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Old 28th March 2010, 11:04 PM   #31
ariefwn is offline ariefwn  Indonesia
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Join Date: Sep 2008
Location: Bogor
thanks Ebbe and Kelly for the schematic..

below are the 'upgrade' i've done to the C352

Click the image to open in full size.
Click the image to open in full size.

auricap 0.22 paralel with the amp input caps, and riken carbon 1k paralel with the amp input resistor

thanks again guys
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Old 17th February 2013, 01:05 PM   #32
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Join Date: Sep 2009
Location: Stavanger (NORWAY)
Hi !
Sorry to recover an old 3D but I have just bought a used c352
I would like to know your opinion on these topics:
1) I am going to use only the preamp section ? is it good ? if I leave the power amp stage disconnected from speakers could I run into problems ?
2) is there any beneficial mod for the line section that could improve the sound ?
Thanks and regards,
gino

Last edited by ginetto61; 17th February 2013 at 01:08 PM.
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Old 17th February 2013, 07:24 PM   #33
kelly is offline kelly  United States
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Remove and jump the muting transistor. Programmable remote and unused input can be used to mute. This made a decent difference.
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Old 17th February 2013, 07:31 PM   #34
kelly is offline kelly  United States
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The tape montior circuit runs the signal through two relays. If you do not need the tape montior circuit, you can jump one relay which makes a nice difference. I do not remember exactly what I did, but you should be able to see what I am talking about if you have the schematic.

There is also some type of power supply (regulator) for the 12V trigger out that I removed and it sounded better. I did tons of stuff to my 352. Mostly removing stuff. Tone control and balance circuit...

Silverstar fuses made quite a bit fo difference in mine (using it as an amp). More so here than anywhere else I have tried them.
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Old 18th February 2013, 07:10 PM   #35
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Join Date: Sep 2009
Location: Stavanger (NORWAY)
Hi ! Thank you very much for your kind and valuable reply
No unfortunately I do not have the schematic
And yes I have noticed that just pushing defeat on tone controls has a beneficial effect
It is unbelievable how complex these amps have become.
A lot of things really do not needed.
Actually I am only interested to the preamp section of this amp because I have a surely better power amp. I already tried and like the sound.
Maybe better first to get the schema. I will look for in the web.
Kind regards,
beppe
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