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Old 19th February 2013, 11:12 PM   #381
Rush is offline Rush  United States
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Quote:
Originally Posted by Zen Mod View Post
think Vgs for mosfet based one , and think Vbe for bjt based one

there is nothing wrong in some reading , Greedy Boyz

Time is the thing wrong with reading. I don't have enough, can't remember from one year to the next anyway.

Trying to learn Linux for Raspberry PI. Greedy boy, wants it spoon fed.

Just want a good sounding reg/multiplier without learning how to design one. Asking questions, I do learn somethings, going to forget a year later if I don't need it again.

So, there you have it.

Rush
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Old 19th February 2013, 11:15 PM   #382
tinitus is offline tinitus  Europe
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I think zenmod is getting sleepy

kean K-multiplier have a led flashing on power up, to protect transistors
but it also results in completely noise free power on/off function
its really cool

would something similar be possible with Juma's multiplier ?
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Old 19th February 2013, 11:29 PM   #383
Zen Mod is offline Zen Mod  Serbia
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no need for that Tinitus

whatever -= cap multi is what it's name is saying - it's multiplying cap value ( connected to base/gate) by part's intrinsic amplifying factor ( beta/xconductance ratio) , so it's elegant ripple remover

it's not replacement for Jules ( so it's wise to have substantial capacity after , for harder loads ) but in cases where approx. 4V shave of PSU voltage (remember Ube or Ugs ? ) is welcome , putting one is clever thing

almost as when Mickey Mouse took 4 flies with one stroke
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Old 19th February 2013, 11:32 PM   #384
tinitus is offline tinitus  Europe
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getting sleepy, good night, thanks zenmod
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Old 20th February 2013, 10:55 AM   #385
juma is offline juma  Germany
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Quote:
Originally Posted by tinitus View Post
...would something similar be possible with Juma's multiplier ?
How do you know that it already doesn't do that ?
It's a variant of standard MOSFET cap multiplier, known here since Zen3 article. It is slow-start by default because it takes time to charge the cap that polarizes the gate of the MOSFET. That amount of time (RC constant) is defined by the value of the said capacitor and the value of the resistor that connects the drain and the gate.
I'm sure that everyone here already knows that, but thinking seems to be even harder task than reading...
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Old 20th February 2013, 03:12 PM   #386
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Default Second version of this amp

Speaking of reading, there is a second version of this amp on the second page of the diyaudio.rs thread (and at least one modification described farther along in that thread). It takes a little imagination to read using Google translate. From what I can tell the second is more difficult to set up.
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Old 20th February 2013, 03:19 PM   #387
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by juma View Post
I'm sure that everyone here already knows that, but thinking seems to be even harder task than reading...
thanks, good info, softstart function is nice feature
nice to know how it works, and where to find it

no, I dont read/understand very well, sorry
unfortunately a handycap I have
but Im used to it


[QUOTE=Rush;3376564]
Quote:
Originally Posted by permaneder View Post

You are using a different regulator than Juma's, see below.
What is the advantage of your regulator over Juma's?

Rush
hey, Rush, I notice it now, that curcuit you show there is not the one Juma is suggesting
his is with complementary pair
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Old 20th February 2013, 03:42 PM   #388
Rush is offline Rush  United States
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[QUOTE=tinitus;3378222]
Quote:
Originally Posted by Rush View Post

hey, Rush, I notice it now, that curcuit you show there is not the one Juma is suggesting
his is with complementary pair
It is from the second page of the original diyaudio.rs thread.

Rush
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Old 20th February 2013, 03:47 PM   #389
tinitus is offline tinitus  Europe
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[QUOTE=Rush;3378227]
Quote:
Originally Posted by tinitus View Post

It is from the second page......
I was looking at 1. post, directing to original article on other forum (sorry, cant read what it says )
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Old 20th February 2013, 04:11 PM   #390
juma is offline juma  Germany
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Quote:
Originally Posted by tinitus View Post
...no, I dont read/understand very well, sorry
unfortunately a handycap I have
but Im used to it
....

Hmmm... Nice ecxuse, but it won't get you off the hook, you'll have to come up with something more convincing ...

Last edited by juma; 20th February 2013 at 04:13 PM.
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