Not really.Should be called electrolytic-capacitor-less.
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Strange, i dont receive any letter.I did write to Nazar guess he's busy. Didn't get a reply
Really? Then show me the same.Those PS are usual
yesShould be called electrolytic-capacitor-less.
Excellent(if properly calculated, build and PCB traced) compared to BG, Nichicons, Elnas etcCurious though on how it sounds.
PSU for High end audio without electrolytic capacitors - English - Black Gate capacitors Cerafine Electrolytic electronic capacitor Nichicon power supply Pureism Silmic - Nazar audio innovations
http://www.diyaudio.com/forums/blog...nd-audio-without-electrolytic-capacitors.html
I don't get the "capacitorless" term. Those PS are usual, followed by shunt-type ones on analog section, with plenty of capacitors.
I agree. I don't see what that constant current shunt at the constant voltage does, that a resistor couldn't do cheaper?
jd
he-he 0.2ohm resistor with 15v regulator, that a resistor couldn't do cheaper?
he-he 0.2ohm resistor with 15v regulator
?? If I read the circuit correct, the transistor shunt takes about 2mA from the 15V (if it is 15V). A 7.5k resistor does the same.
jd
not correct. Remember Ohm's law at least. And there is formulas to calculate properly.If I read the circuit correct, the transistor shunt takes about 2mA from the 15V (if it is 15V). A 7.5k resistor does the same.
And output impedance of this circuit is 0.1-0.2ohm
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he-he 0.2ohm resistor with 15v regulator
In this web page:
PSU for High end audio without electrolytic capacitors - English - Black Gate capacitors Cerafine Electrolytic electronic capacitor Nichicon power supply Pureism Silmic - Nazar audio innovations
I read:
R2=(1,25-Ueb) / (0.3/Uout)+Iload
where Uout-output voltage V, Ueb-emitter-base voltage VT1, VT4 V, Iload- load current А.
A resistor usually has dimension in Ohm
In the above formula which is the R2 dimension?
R2 = V / (A/V) + A has not Ohm dimension (Ohm = V / A)
What is 0.3?
And which is 0.3 dimension?
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not correct. Remember Ohm's law at least. And there is formulas to calculate properly.
And output impedance of this circuit is 0.1-0.2ohm
Yes you're right, it depends on R2 doesn't it. The 2mA is for the first transistor. What's the value of R2?
Did you check the output Z of the circuit without the shunt, just the 317?
According to the data sheet, it's 0.02 ohms up to 10kHz.
jd
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I don't want to get into arguments, I apreciate your work, but I think you didn't invented the shunt-regulated PS. Or capacitance multiplication filtration schematics. I saw those first time in '80's when i started playing with electronic schematics ( I think even "Radio" had a few published - if you are old enough to remember).Really? Then show me the same.
Capacitance multiplier - Wikipedia, the free encyclopedia
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Looking again at the circuit, the shunt transistor is a small signal type with probably 600mW max dissipation. For say 500mW at 15V, that puts the shunt current at around 33mA, plus 2mA for the first transistor so say 35mA total.
The voltage across R3 is 1.2V, so across R2 we have 0.6V at 35mA so ballpark figure for R2 would be some 170 ohms.
Does that look sensible?
jd
The voltage across R3 is 1.2V, so across R2 we have 0.6V at 35mA so ballpark figure for R2 would be some 170 ohms.
Does that look sensible?
jd
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OhmIn the above formula which is the R2 dimension?
R2 = V / (P/V)+AR2 = V / (A/V) + A has not Ohm dimension (Ohm = V / A)
Max Power dissipation of 547\557 (at 70-80 amb/ temp)What is 0.3?
And which is 0.3 dimension?
yes, he has (as any NFB regulator) inductive output impedance, that is output current dependent (as output noise)Did you check the output Z of the circuit without the shunt, just the 317?
Its not a shunt type regulator and dont have cap. multiplication, look carefully.I don't want to get into arguments, I apreciate your work, but I think you didn't invented the shunt-regulated PS. Or capacitance multiplication filtration schematics. I saw those first time in '80's when i started playing with electronic schematics ( I think even "Radio" had a few published - if you are old enough to remember).
Advantages of this schematic is
-no electrolitycs and it problems
-low and stable(resistive) output impedance
-Perfect transient response (Series regulator(317\337) is completely detached from load)
-High ripple rejection and low noise
-No dependence noise-output current, output impedance-output current
-no global nfb
Disadvantages
-Efficiency
Ohm's law R=U\I ... 17ohmsso across R2 we have 0.6V at 35mA so ballpark figure for R2 would be some 170 ohms.
R2=(1,25-Ueb) / (0.3/Uout)+Iload
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R2= V / (P/V)+A = V / ((V * A) / V) + A = V / A + A has not Ohm dimensionOhm
In the above formula which is the R2 dimension?
R2 = V / (A/V) + A has not Ohm dimension (Ohm = V / A)
R2 = V / (P/V)+A
perhaps you mean
R2= V / ((P/V)+A) = V / (((V * A) / V) + A) = V / (A + A) = V / A which has Ohm dimension
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