I like that one also!
I’m not the guy to rank them, but M2 is unquestionably in competition for the top spot.
I’m not the guy to rank them, but M2 is unquestionably in competition for the top spot.
Heatsink
A little advice if I may
There are 6 devices per side running at around 0.43 amps per device so basically the same as the F5 but with 3x the output devices.
I’m hoping to use 2 PC heatsinks with fans and so will need to use a copper heat spreader.
My question is, do the left and right output devices have to be electrically separate or can all 12 share one heat spreader connected to both heatsinks?
A little advice if I may
There are 6 devices per side running at around 0.43 amps per device so basically the same as the F5 but with 3x the output devices.
I’m hoping to use 2 PC heatsinks with fans and so will need to use a copper heat spreader.
My question is, do the left and right output devices have to be electrically separate or can all 12 share one heat spreader connected to both heatsinks?
Attachments
as you drew it (phases, not going in details will you burn xformer secondary or not in that way) , you practically have M2 - xformer driving source follower OS
naah
F4 is for Sissies, it's well known that M2 is best FW amp
Ok, got the response from Ivan, trafo designer (known as bisesik on this forum): "Such a transformers are gapless and therefore can not handle DC-offset". Too bad ... 🙁 I need to try M2 one day.
Ok. So this is the best thing I think I could make with F4 and DAC with trafos on ouput.
One of my builds is based o es9038pro. I/V Trafo on output. Chip itself has high output current thus can produce high quality signal with enough gain to drive F4 directly.
Please take a look whether something like this will work.
One of my builds is based o es9038pro. I/V Trafo on output. Chip itself has high output current thus can produce high quality signal with enough gain to drive F4 directly.
Please take a look whether something like this will work.
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nope
read everything M2, then you will understand what need to be modulated (which point/node)
as you drew it, you made modulated short circuit
edit: find Crippled F4 schm in thread, connect xformer secondary in between GND and amp input , and that's it
read everything M2, then you will understand what need to be modulated (which point/node)
as you drew it, you made modulated short circuit
edit: find Crippled F4 schm in thread, connect xformer secondary in between GND and amp input , and that's it
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as you drew it (phases, not going in details will you burn xformer secondary or not in that way) , you practically have M2 - xformer driving source follower OS
naah
F4 is for Sissies, it's well known that M2 is best FW amp
Thanks.
I already have this DAC es9038pro connected to F4 standard way and it is fabulous. Just thought whether I could go further with that and skip caps or inputs stage, but apperetntly it is better to live it like it is and just make M2 🙂
Crippled F4, xformer driven
did't said that - why making M2, when you already have core of it ......
find Crippled F4 and you'll understand it
caps are necessary part of biasing mechanismus, and fussing about necessary parts is nothing more than Audiophoolery
been there, done that, zillion times
edit: found it, edited for ya
did't said that - why making M2, when you already have core of it ......
find Crippled F4 and you'll understand it
caps are necessary part of biasing mechanismus, and fussing about necessary parts is nothing more than Audiophoolery
been there, done that, zillion times
edit: found it, edited for ya
Attachments
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did't said that - why making M2, when you already have core of it ......
find Crippled F4 and you'll understand it
caps are necessary part of biasing mechanismus, and fussing about necessary parts is nothing more than Audiophoolery
been there, done that, zillion times
edit: found it, edited for ya
Thank you! Just started drawing same thing. Just to clarify is there connection between input signal and inbetween D3 and D4?
ZM, D3 and D4 are unnecessary when the JFETs are gone. BUT aren't you going to fret and fuss and worry about a Zobel terminating network for the transformer secondary?
There is already 5k6 resistor on secondaries inside the dac.
So attached would be the final?
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I am the first one to get overly enthusiastic and bang the damn thing on input waaaay above the rails (OK, it can happen to me only on bench, with Dummies on both ends of amp, not when connected to my both precious and efficient spks) ...... so better to leave these diodes on input
Zobel - that's Xformer's Dad job, I don't even know which one is going to be used
though, 47K on input deliberately stays in place
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leave damn 47K in place...... if nothing else, it'll keep 220uF properly bled, without nasty surprises when you're playing with interconnects
Ok. Just still do not get whether input signal should be connected in between D3 and D4 as well (like between 220uF caps) ... ? on your drawing I cannot say whether it is black dot on this junction.
as you drew it (phases, not going in details will you burn xformer secondary or not in that way) , you practically have M2 - xformer driving source follower OS
naah
F4 is for Sissies, it's well known that M2 is best FW amp
Differences in sound between F4 and M2x on high sensitive speakers?
THX
F4 is sorta less visible in entire picture
M2 is having own FE, remember, which is certainly having own sound character
M2 is having own FE, remember, which is certainly having own sound character