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
I would be interested in an explanation why it is useful that Papa connected the R5 in BBA-3 not to ground but together...?
Would you not want to be able to drive it with single-ended input?
Would you not want to be able to drive it with single-ended input?
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
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Would you not want to be able to drive it with single-ended input?
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
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
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.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.
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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