nad c352 schematic

namcir · 2nd July 2007, 05:43 PM

hi to all,
does anyone have the service manual for the amp nad c352?
would like to make modifications but don't want to start without the sm.
anyone here have this amp and also interested in modifying it?
hope so....

es44 · 2nd July 2007, 05:47 PM

I don't have the amp, but i've got the service manual. If you give me a valid email address with enough room for about 2.6Mb, then it will come your way.
Best regards
Ebbe

namcir · 2nd July 2007, 05:51 PM

can you please send it to my e-mail addres? i'm not sure if it will work. but it is possible if you compress it or sending it by part in RAR form,
thanks...
regards,

namcir · 2nd July 2007, 05:54 PM

my problem with this amp is the signal is leaking at the other inputs well at 12 o clock...
is this normal?
anyone?

es44 · 2nd July 2007, 06:32 PM

Quote:

Originally posted by namcir
can you please send it to my e-mail addres? i'm not sure if it will work. but it is possible if you compress it or sending it by part in RAR form,
thanks...
regards,

I sure could try, if i had your email address, but i don't.

namcir · 2nd July 2007, 06:38 PM

hi
i have send you my e-mail address
best regards

namcir · 2nd July 2007, 07:20 PM

hi,
anyone here have the same amp, and want also to make mods?

namcir · 3rd July 2007, 07:55 PM

hi,
i have a question with the input impedance of the preamp and the input cap it is 100nf then 1M resistor to ground then going to the fet transistor 2sk170.
can i chane the cap to 10uf and the resistor to 100k?
why is the 1M resistor there instead of 47-100k?
can somebody explain it to me please?

anatech · 4th July 2007, 02:15 AM

Hi namcir,
The J-FET input is much like a vacuum tube, or valve. It doesn't require a low resistance to ground for bias currents. Therefore they can use a smaller, higher quality capacitor at a higher resistance and not sacrifice bass response.

I'd leave it the way it is. Going to an electrolytic cap is a step backwards in quality. Sounds like it has promise as a good amp.

-Chris

namcir · 4th July 2007, 01:36 PM

hi,
thanks marvin, oh yes now i know...
this is a good amp IMHO better than my yamaha amp more detailed and good in midbass.
but i think there are things that can be improved.
for the preamp input cap i'm planning to substitute it with a 10uf mkt not an electrolytic.
i have noticed there are some differences in the sm example in the preamp sm indicates 2sk363 input fet but actually in the unit they used 2sk170. again in amp driver stage sm=2sd669,2sb649
but amp=2sc5171, 2sa1930 and some parts etc.
i dont know why? can somebody explain? is the one i have a new version or an old version?

???
anyone?

2nd July 2007, 05:43 PM	#1
namcir diyAudio Member Join Date: Jul 2005 Location: mid_east	nad c352 schematic hi to all, does anyone have the service manual for the amp nad c352? would like to make modifications but don't want to start without the sm. anyone here have this amp and also interested in modifying it? hope so....

4th July 2007, 02:15 AM	#9
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi namcir, The J-FET input is much like a vacuum tube, or valve. It doesn't require a low resistance to ground for bias currents. Therefore they can use a smaller, higher quality capacitor at a higher resistance and not sacrifice bass response. I'd leave it the way it is. Going to an electrolytic cap is a step backwards in quality. Sounds like it has promise as a good amp. -Chris __________________ "Just because you can, doesn't mean you should" © my Wife

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2nd July 2007, 05:47 PM	#2
es44 diyAudio Member Join Date: Apr 2005 Location: Fredericia, DK	I don't have the amp, but i've got the service manual. If you give me a valid email address with enough room for about 2.6Mb, then it will come your way. Best regards Ebbe

2nd July 2007, 05:51 PM	#3
namcir diyAudio Member Join Date: Jul 2005 Location: mid_east	can you please send it to my e-mail addres? i'm not sure if it will work. but it is possible if you compress it or sending it by part in RAR form, thanks... regards,

2nd July 2007, 05:54 PM	#4
namcir diyAudio Member Join Date: Jul 2005 Location: mid_east	my problem with this amp is the signal is leaking at the other inputs well at 12 o clock... is this normal? anyone?

2nd July 2007, 06:38 PM	#6
namcir diyAudio Member Join Date: Jul 2005 Location: mid_east	hi i have send you my e-mail address best regards

2nd July 2007, 07:20 PM	#7
namcir diyAudio Member Join Date: Jul 2005 Location: mid_east	hi, anyone here have the same amp, and want also to make mods?

3rd July 2007, 07:55 PM	#8
namcir diyAudio Member Join Date: Jul 2005 Location: mid_east	hi, i have a question with the input impedance of the preamp and the input cap it is 100nf then 1M resistor to ground then going to the fet transistor 2sk170. can i chane the cap to 10uf and the resistor to 100k? why is the 1M resistor there instead of 47-100k? can somebody explain it to me please?

4th July 2007, 01:36 PM	#10
namcir diyAudio Member Join Date: Jul 2005 Location: mid_east	hi, thanks marvin, oh yes now i know... this is a good amp IMHO better than my yamaha amp more detailed and good in midbass. but i think there are things that can be improved. for the preamp input cap i'm planning to substitute it with a 10uf mkt not an electrolytic. i have noticed there are some differences in the sm example in the preamp sm indicates 2sk363 input fet but actually in the unit they used 2sk170. again in amp driver stage sm=2sd669,2sb649 but amp=2sc5171, 2sa1930 and some parts etc. i dont know why? can somebody explain? is the one i have a new version or an old version? ??? anyone?