R13 is resistor adjusting modulation of Aleph CCS
vary , and find sweet spot for your speakers and ears
I re-used irf9610 (Q5 Q6) and irf9540 (Q1), r17 100K and r21 10K with C5 10pF, also i used 1uF(polycarbonate)//C6, now the dynamic is returned and the sound is very nice but is increased the sensibility and the noise, strangely also what seems to come from the PSU. I'm thinking to reduce R8 as Nelson Pass suggested in other posts. Or will I have to replace irf9540 with irf9610? Would anyone advise me?
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I discovered after last changes that also increase the sensibility, but now I have 100hz 10 mVpp in over speaker out. So now I need to decrease the input sensibility. I thinks also I need to preserve input resistors ratio before XLR and rca input. Who can suggest me some advise? Thanks in advance.
20db is regular gain of Aleph 3/30
that's too much for you ?
though , if you are going to decrease gain , to cure ripple on outpput ..... that's sorta just patching the problem , instead of curing it in first place
what's the real reason for excessive ripple on output ?
looking at pictures you posted up , there are several positions needing more explanation ....
for starters - give us few proper pictures from above the amp , to get full picture of things
that's too much for you ?
though , if you are going to decrease gain , to cure ripple on outpput ..... that's sorta just patching the problem , instead of curing it in first place
what's the real reason for excessive ripple on output ?
looking at pictures you posted up , there are several positions needing more explanation ....
for starters - give us few proper pictures from above the amp , to get full picture of things
It is a dual mono clc filter, there are 16x22000uF of cap.
I don't believe that can be a psu problem.
Otherwise I don't need to decrease the gain but simply the input sensitivity.
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gain is sometimes called input sensitivity 🙂
PSU problem can be loop , wiring , take out points etc.
will look later ........ need time to recuperate after Assen
PSU problem can be loop , wiring , take out points etc.
will look later ........ need time to recuperate after Assen
Attachments
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have no my notes near by , and not remembering what's "normal" for Alephs
will check tomorrow , if nobody chime in
anyhow , something's fishy there , for CLC
data for L ?
will check tomorrow , if nobody chime in
anyhow , something's fishy there , for CLC
data for L ?
I just discovered that if I do not use the unbalanced input and therefore do not short (-in) signal to the gnd , the noise is reduced considerably. Obviously, this can not happen if you use unbalanced input because it reduces the input sensitivity and even the low frequencies are poor.😡
In any case I would like to know if the capacitors of the PSU are efficient, how can I do it?
In any case I would like to know if the capacitors of the PSU are efficient, how can I do it?
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I see that you use star grounding. Check the pdf attached. It may give some guidance in that regard. There are also other clear explanations that could be useful.
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