Aleph 30 the best choice of C1 C2 C3 on brian gt PCB

[tonimxp]

Originally Posted by brianco

Who knows? You might just enjoy that!!

Hi!So.. I hope to get me are two beautiful nurses!

[Melon Head]

Originally Posted by tonimxp

Ok!I think is stuff good end right

More importantly tell us how you are enjoying your amp.
I always love to hear a good story

[tonimxp]

Originally Posted by Melon Head

More importantly tell us how you are enjoying your amp.
I always love to hear a good story

When i will finisch it i will let you know.

[wengtech]

Originally Posted by Zen Mod

short C1 you don't need it

pull out R10 , you don't need it

for C3 use decent cap

for C2 use Silmic , bypass it with 100nF MKC (polycarbonat)

i am doing this. already done.
before tweaks my dc out 0-10mV
after this tweaks dc out 70-80mV
why? is that normal?

btw the sounding indeed much more better after this tweaks, for me.

[Zen Mod]

70-80mV is nothing to write home about , but better to adjust it to zero

[tonimxp]

Originally Posted by wengtech

i am doing this. already done.
before tweaks my dc out 0-10mV
after this tweaks dc out 70-80mV
why? is that normal?

btw the sounding indeed much more better after this tweaks, for me.

You have to wait a few minutes before measuring the output voltage and you have to do with the load connected.
Have you done it?

[Zen Mod]

no

inputs shorted , no need for load , full temp ,lid closed

[tonimxp]

Originally Posted by Zen Mod

no

inputs shorted , no need for load , full temp ,lid closed

Ok!Good have known....

[wengtech]

when in balanced mode, dc out is 0-25mV
when in single ended mode (-in shorted with gnd), dc out is increased to 80mV
and it is peak at 300mV.

i am using Solen MKP 220uF/400v for the C2 bypass, is that the problem?

effect on the speakers : (with RCA connectors) there come some hiss and hum.
but no problem with the XLR mode.

[Zen Mod]

cap can't induce offset , excpt in case of broken (leaking ) one , which certainly isn't a case

few pics and some explanation will tell what's the reason for hiss and hum , when using unbalanced