say that PCM gives you more resolution ;
but I really didn't tried them in "same" conditions .
yes - you can do I/V conversion in may different ways
passive - with resistor is second worst way , better just than OP I/V
at least for me ;
but remember - I'm not specialist in this field
but I really didn't tried them in "same" conditions .
yes - you can do I/V conversion in may different ways
passive - with resistor is second worst way , better just than OP I/V
at least for me ;
but remember - I'm not specialist in this field
Maybe it would be more fair to say: "I don't know how to make a good I/V stage with OpAmp..." 😉
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If you mean usual factory solutons, yes. But if you try to make a really good I/V stage using an OpAmp, you'll recognise the challenge - not all OpAmps are created equal neither can be used in one-size-fits-all manner... 😉
PCM1704K, Burbely 437ish for I/V, EUVL buffers (or something tubish as in Ayon CD5/Skylla)
Then go really wild with a low noise shunt regulator for each individual stage (eg Burby's All-FETter again) in a separate powersupply case, with either dual bobby transformers or R-cores.
(choice of digit filter is all up to you)
... I'm extra subjective
Aren't we all ? 😉
I just don't want the guys who want to explore the OpAmp path to feel discouraged
what do you think about using this balanced F5 http://www.diyaudio.com/forums/pass-labs/121228-f5-power-amplifier-571.html#post1976175 with 2 pairs 2sk2013 / 2sj313 per side
difference between IRFs and sk/sj - in susy can be just matter of taste
according to my humble experience 😉
generally - verrrrrry nice amp
according to my humble experience 😉
generally - verrrrrry nice amp
Sorry, no.
Just use the original resistor values and the X connection posted by EUVL.
That sch. shows 2A bias per side. I wouldn't bias k2013/j313 with more than 0.5A per MOSFET. It means that you need 4 pairs per side = 8 pairs per channel.
that Is too much
what If I lower bias to 0.5 A per Mosfet and use 2 pairs
8R (2 x 1A) ^ 2 - 32 W Peak at 8 R
only 16 W Class A at 8 R Is that right
what If I lower bias to 0.5 A per Mosfet and use 2 pairs
8R (2 x 1A) ^ 2 - 32 W Peak at 8 R
only 16 W Class A at 8 R Is that right
Yes, that's right, and whenever your speaker's impedance drops lower than 8 Ohms it will be even less class A power.
2 pairs per side would make sense if you had 16 Ohms speaker...
why you would not bias FET at more than 0.5 A - heat Issue or sound Issue
here the voltage Is 16 V and not 20 V like yours
here the voltage Is 16 V and not 20 V like yours
k2013/j313 can also take 100ms pulses up to 2A, but I tend to play it safe - 8W constant Pd is the half of SOA limit at 60 degrees C. That's what I consider good in terms of long-term reliability. Maybe you can go a bit further - at 0.6A you'll have the advantage of zero tempco but I would stop there. Call me a wuss... 😀
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why do people persist to ask for definitive answers to such highly subjective questions? I would have thought it was pretty obvious why people here dont wish to give specific advice on matters of their own personal taste. I guess you figured this out now though and have just done earlier what was inevitable anyway. so think of it as saving time and money. building all and choose is really the only way you can know for yourself and npt be left wondering with that niggling feeling that you could have done better if you just......
but it will still happen....at some point it will happen again
at least you dove in the deep end, you are in good company here
but it will still happen....at some point it will happen again
at least you dove in the deep end, you are in good company here
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