e-06 7.966e-06 -179.22° -359.21°
4 4.000e+03 2.014e-08 1.172e-07 -93.47° -273.46°
5 5.000e+03 2.958e-10 1.722e-09 31.05° -148.94°
6 6.000e+03 7.365e-11 4.288e-10 -138.89° -318.89°
7 7.000e+03 7.373e-11 4.292e-10 -170.78° -350.78°
8 8.000e+03 6.321e-11 3.680e-10 72.07° -107.93°
9 9.000e+03 5.146e-11 2.996e-10 -151.24° -331.24°
Total Harmonic Distortion: 0.065015%(0.065014%)
Now this topology needs to get muscular strength, I mean N Channel Mosfet.
I want to add Fairchild FQP30N06 as output buffer.
Ltspice Spice Sim is attached.
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Hi PRR,
Shall i add some gate bias res then? But i guess not needed.
I think J1 will provide bias current to Q1.
Shall i add some gate bias res then? But i guess not needed.
I think J1 will provide bias current to Q1.
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PSPICE lib file provided by ONSEMI is not working on LTSPICE
FQP30N06: Power MOSFET, N-Channel, QFET<sup>(R)</sup>, 60 V, 30 A, 40 mΩ, TO-220
Please someone help me.
I am attaching the LTSPice file.
FQP30N06: Power MOSFET, N-Channel, QFET<sup>(R)</sup>, 60 V, 30 A, 40 mΩ, TO-220
Please someone help me.
I am attaching the LTSPice file.
Tried ZXMN10A08E6 mosfet , ZXMN10A08E6 (MOSFET Master Table)
Still didn't work, everytime lt spice fail
feeling frustrated
Still didn't work, everytime lt spice fail
feeling frustrated
<CTRL>+Right mouse click on 'M1'
Change 'Prefix' to X
This lets LTSpice know that you want to use a subckt.
Attachments
With Zetex ZXMN10A08E6 Mosfet, at 25db Gain Well well that will destroy my ears
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 2.618e+00 1.000e+00 179.15° 0.00°
2 2.000e+03 5.742e-03 2.193e-03 -92.55° -271.71°
3 3.000e+03 1.936e-03 7.396e-04 -140.36° -319.51°
4 4.000e+03 2.486e-04 9.495e-05 51.55° -127.61°
5 5.000e+03 1.141e-04 4.357e-05 60.23° -118.92°
6 6.000e+03 2.419e-05 9.242e-06 -179.06° -358.21°
7 7.000e+03 1.135e-05 4.337e-06 -108.40° -287.56°
8 8.000e+03 4.458e-06 1.703e-06 -13.87° -193.02°
9 9.000e+03 1.890e-06 7.219e-07 47.55° -131.60°
Total Harmonic Distortion: 0.231720%(0.231716%)
Gotta bring the gain down
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 2.618e+00 1.000e+00 179.15° 0.00°
2 2.000e+03 5.742e-03 2.193e-03 -92.55° -271.71°
3 3.000e+03 1.936e-03 7.396e-04 -140.36° -319.51°
4 4.000e+03 2.486e-04 9.495e-05 51.55° -127.61°
5 5.000e+03 1.141e-04 4.357e-05 60.23° -118.92°
6 6.000e+03 2.419e-05 9.242e-06 -179.06° -358.21°
7 7.000e+03 1.135e-05 4.337e-06 -108.40° -287.56°
8 8.000e+03 4.458e-06 1.703e-06 -13.87° -193.02°
9 9.000e+03 1.890e-06 7.219e-07 47.55° -131.60°
Total Harmonic Distortion: 0.231720%(0.231716%)
Gotta bring the gain down
2.5vpp into 20K load ( Let say TDA7293 AMP) ,
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 2.662e+00 1.000e+00 179.23° 0.00°
2 2.000e+03 1.809e-03 6.794e-04 153.37° -25.86°
3 3.000e+03 9.733e-04 3.656e-04 -111.12° -290.35°
4 4.000e+03 2.265e-04 8.508e-05 -1.85° -181.08°
5 5.000e+03 8.629e-05 3.241e-05 78.25° -100.98°
6 6.000e+03 2.891e-05 1.086e-05 167.43° -11.80°
