Any advantage to make dual mono (PSU) for the gainclone (I'm ordering Brian GT's kit) - Page 2 - diyAudio
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Old 3rd April 2004, 04:29 PM   #11
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My stature isn't big enough either, that's why I quoted 47Labs
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Old 3rd April 2004, 04:31 PM   #12
grataku is offline grataku  United States
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Quote:
Originally posted by BrianGT


I don't see how it would add more power, unless the initial transformer was underpowered for 2 channels. Would using seperate secondaries (4 windings) on a larger transformer have the same effect as dual mono?

I have a 1kVA 4x25vac transformer that I was going to use for my bridgeclone.

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The same transformer core won't allow that perfect separation that two different cores, separate power cords, and separate power generators and electrical lines to your house would afford, by, IMO, it'll do.
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Old 3rd April 2004, 08:27 PM   #13
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Quote:
Originally posted by grataku
[B]I happen to think that dual mono with separate GNDs and balanced operation...
Over my head technically. How does balanced operation relate to dual mono?

I am planning to go 95% dual mono, with the only common item being the 120VAC feed, and I will be using a 20A outlet for that to decouple as much as possible.
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Old 3rd April 2004, 10:18 PM   #14
metha is offline metha  Thailand
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I just read the Steven's review in the enjoythemusic.com that he prefered only one Humpty (instead of two as the complete dual mono).

Peter D. - Any comments from you as one of the ChipAmp experts ?



PS: I already bought two of (18-0-18V, 180VA, US$14 each) toroidal transf for my first NIGC (4 Ohm speakers).
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Old 3rd April 2004, 11:26 PM   #15
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Quote:
Originally posted by metha


Peter D. - Any comments from you as one of the ChipAmp experts ?

Grataku may be wrong after all
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Old 3rd April 2004, 11:44 PM   #16
metha is offline metha  Thailand
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Quote:
Originally posted by Peter Daniel


Grataku may be wrong after all
What does the "Grataku" mean?

BTW, Peter, I wonder why your AMP1 don't be 25W? Do you have plan to put a DC speaker protector into your futuer amp?
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Old 4th April 2004, 01:10 AM   #17
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Grataku is a forum member who made previous comments.

Why would it be 25W if it can be 50W?

I don't think DC speaker protector is necessary in a well designed (op) amp. The initial units had the coupling caps at the input, but later we were not installing those (for pure listening satisfation).
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Old 4th April 2004, 01:27 AM   #18
metha is offline metha  Thailand
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Peter,

Thanks for the definition of "Grataku" ( new word for me today!)

Quote:
Why would it be 25W if it can be 50W?
IMHO, running the chip at 50W may be too high, the SPIKE protection might be activated, partcularly, if the speaker impedence drop under 8Ohm at some frequncy (re: the datasheet).


Quote:
I don't think DC speaker protector is necessary in a well designed (op) amp. The initial units had the coupling caps at the input, but later we were not installing those (for pure listening satisfation).
uhm.... , the price of speakers is expensive, that's why I prefer to be on the safe-side. Do you mean if there is a coupling cap (1.0-4.7UF) it's safe/very low possibility to have dangerous DC voltage at output (even we also obmit the cap in the feedback loop which ensure DC untiy gain) ??!

Note: I am a real newbie, pls be patient with my questions/comments.
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Old 4th April 2004, 03:30 AM   #19
grataku is offline grataku  United States
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Quote:
Originally posted by leadbelly


Over my head technically. How does balanced operation relate to dual mono?

It doesn't, just making a point.


Quote:
[i]Originally posted by Peter Daniel
Grataku may be wrong after all ;
Remember? There is no right or wrong _it's all subjective.
Anyway Peter, I like the Petek GC, is that tiger maple you use for the sides?
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Old 4th April 2004, 03:40 AM   #20
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I just thought it was an opportunity for a joke, but I really didn't mean it

It is Zebrawood and it gets much nicer when sealer (or oil) is applied. This Patek indeed deserves it's name, it is so cute and features almost watchmaking precision

But it's possible only with those chip amps. Rodd was listening and didn't dismiss it
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