XP10/20 Coupling Caps

rsbay · 8th October 2009, 07:19 AM

Hello,

in NP's new preamps he uses different kind of coupling caps with a white color. In his older preamps (e.g. X0) Panasonic with an orange color were used. Has anyone an idea which type the new caps are?

Thanks for help

Ralph

Zen Mod · 8th October 2009, 08:26 AM

probably Papa knows

wayne · 8th October 2009, 11:00 PM

The caps we use are Wimas, Elna, Panasonic and Vishay. The XP10 and XP20 are DC coupled so be careful with your sources.

Nelson Pass · 9th October 2009, 02:26 AM

Quote:

Originally Posted by rsbay

in NP's new preamps...

You mean Wayne's new preamps.

rsbay · 9th October 2009, 05:04 AM

Hello,

as far as I know both preamps have an integrated variable resistor from Maxim as a volume regulator. This device has a single supply and you need two coupling caps there for every signal path.

Regards

Ralph

wayne · 9th October 2009, 07:28 PM

They don't in the preamps we build. The 1802 is single supply. the 1882 is ran on +- 6.8 Volt supply. A wonderful part the 1882 has no opamps and great specs.
You will see they spec parts worse case not best as most companies do.

Kamel · 10:52 PM

But it will only work with 6,8V (I thougt 2V but it seems to be maximum iss VCC). So Gain must be reduced in Input...

Does it make sense?

Best regards

Felix

Nelson Pass · 10th October 2009, 11:49 PM

That limitation only exists in the application notes, and even
then I wouldn't consider it a serious issue. Does your
source voltage exceed that?

Kamel · 11th October 2009, 10:20 AM

Perhaps my Ono. It's maximum Output is 20V rms...

Best regards Felix

Zen Mod · 11th October 2009, 10:58 AM

Quote:

Originally Posted by Kamel

Perhaps my Ono. It's maximum Output is 20V rms...

Best regards Felix

except in case that you're trowing these 20V directly in F4 input ...... I have doubts that you ever use that potential ......

what's gain of Ono , and what's signal level feeding it ?

then calculate whats real output

8th October 2009, 07:19 AM	#1
rsbay diyAudio Member Join Date: Apr 2004 Location: Erkelenz	XP10/20 Coupling Caps Hello, in NP's new preamps he uses different kind of coupling caps with a white color. In his older preamps (e.g. X0) Panasonic with an orange color were used. Has anyone an idea which type the new caps are? Thanks for help Ralph

8th October 2009, 08:26 AM	#2
Zen Mod Official Court Jester diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	probably Papa knows __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery

10th October 2009, 10:47 PM	#7
Kamel diyAudio Member Join Date: Sep 2008 Location: Mannheim	But it will only work with 6,8V (I thougt 2V but it seems to be maximum iss VCC). So Gain must be reduced in Input... Does it make sense? Best regards Felix Last edited by Kamel; 10th October 2009 at 10:52 PM.

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8th October 2009, 11:00 PM	#3
wayne diyAudio Member Join Date: Jan 2002 Location: Northern California	The caps we use are Wimas, Elna, Panasonic and Vishay. The XP10 and XP20 are DC coupled so be careful with your sources.

9th October 2009, 05:04 AM	#5
rsbay diyAudio Member Join Date: Apr 2004 Location: Erkelenz	Hello, as far as I know both preamps have an integrated variable resistor from Maxim as a volume regulator. This device has a single supply and you need two coupling caps there for every signal path. Regards Ralph

9th October 2009, 07:28 PM	#6
wayne diyAudio Member Join Date: Jan 2002 Location: Northern California	They don't in the preamps we build. The 1802 is single supply. the 1882 is ran on +- 6.8 Volt supply. A wonderful part the 1882 has no opamps and great specs. You will see they spec parts worse case not best as most companies do.

10th October 2009, 11:49 PM	#8
Nelson Pass The one and only Join Date: Mar 2001	That limitation only exists in the application notes, and even then I wouldn't consider it a serious issue. Does your source voltage exceed that?

11th October 2009, 10:20 AM	#9
Kamel diyAudio Member Join Date: Sep 2008 Location: Mannheim	Perhaps my Ono. It's maximum Output is 20V rms... Best regards Felix

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