The simplistic Salas low voltage shunt regulator - Page 104 - diyAudio
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Old 21st August 2009, 02:40 PM   #1031
iko is offline iko  Canada
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Quote:
Originally Posted by jkeny View Post
So what he's using wouldn't be a fair comparison then with the SWenson HV?
You know the saying, all's fair in love and war (just kidding).

Quote:
That's quiet a range, Salas and goes to show that it doesn't rely on a particular device's performance in a limited range for it's operation - something to commend it highly!
The topology scales nicely, but of course some parts need to be changed for the different versions (HV for instance).

So, what do we have presently:
* easy to build: check
* high performance design: check
* all discrete parts: check
* favourable reports by independent builders: check
* not prone to oscillation (with reasonable care): check
* with some changes able to accommodate various operating parameters (voltage, current): check
* designed for low output impedance and low phase shift across the audio range and beyond: check
* freely available schematic and advice for diy purposes: check

Highly speculative possible future plans:
* kits for those who don't feel like getting their hands dirty
* micro-controller smarts for more efficiency (high current versions)
* ...

Have I missed anything?

P.S. Wow, does this ever sound like an infomercial
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Old 21st August 2009, 02:58 PM   #1032
Salas is offline Salas  Greece
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Quote:
Originally Posted by jkeny View Post
So what he's using wouldn't be a fair comparison then with the SWenson HV?
With Swenson yes, with what you are going to build for your T-Amp not truly indicative, a different enough circuit. Does not have an output capacitor for instance.
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Old 21st August 2009, 03:08 PM   #1033
jkeny is offline jkeny  Ireland
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Kewl, where do I sign

Seriously, an excellent project - full credit Salas & Ikoflexer for advancing it onwards & upwards. Maybe we should rename you Buzz Lightyear (to infinity & beyond)
Quote:
With Swenson yes, with what you are going to build for your T-Amp not truly indicative, a different enough circuit. Does not have an output capacitor for instance.
So the T-amp version (V1 or V1.5) would be superior to the ring of two version, OK! But is there a high voltage version of V1 or V1.5 from ikoflexer which could be compared against Swenson HV (apples with apples)?

Sorry for all the Q's guys - I'm probably coming late to this party & haven't been introduced around yet

Last edited by jkeny; 21st August 2009 at 03:15 PM.
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Old 21st August 2009, 03:20 PM   #1034
Salas is offline Salas  Greece
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Yes there is. The one he supplies his headphone DHT amp.

The ring of two is not technically highly targeted but it is well voiced and we maybe have some outsider favorite. We will see.
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Old 21st August 2009, 04:32 PM   #1035
iko is offline iko  Canada
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Quote:
Originally Posted by jkeny View Post
But is there a high voltage version of V1 or V1.5 from ikoflexer which could be compared against Swenson HV (apples with apples)?
Thanks

There is a HV prototype of v1.5 which I built and seems to work fine. Have a look in the other thread at post 412

http://www.diyaudio.com/forums/showp...&postcount=412

and pics in post 442

http://www.diyaudio.com/forums/showp...&postcount=442

I wanted regulated 150V at around 100mA, so that's what the prototype does. Post there if you want a specific voltage and current output because some parts may need to be changed.
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Old 24th August 2009, 05:58 PM   #1036
iko is offline iko  Canada
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Some people might find this interesting; shunt regulator with self-controlled shunt current level, US patent 5260644
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Old 24th August 2009, 10:05 PM   #1037
jkeny is offline jkeny  Ireland
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Thanks Iko, nice find - I haven't read it yet - are you using any ideas from it?
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Old 24th August 2009, 11:02 PM   #1038
iko is offline iko  Canada
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Originally Posted by jkeny View Post
Thanks Iko, nice find - I haven't read it yet - are you using any ideas from it?
Nope, the ideas in it are pretty much like we've talked about it here; what it really means for me is that the mechanism is patented and I won't be building one for sale, but I'll still try work on a version for diy and share it, as usual.
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Old 28th August 2009, 04:15 AM   #1039
iko is offline iko  Canada
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So, let's laugh together at another one of my simulated fantasies. Here's the psrr of a new regulator I'm working on, possibly v4. There is a RC filter before the regulator (R=60R, C=4700uF). The output impedance is not affected by the filter.

OK, we all know reality is not so, but hey, it's nice have a target.
Attached Images
File Type: png reg-v4n-mvmc-1a-psrr.png (12.4 KB, 563 views)
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Old 29th August 2009, 02:40 AM   #1040
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Default Shala Shunt 5V

Hi Salas and Ikoflexer !

I want use shal shunt for my DAC, out put +5v and -5v, but In my contry I dont fine 2SK170 and Bc550 in you cricuit Q2, Q5, Q6 = 2SK170, Q3 = BC550.
Aloso What transitor I can replaced 22SK170 and BC550???
Can you show for mee. Thank you very much
Dia thien thai
Best regarder

You can see in cricuit

Last edited by dia thien thai; 29th August 2009 at 02:44 AM.
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