7 7.000e+03 1.071e-05 4.023e-06 -106.06° -285.29°
8 8.000e+03 3.943e-06 1.481e-06 -18.90° -198.13°
9 9.000e+03 1.500e-06 5.636e-07 68.17° -111.06°
Total Harmonic Distortion: 0.077697%(0.077687%)
1vpp into HiFiman HE560 [I plan to own in future] , 45ohms load
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.014e+00 1.000e+00 179.01° 0.00°
2 2.000e+03 4.603e-03 4.537e-03 -81.17° -260.18°
3 3.000e+03 5.649e-04 5.569e-04 -161.45° -340.46°
4 4.000e+03 6.193e-05 6.105e-05 101.54° -77.48°
5 5.000e+03 9.399e-06 9.265e-06 17.13° -161.88°
6 6.000e+03 1.656e-06 1.633e-06 -34.11° -213.13°
7 7.000e+03 8.824e-07 8.699e-07 -1.98° -181.00°
8 8.000e+03 8.799e-07 8.674e-07 1.12° -177.89°
9 9.000e+03 7.843e-07 7.732e-07 0.10° -178.92°
Total Harmonic Distortion: 0.457174%(0.457172%)
250mv into 250ohms load (Like Beyerdynamic DT770 Pro)
[ Enough to fry my ear cannot say about other people]
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 2.640e-01 1.000e+00 179.21° 0.00°
2 2.000e+03 2.243e-05 8.497e-05 -105.19° -284.40°
3 3.000e+03 1.127e-06 4.270e-06 -131.96° -311.16°
4 4.000e+03 2.594e-08 9.827e-08 16.16° -163.05°
5 5.000e+03 1.079e-08 4.088e-08 3.03° -176.18°
6 6.000e+03 8.707e-09 3.298e-08 0.29° -178.92°
7 7.000e+03 7.393e-09 2.800e-08 0.26° -178.94°
8 8.000e+03 6.381e-09 2.417e-08 0.27° -178.94°
9 9.000e+03 5.585e-09 2.115e-08 0.27° -178.93°
Total Harmonic Distortion: 0.008508%(0.008407%)
100mv into 250ohms load (Like Beyerdynamic DT770 Pro)
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.056e-01 1.000e+00 179.21° 0.00°
2 2.000e+03 3.582e-06 3.392e-05 -105.05° -284.26°
3 3.000e+03 6.783e-08 6.423e-07 -127.86° -307.07°
4 4.000e+03 6.054e-09 5.733e-08 1.89° -177.32°
5 5.000e+03 4.577e-09 4.334e-08 0.26° -178.95°
6 6.000e+03 3.784e-09 3.583e-08 0.27° -178.93°
7 7.000e+03 3.211e-09 3.041e-08 0.24° -178.96°
8 8.000e+03 2.778e-09 2.631e-08 0.28° -178.93°
9 9.000e+03 2.444e-09 2.314e-08 0.22° -178.99°
Total Harmonic Distortion: 0.003393%(0.003166%)
100mv into 55ohms load (Like My AKG 240 , Its too loud)
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.025e-01 1.000e+00 179.07° 0.00°
2 2.000e+03 3.260e-05 3.182e-04 -81.50° -260.57°
3 3.000e+03 3.127e-07 3.052e-06 -154.72° -333.78°
4 4.000e+03 4.973e-08 4.854e-07 3.99° -175.07°
5 5.000e+03 4.028e-08 3.931e-07 0.08° -178.99°
6 6.000e+03 3.350e-08 3.270e-07 0.05° -179.02°
7 7.000e+03 2.868e-08 2.799e-07 0.05° -179.02°
8 8.000e+03 2.506e-08 2.446e-07 0.04° -179.02°
9 9.000e+03 2.224e-08 2.171e-07 0.05° -179.02°
Total Harmonic Distortion: 0.031817%(0.031790%)
100mv into 62ohms load (Like My AKG 702 , Its too loud)
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.029e-01 1.000e+00 179.09° 0.00°
2 2.000e+03 2.736e-05 2.659e-04 -81.95° -261.03°
3 3.000e+03 2.541e-07 2.470e-06 -152.62° -331.70°
4 4.000e+03 4.329e-08 4.207e-07 3.46° -175.63°
5 5.000e+03 3.494e-08 3.396e-07 0.08° -179.01°
6 6.000e+03 2.906e-08 2.824e-07 0.05° -179.03°
7 7.000e+03 2.487e-08 2.417e-07 0.05° -179.04°
8 8.000e+03 2.173e-08 2.112e-07 0.05° -179.04°
9 9.000e+03 1.928e-08 1.874e-07 0.03° -179.05°
