The simplistic Salas low voltage shunt regulator

[pchw]

You looked at the wrong thread. See first post here
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[Jenyok]

This is one more variant of scheme.

[Salas]

Priviet. It could be nice if you like chip regulators. Make one and then compare some of those discrete ones described here in your sound system. It should be the right experiment.

[Jenyok]

Salas
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Similar schemes is used for HI-FI audio in Russia.
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Left LM317 is used as a parametric (sequential) stabilizator with low noise, additional R5 - 0.1 Ohm, manual change C6 - 470 uF, additional C2 - 470uF, C3 - 0.47 uF .
Right LM317 is used as a current source (current generator) about ~170 mA.
OP AMP and n-MOSFET is used as a parallel stabilizator, max ~150-160 mA is stabilized.
MC7805 is a stabilized high quality voltage source with capacotors filter on out of chip.
R1 must be 6.8 Ohm - 10 Ohm, 2 Watts.

[Salas]

Question remains. Which one is better for sound? Make one like you do in Russia with chips, see its absolutely stable, then make SSLV1.1 for instance. Compare in system. Ears will speak the pravda.

[Jenyok]

One more similar scheme.
Russian magazine "Radio" №7, 1986 year, page 61 .

[Salas]

Interesting. Why so much input ΒΟΛΤ for 15 ΒΟΛΤ? Does it explain?

[Jenyok]

Salas
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Transistors VT4, VT8 and VT5, VT10 are the current source (current generator).
Transistors VT10, VT11 are parallel (shunt) stabilizator (regulator).
VD4, VD5 are the parametric (sequential) stabilizator for VT10, VT11.
VT6, VT7 are current source (current generator) for parametric (sequential) stabilizator on VD4, VD5.
VD2, VD3 Zener 6.2V, VD4, VD5 Zener 15V .
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Stabilized voltage +-15V, max current is about ~60-100 mA.

[Salas]

No error amp loop though? Just following the Zeners?

[Jenyok]

Salas
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Yes, just following the Zeners for VT10, VT11.