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Burning Amp BA-3b (Balanced)
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Old 9th October 2011, 07:48 PM   #31
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Burning Amp BA-3b (Balanced)
nope ;

make it balanced all the way , as mono amp .

it will "just" have option to feed it unbalanced ( with FE acting as unbal to bal converter)

off course - if you make an option to cut mutual R5 and introduce separate one for each half , then you can have 2ch amp in same case
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Old 9th October 2011, 09:12 PM   #32
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Originally Posted by Zen Mod View Post
it will "just" have option to feed it unbalanced ( with FE acting as unbal to bal converter)
that really is a great feature to have
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Old 9th October 2011, 09:36 PM   #33
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hey, zenmod

maybe you remember our small 'debate' about why F5 cannot have seperate input/'driver' supply (long time ago)

I suppose this one is different, yes ?
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Old 9th October 2011, 10:04 PM   #34
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Why ?
Looks like the same rail fluctuation problemo.
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Old 9th October 2011, 11:29 PM   #35
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ok
there are seperate onboard caps
no problem
'funny' ones tho
looks a bit like tube amp cathode bias
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Old 9th October 2011, 11:40 PM   #36
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Burning Amp BA-3b (Balanced)
now you are loosing me .....

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Old 9th October 2011, 11:56 PM   #37
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ok, they are 'just' reversing supply polarity to jfet then

1000uf, wonder if size and type is important then

but in paralel with bias pot ?
boy am I glad I dont have to understand it

from manual

Coming off the Drain of Q1 is the loading network of R6, C1 and P1, and there is a comparable network of R7, C2, and P2 attached to the Drain of Q2. R6 clearly sets the AC load for Q1, but the DC requirements to bias up Mosfet Q3 are higher than that, so P1 in parallel with C1 provides a higher resistance value below about 0.5 Hz, and gives the approximately 3 volt DC drop required to bias the Mosfets.

well, Nelson clearly said if you use the parts specified
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Old 10th October 2011, 12:15 AM   #38
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the 30kB Gif is easier on the eyes than the 16kB Png. The 59kB Png is capable of displaying far more detail, but for that schematic is a complete waste at 2550pixels wide.
For the record, I appreciate the utility of making the schematic 2550 pixels wide - it makes the text more readable when scaled down to fit your screen. In other words, more detail and resolution is useful. I merely pointed out that JPEG was blurring the fine detail needlessly, considering other formats are available that are better suited.

By the way, you all hopefully realize the irony of arguing that any file format is fine so long as the schematic is brilliant, when there are more people in this world who would laugh at us all and say that any amplifier is fine so long as it makes the music louder and some kind of sound comes out of the speaker.
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Old 10th October 2011, 12:27 AM   #39
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pixels
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Old 10th October 2011, 03:56 AM   #40
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these pixels are brilliant .

all of them .

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