Total Harmonic Distortion: 0.026591%(0.026557%)
50mv is more reasonable for AKG K240 and AKG 702
Let See result for that
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 5.145e-02 1.000e+00 179.09° 0.00°
2 2.000e+03 6.841e-06 1.330e-04 -81.76° -260.85°
3 3.000e+03 1.584e-08 3.078e-07 -112.88° -291.97°
4 4.000e+03 2.196e-08 4.268e-07 0.47° -178.61°
5 5.000e+03 1.759e-08 3.418e-07 0.05° -179.04°
6 6.000e+03 1.464e-08 2.846e-07 0.04° -179.04°
7 7.000e+03 1.255e-08 2.438e-07 0.07° -179.02°
8 8.000e+03 1.097e-08 2.133e-07 0.07° -179.02°
9 9.000e+03 9.747e-09 1.894e-07 0.07° -179.02°
Total Harmonic Distortion: 0.013298%(0.013270%)
Lt spice sim attached below
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 2.662e+00 1.000e+00 179.23° 0.00°
2 2.000e+03 1.809e-03 6.794e-04 153.37° -25.86°
3 3.000e+03 9.733e-04 3.656e-04 -111.12° -290.35°
4 4.000e+03 2.265e-04 8.508e-05 -1.85° -181.08°
5 5.000e+03 8.629e-05 3.241e-05 78.25° -100.98°
6 6.000e+03 2.891e-05 1.086e-05 167.43° -11.80°
7 7.000e+03 1.071e-05 4.023e-06 -106.06° -285.29°
8 8.000e+03 3.943e-06 1.481e-06 -18.90° -198.13°
9 9.000e+03 1.500e-06 5.636e-07 68.17° -111.06°
Total Harmonic Distortion: 0.077697%(0.077687%)
1vpp into HiFiman HE560 [I plan to own in future] , 45ohms load
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.014e+00 1.000e+00 179.01° 0.00°
2 2.000e+03 4.603e-03 4.537e-03 -81.17° -260.18°
3 3.000e+03 5.649e-04 5.569e-04 -161.45° -340.46°
4 4.000e+03 6.193e-05 6.105e-05 101.54° -77.48°
5 5.000e+03 9.399e-06 9.265e-06 17.13° -161.88°
6 6.000e+03 1.656e-06 1.633e-06 -34.11° -213.13°
7 7.000e+03 8.824e-07 8.699e-07 -1.98° -181.00°
8 8.000e+03 8.799e-07 8.674e-07 1.12° -177.89°
9 9.000e+03 7.843e-07 7.732e-07 0.10° -178.92°
Total Harmonic Distortion: 0.457174%(0.457172%)
250mv into 250ohms load (Like Beyerdynamic DT770 Pro)
[ Enough to fry my ear cannot say about other people]
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 2.640e-01 1.000e+00 179.21° 0.00°
2 2.000e+03 2.243e-05 8.497e-05 -105.19° -284.40°
3 3.000e+03 1.127e-06 4.270e-06 -131.96° -311.16°
4 4.000e+03 2.594e-08 9.827e-08 16.16° -163.05°
5 5.000e+03 1.079e-08 4.088e-08 3.03° -176.18°
6 6.000e+03 8.707e-09 3.298e-08 0.29° -178.92°
7 7.000e+03 7.393e-09 2.800e-08 0.26° -178.94°
8 8.000e+03 6.381e-09 2.417e-08 0.27° -178.94°
9 9.000e+03 5.585e-09 2.115e-08 0.27° -178.93°
Total Harmonic Distortion: 0.008508%(0.008407%)
100mv into 250ohms load (Like Beyerdynamic DT770 Pro)
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.056e-01 1.000e+00 179.21° 0.00°
2 2.000e+03 3.582e-06 3.392e-05 -105.05° -284.26°
3 3.000e+03 6.783e-08 6.423e-07 -127.86° -307.07°
4 4.000e+03 6.054e-09 5.733e-08 1.89° -177.32°
5 5.000e+03 4.577e-09 4.334e-08 0.26° -178.95°
6 6.000e+03 3.784e-09 3.583e-08 0.27° -178.93°
7 7.000e+03 3.211e-09 3.041e-08 0.24° -178.96°
8 8.000e+03 2.778e-09 2.631e-08 0.28° -178.93°
9 9.000e+03 2.444e-09 2.314e-08 0.22° -178.99°
Total Harmonic Distortion: 0.003393%(0.003166%)
100mv into 55ohms load (Like My AKG 240 , Its too loud)
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.025e-01 1.000e+00 179.07° 0.00°
