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Old 6th October 2003, 08:25 AM   #51
Electrons are yellow and more is better!
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As I said before DIY'ers have something inside their heads and they usually use it. That my experience. Please give the big crowd DIY'ers credit, Fred.

Fred, have you never made a pcb for multi purpose? Mostly rather easy.
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Old 6th October 2003, 08:45 AM   #52
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Unhappy I guess you charge to fix them too....

I am not saying DIYs are not smart enough to build a kit. For PCBs this simlar with this many stuffing changes between the versions will make it more difficult for many to assemble, most people being unfamiliar with the design. It is the intellegence and responsibility of the person offering the kit and not that of the one purchasing it that is under discussion. Why make it more difficult for the person buying the board instead of doing the work for two versions which require small changes between the layouts?
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Old 6th October 2003, 08:59 AM   #53
Electrons are yellow and more is better!
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Default Re: I guess you charge to fix them too....

Quote:
Originally posted by Fred Dieckmann
Why make it more difficult for the person buying the board instead of doing the work for two versions which require small changes between the layouts?
I think you know the answer if you ordered one, two or even more different series of pcb's.
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Old 6th October 2003, 11:46 AM   #54
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There seem to be reasonable arguments both for one PCB and
for two separate ones, but wouldn't perhaps the most obvious
solution be one PCB with two regulators, one pos. and one neg.?
I mean, most people will probably want both anyway and it
would seem attractive to minimize the board count in a design.

Back to an earlier issue in the thread, does anybody have a
good answer to dimitris question (post #26) on how to feed
multiple ICs from one regulator. I share the same concerns as
dimitri regarging Per-Anders answer to the question, so other
opinions would be welcome.
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Old 6th October 2003, 12:05 PM   #55
Electrons are yellow and more is better!
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Quote:
Originally posted by dimitri
Peranders, as we use 10-100 ohms + 47-470 uF// 100nF (corner frequency 3-300Hz) why we need super regulator with milliohms in wide frequency range? We will lose the most of it strength.
A One regulator for each IC

B One regulator for all IC and all IC's connected low-ohmish together

C One regulator for all IC but all IC's separated with

C1 R+C

C2 L+C

C3 Murata-filter plus C

C4 L+R+C

C5 ?????

What do the experts say?

If anyone suggests C, why do we need this regulator? Good point Dimitri.

How many amps have PS which delivers less then 1 uV noise?

Have many amps MUST have power with less noise than 1 uV in order produce high fidelity?

How many people think it's cool to have a super regulator?
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Old 6th October 2003, 12:12 PM   #56
Electrons are yellow and more is better!
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Quote:
Originally posted by Christer
There seem to be reasonable arguments both for one PCB and
for two separate ones, but wouldn't perhaps the most obvious
solution be one PCB with two regulators, one pos. and one neg.?
I mean, most people will probably want both anyway and it
would seem attractive to minimize the board count in a design.
Nothing stops Andy to make them pos, neg in the same board except for that the cooling arrangement must be different.
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Old 6th October 2003, 07:08 PM   #57
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Unhappy I wish I was that smart...........

"Nothing stops Andy to make them pos, neg in the same board except for that the cooling arrangement must be different."

I think you had better ask Andy about his layout and Jan Didden about his layout for the Jung regulator. I really think you don't have any experience with the circuit and are very likely unqualified to make that judgment. I am constantly amazed that someone thinks they can look at a circuit for few hours and know more than people who have been working with the circuit for years. There a very few on the forum who are that sharp, I'm sure not one of them. My views on the circuit are based on following the design since the Sulzer original in 1980. Does anyone know what "delusions of grandeur" is in Svensk ? Is "storhetsvansinne" close?
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Old 6th October 2003, 07:24 PM   #58
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Hi guys.

First, want to try to clear something up.

Andy IS making a positive and negative version of the Jung regulator. He appears to have two different PWB's.

The misunderstanding came from my stupidity , I missed it in the user's manual. It was really that I was careless, and I have no excuse for it.

Very sorry for any and all confusion I caused here.

Secondly, thanks to all for the answers/replies to my questions. I had not idea they would be a cause of controversy, but I really appreciate the time people took to answer me.

As for my project, Andy is sending me a positive and negative version of his kit, so I will build each one up, and use it to power my preamp. I might make another pair in the future, so I can go dual mono.

I will go with a split core tranny, and probably use Nichicons for the PS filter caps, and freds for the bridge diodes. Budget is of some concern, but time is a bigger issue for me. I would rather spend a little more up front, so I won't have to tweak it latter to try to make it better.

I am still not sure how much filter capacitance to put in my preamp, but I have a scope, so I can play with that, and see if I get any oscillation.

Thanks/sorry,
Randy
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Old 6th October 2003, 07:25 PM   #59
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Dear Christer and Peranders,
This is how I test regulator dynamic behavior from the output side during last 20 years. May I recommend you to do the same with any regulator, starting from three transistors types to precision one. You will be astonished and will forget about dc uV and use Peranders C.
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Old 6th October 2003, 07:34 PM   #60
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Quote:
Originally posted by dimitri
Dear Christer and Peranders,
This is how I test regulator dynamic behavior from the output side during last 20 years. May I recommend you to do the same with any regulator, starting from three transistors types to precision one. You will be astonished and will forget about dc uV and use Peranders C.

Of course you are astonished. You thought you were measuring the regulator, but in effect you have been checking the dynamic impedance of a cap with parallel inductance with DC offset. 20 years you said?

Jan Didden
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