I seted bias by mistake at 10mA per BJT o/p transistor and did measurement - and it was same as with 100mA bias. Soundwise I do not know what would be the diffrence.
So BJT do not need high bias anyway to run properly.
So BJT do not need high bias anyway to run properly.
Borys could you do the test on your BG1-BJT and tell us if you seen sound modifications?
Marc
During music listening session i spend a little time with eagle to give a face to +/-50V 2BJT version...see attached. There is 2 versions : one with To264 devices (MJL) and one with TO3P (NJW)
Marc
Marc
Attachments
I will try to spend some time this week, currently I was working on some smaller simpler amp but it is finished up so will have some spare hrs.
Regards
Mine will be more 3BJT version as i have good stock matched MJL3281/1302....Board size is 150x86mm
Attachments
That was exactly the intention from the very beginning, strong competition between all kinds of VSSA iterations, no room left for blameless ideas. 
That was exactly the intention from the very beginning, strong competition between all kinds of VSSA iterations, no room left for blameless ideas.
Hehe im still wondering why the complex honey badger could get into the sticky. Two of them. It should be good but too complex for me.
Idefixes, maybe is not bad to change the following things on the PCB:
This is what I have noticed at first glance. Maybe there is still room for improvement.
edit: Also, 22K resistor (part of CCS) should go to GND, not to GND1?
BR,
Boban
An externally hosted image should be here but it was not working when we last tested it.
This is what I have noticed at first glance. Maybe there is still room for improvement.
edit: Also, 22K resistor (part of CCS) should go to GND, not to GND1?
BR,
Boban
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Coupling cap ground
Nice layout Marc. However, I wonder if the 100uf power supply caps ground should be better connected to GND than GND1? Or connect to GND1 before meeting 2200uf feedback caps gnd trace connection? Like a star connection for parts that connect to GND1.
Thanks
Fab
Nice layout Marc. However, I wonder if the 100uf power supply caps ground should be better connected to GND than GND1? Or connect to GND1 before meeting 2200uf feedback caps gnd trace connection? Like a star connection for parts that connect to GND1.
Thanks
Fab
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Hi boban, i though to this configuration but this configuration let a bit room to plug signal connector(room due resistor). With you mod. signal connector is direct to 4u7 and his boring...my finger are not really thin...Idem for cap : when ripping to install cap. trimmer is direct near faston plug so not confortable to adjust bias....
Marc
Marc
Yes you are FAST! but I would even connect the 2200uf caps gnd with a separate track directly to GND1.
Fab