2 2.000e+03 3.260e-05 3.182e-04 -81.50° -260.57°
3 3.000e+03 3.127e-07 3.052e-06 -154.72° -333.78°
4 4.000e+03 4.973e-08 4.854e-07 3.99° -175.07°
5 5.000e+03 4.028e-08 3.931e-07 0.08° -178.99°
6 6.000e+03 3.350e-08 3.270e-07 0.05° -179.02°
7 7.000e+03 2.868e-08 2.799e-07 0.05° -179.02°
8 8.000e+03 2.506e-08 2.446e-07 0.04° -179.02°
9 9.000e+03 2.224e-08 2.171e-07 0.05° -179.02°
Total Harmonic Distortion: 0.031817%(0.031790%)
100mv into 62ohms load (Like My AKG 702 , Its too loud)
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.029e-01 1.000e+00 179.09° 0.00°
2 2.000e+03 2.736e-05 2.659e-04 -81.95° -261.03°
3 3.000e+03 2.541e-07 2.470e-06 -152.62° -331.70°
4 4.000e+03 4.329e-08 4.207e-07 3.46° -175.63°
5 5.000e+03 3.494e-08 3.396e-07 0.08° -179.01°
6 6.000e+03 2.906e-08 2.824e-07 0.05° -179.03°
7 7.000e+03 2.487e-08 2.417e-07 0.05° -179.04°
8 8.000e+03 2.173e-08 2.112e-07 0.05° -179.04°
9 9.000e+03 1.928e-08 1.874e-07 0.03° -179.05°
Total Harmonic Distortion: 0.026591%(0.026557%)
50mv is more reasonable for AKG K240 and AKG 702
Let See result for that
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 5.145e-02 1.000e+00 179.09° 0.00°
2 2.000e+03 6.841e-06 1.330e-04 -81.76° -260.85°
3 3.000e+03 1.584e-08 3.078e-07 -112.88° -291.97°
4 4.000e+03 2.196e-08 4.268e-07 0.47° -178.61°
5 5.000e+03 1.759e-08 3.418e-07 0.05° -179.04°
6 6.000e+03 1.464e-08 2.846e-07 0.04° -179.04°
7 7.000e+03 1.255e-08 2.438e-07 0.07° -179.02°
8 8.000e+03 1.097e-08 2.133e-07 0.07° -179.02°
9 9.000e+03 9.747e-09 1.894e-07 0.07° -179.02°
Total Harmonic Distortion: 0.013298%(0.013270%)
Lt spice sim attached below
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Zen Master Basho was probably a contemporary of Zen Master Hakuin?
Basho
Hakuin
Now we need a small quiet no-noise Zen-like power supply for these simple SE Class A amps. A small 400mA SLB could be made using TO220’s and we can call it Nirodha - one of the Four Noble Truths - cessation (of noise). 🙂
Basho
Hakuin
Now we need a small quiet no-noise Zen-like power supply for these simple SE Class A amps. A small 400mA SLB could be made using TO220’s and we can call it Nirodha - one of the Four Noble Truths - cessation (of noise). 🙂
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Hi X,
Yes Zen Master Basho was from same era as Zen Master Hakuin.
It will be nice if we can make SLB power supply like Lego.
I initially thought of using lots of cascaded 2sk209gr but it will be big so i ended up adding mosfet to grow some muscle.
Yes Zen Master Basho was from same era as Zen Master Hakuin.
It will be nice if we can make SLB power supply like Lego.
I initially thought of using lots of cascaded 2sk209gr but it will be big so i ended up adding mosfet to grow some muscle.
I did built one channel on Vero board with IRF610, If i do another and test it out , i will post it here.
@DontHertzMe I did built it and i forgot test it out.
I was showing Sine Wave Amplification but i didnt check it further
I was showing Sine Wave Amplification but i didnt check it further