Choky Susy F3 for LU1014's

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Magura

Magura

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Joined 2003
class-a-labs.com
mithomas said:



Sweet. Thanks This is what I am talking about. Bigger IS better - although I almost always listen through lowthers as a mid-range.
I have some bonded 12 X 12" X 4" fin heatsinks that I can see what they will disappate. Getting the IRON may be the expensive and hard part, if I can't just buy a few.
I do need a bigger variac to play here.
Click to expand...


Some heatsinks, as in 8?


No need for a variac, just run it the no fear way, flick the switch :D

I tend to do it like this, simply because this way keeps me on my toes, so I do it right first time, I get sloppy if I see a chance to test without consequences. :xeye:


Magura :)
 
Magura

Magura

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Re: Re: Re: just another variation .... Magura like ;)

Zen Mod said:



Magura is lazy ............. and I won't tell ya why having neg is good .......


....... not having input caps isn't main reason


:rofl:
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Magura is not lazy, Magura tells fluffy serb why neg rail is bad. :rofl:


I have a thing against dual supply with 2 different voltages, as high power trafo's are big and expensive. Same goes for caps.....things just grows huge and very expensive.

For low power applications, I agree, no problem with a couple of voltages.

Magura:)
 
metalman

metalman

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Joined 2003
EUVL said:
If you would forgive me :

1) It depends on what your definition of Super Symmetry is. As it is the proposed schematics is basically 2 identical inverting amps joint at the frontend by a current course to form a diff pair. But there is no cross feedback, as in the Pass patent.

Patrick
Click to expand...

If I understand Susy correctly, this circuit meet the criteria. Have a closer look at the X-BoSoZ schematics. Papa confirmed it is Susy and the only connection between the two halves there is through the LTP.

More fuel on the debate fire!?!

Terry
 
steenoe

steenoe

Member
Joined 2004
Babowana said:
Sleepless night . . .

I hardly see the cross feedback (X-feedback).


Cheers,

>>:)<<
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Me too. The X is barely detectable, but if Papa says ok?

BTW On a side note, I have become stuck in my armchair, in front of the UP's, so I wont start building just yet


;)

BTW BTW I figure that a 2x18V trafo will do the supply voltages as proposed. Using the plus with the multiplier w/o zener will net you just under 20V for the pos. rail. Regulating the negative to some 10V is not unreasonable. A big'ish mosfet can dispose those 12-14V off, without blowing up:)
 
steenoe

steenoe

Member
Joined 2004
Magura said:



10V and let's be conservative and say 4A. As in 40W of heat for that little detail.


Magura :)
Click to expand...

:D Ya' right ofcourse, but saying "big'ish" mosfet. Having a few 123A industrial devices on hand, it didnt cause any concern. For the reg. you can use the biggest and dirty devices, that you have in drawer:) I even have some very much bigger devices, I will post a pic later, and hope someone can tell how to use those. They hardly need a heatsink for this app;)

:)
 
Zen Mod

Zen Mod

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Joined 2003
zenmod.in.rs/
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few thoughts from Migthy ZM

using special amps with mediocre HiFi spks is insane

so - special amps don't need insane dissipation

so - obtaining 7~10V of neg leg at 3A isn't insane

that's (just maybe) separate donut of 5-7V/100VA for bth channels , if both channels are in same case

benefits are - even if with superposed CCS-es - better CMRR and blahblah , comparing to single leg supply .


so - if you (any of you/us) want special amp ........... then do your homework and find/buy/build some special spks ........ not any ProAc clone or fluffy cheapest Fostex in easiest box drek .

Mighty ZM spoket ......


:rofl:
 
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