OK, I see it nowHiFiNutNut, Thanks for sharing your experiences. You might find this interesting ....
http://www.pinkfishmedia.net/forum/showthread.php?t=21574&highlight=regulator
http://www.pinkfishmedia.net/forum/showthread.php?t=21574&highlight=regulator
I thought it interesting too. And tried it out. And built the other Teddy regs. And no, none of them can compare IME to a well built Jung super reg. Or to a nice shunt. Then again i don't use Naim equipment and am mostly immune to net-buzz 🙂
I've not built that particular circuit, but I've applied the principle to another regulator and found it very effective.
Hi analog_sa
That thread is based on the Jung Super Regulator.
So what do you mean by "WELL BUILT" Jung regulator?
Are you suggesting everyone on pinkfish do not know how to make a "well built" Jung regulator.
Anyway I reckon Salas shunt reg is the best I have seen.
That thread is based on the Jung Super Regulator.
So what do you mean by "WELL BUILT" Jung regulator?
Are you suggesting everyone on pinkfish do not know how to make a "well built" Jung regulator.
Anyway I reckon Salas shunt reg is the best I have seen.
Far from it. Although i doubt that everyone has indeed built a (non-oscillating) Jung reg and done comparisons.
Thanks for the link. I had read it before I built my JSR. The problem for me is that the time for me to take out the TPR and put a C-Multiplier in front of it would be the same as building a Salas v1 shunt reg. I am now interested in giving the second one a go.
A C-Multiplier may make things simplier so may make the sound better. But the output impedance would be even higher than the TPR.
Regards,
Bill
A C-Multiplier may make things simplier so may make the sound better. But the output impedance would be even higher than the TPR.
Regards,
Bill
If I were to use a C-Multiplier, and if it does not resonate, I would still add a large low impedance capacitor, plus a 10uF film cap, plus a 0.1uF film cap, after the C-multiplier and before the JSR. In that case, at higher frequencies it betters the LM317/337 tracking pre-regulator. Yes I guess it may sound better.
By the way, if you would like to do the "film cap" mod, please don't copy the resistor values I gave earlier. As you may know that the resistors I chose are still considered not high at all for the JFET opamps. This is only because my load is OPA627 that has a solid 120dB PSSR below 100Hz, and I made the -3dB frequency a bit higher at 6.6Hz than the original 3.19Hz. If your load has lower PSSR, you should scale up the resistors more.
By the way, if you would like to do the "film cap" mod, please don't copy the resistor values I gave earlier. As you may know that the resistors I chose are still considered not high at all for the JFET opamps. This is only because my load is OPA627 that has a solid 120dB PSSR below 100Hz, and I made the -3dB frequency a bit higher at 6.6Hz than the original 3.19Hz. If your load has lower PSSR, you should scale up the resistors more.
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analogu_sa,
The schematic you posted in #14 is the simplest opamp based shunt reg I could imagine! Is it the one called syn08? Would you mind posting the link? My guess is that the slightly more sophisticated Sala v1 would sound better. But you obviously compared that simple shunt reg with JSR, and you said that you liked both the JSR and the simple shunt.
By the way, the schematic you posted is obviously opamp based. But in your note it was MOSFET.
Regards,
Bill
The schematic you posted in #14 is the simplest opamp based shunt reg I could imagine! Is it the one called syn08? Would you mind posting the link? My guess is that the slightly more sophisticated Sala v1 would sound better. But you obviously compared that simple shunt reg with JSR, and you said that you liked both the JSR and the simple shunt.
By the way, the schematic you posted is obviously opamp based. But in your note it was MOSFET.
Regards,
Bill
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I'm currently building two ALWSR, and have a problem, sadly I'm unable to find a thread where I can ask this question, I hope noboby minds, that I ask this here.
I use a LT1086CT with R1 and R2 @1k, which the partslist say so. Strangely I get 3,6V output on both regs. I tried 215R and that's closer to 2,5V, which I'm trying to achieve.
Maybe the solution is really a stupid mistake of mine, but I'm still learning.
My source is a 9V wallwart.
Could anybody help, I'm really stuck.
Greetings Ava
I use a LT1086CT with R1 and R2 @1k, which the partslist say so. Strangely I get 3,6V output on both regs. I tried 215R and that's closer to 2,5V, which I'm trying to achieve.
Maybe the solution is really a stupid mistake of mine, but I'm still learning.
My source is a 9V wallwart.
Could anybody help, I'm really stuck.
Greetings Ava
Why don't you open a thread in the power supplies section, asking the questions. I would recommend that you post the schematic, or link to it, and some measurements at important points.
Until then, check that it doesn't oscillate. If you don't have an oscilloscope try listening to a radio set on AM. Bring it close to your regulator and search for noise that gets larger as you get nearer the regulator.
Until then, check that it doesn't oscillate. If you don't have an oscilloscope try listening to a radio set on AM. Bring it close to your regulator and search for noise that gets larger as you get nearer the regulator.
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