loading resistor , which is mutual for two mirrored halves , increases symmetry of output signal .
ya know - usual mumbo jumbo - just think about any out of phase garbage ....... ;
- what's happening when each half have own separate loading resistor , connected to gnd ;
- what's happening when that resistor is mutual (R5) ....
😉
ya know - usual mumbo jumbo - just think about any out of phase garbage ....... ;
- what's happening when each half have own separate loading resistor , connected to gnd ;
- what's happening when that resistor is mutual (R5) ....
😉
Generg,
Here ya go. Found it looking into BA-3B possibilities before Nelson realeased it.
Distortion in JFET input stage circuits
Here ya go. Found it looking into BA-3B possibilities before Nelson realeased it.
Distortion in JFET input stage circuits
It seems this little trick of Nelson's does really well in reducing distortion. How does it compare to F5X. This will be my first non feedback amp, so I am stoked to hear a new sort of sound.
Thx buzzforb, interesting and nearly understandable....😀
To the sound of BA-3
I dare to say.....In my system the sound of BA-3 reminds me of good passive solutions.....the same "coherency". 🙂
To the sound of BA-3
I dare to say.....In my system the sound of BA-3 reminds me of good passive solutions.....the same "coherency". 🙂
who cares how it 'sounds' 😛
either you want to build it, or you don't
its probably ok 😀
anyway, its a matter what you need to drive your speakers
balanced looks sweet
either you want to build it, or you don't
its probably ok 😀
anyway, its a matter what you need to drive your speakers
balanced looks sweet
there is a dawn in my brain.....UGS 😛
there is a similarity to UGS 3a from Cheff if you put Q3 and Q4 to the outside, there is the source connection but no SUSY feedback, but with F5 there were some ideas......
thanks Mr. Nelson 😀
Attachments
Last edited:
it takes both SE and balanced signal ?
that would be real nice
but how ?
or will the balanced amp then 'just' be a stereo amp
well, thats kind of nice too
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
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
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 ?
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 ?
ok
there are seperate onboard caps
no problem
'funny' ones tho
looks a bit like tube amp cathode bias 😀
there are seperate onboard caps
no problem
'funny' ones tho
looks a bit like tube amp cathode bias 😀
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
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
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. 😛
