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Old 11th March 2009, 01:45 PM   #61
iko is offline iko  Canada
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Default Re: Simple opamp/mosfet shunt regulator

Originally posted by ashbytub
Is there P.C, board for your Shunt Regulator?
Ashby, I don't have a pcb board layout for the opamp version, but you'll find a few different variations on the salas discrete design that a few people are very happy with, earlier in this thread
Simplistic NJFET RIAA

If you're patient salas will provide a summary some time soon.

salas, you're right, how it came back to almost your first design; for me at least, the regulator I would build again right now is the discrete non-LED version, that I posted a bit earlier in this thread. I don't expect to change it again before the week-end, as I'm listening through it, so let's call this "sort of stable" version 1.0

Click the image to open in full size.

Note that the BC547C can be a BC550C of course.
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Old 11th March 2009, 02:00 PM   #62
Salas is online now Salas  Greece
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That is what I am talking about, so to avoid specific LEDS and current calculations through R1. Please email me, I want to fix that as a standard for 3 Voltages and I want you to check what I will do. My email is open through the forum.
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Old 11th March 2009, 06:18 PM   #63
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Originally posted by Bonsai
Whats your reference?
I've heard a lot of opamps, and I'm quite sure each and everyone of them has it's own flavor, like any other amplifier. LM4562 is one of the better, but it too has a flavor. If you think LM4562 is the last word in audio design, why do you keep hanging around at DIY places?

Regrding th e op-amp/discrete debate, I just hear too many stories about how bad op-amps compared to disretes to accept without questioning.
It's not a war, it's a strive for "the perfect sound".
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Old 12th March 2009, 11:03 AM   #64
Bonsai is offline Bonsai  Europe
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I've also heard many different op-amps and played and built circuits with them.

Like you, I also strive for the best . . . and th e LM4562 is certainly up there in my view.

If I over reacted to your post apologies from my side.


bonsai and DIY here
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Old 12th March 2009, 06:38 PM   #65
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Cheers to that .
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