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Preamp for 6N3 tube
Preamp for 6N3 tube
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Old 17th October 2016, 05:57 AM   #1
ckwong99 is offline ckwong99  Hong Kong
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Talking Preamp for 6N3 tube

Dear Folks,

Does anyone do this 6N3 based preamp can share the schematic ? My friend give me 4 these tubes. I want to DIY the preamp and use in between the DAC and Power AMP (FET)


CK
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Old 18th October 2016, 03:58 AM   #2
BinaryMike is offline BinaryMike  United States
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6N3 appears to be a rectifier tube. Would you care to post more information about the tubes in your possession?
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Old 18th October 2016, 04:51 AM   #3
toriversen is offline toriversen  Norway
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6N3 is a chinese copy of the Russian 6N3P, which is a copy of the US 5670/2C51 dual triode.
There are a lot of 6N3 preamp and buffer designs on the net, just "google" 6N3 tube preamp schematic
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Last edited by toriversen; 18th October 2016 at 04:56 AM.
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Old 18th October 2016, 06:08 AM   #4
ckwong99 is offline ckwong99  Hong Kong
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do you have any design suggest to me ?
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Old 18th October 2016, 06:53 AM   #5
toriversen is offline toriversen  Norway
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Take a look at:

Pre Amplifier for Rotel CDP Skematic diagram

as a start. This is to be used as a dac analog output stage.
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Old 18th October 2016, 07:55 AM   #6
ckwong99 is offline ckwong99  Hong Kong
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Thx
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Old 10th February 2017, 05:30 AM   #7
mprivitera1 is offline mprivitera1  Italy
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Quote:
Originally Posted by toriversen View Post
Take a look at:

Pre Amplifier for Rotel CDP Skematic diagram

as a start. This is to be used as a dac analog output stage.
Hello,

you think, it is possible to make changes to this preamp tube Preamplificatore valvolare stereo to adapt it to a DAC output?

Thanks so much
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Old 10th February 2017, 10:20 AM   #8
toriversen is offline toriversen  Norway
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Hi,
It's hard to say, there is no schematic for this on the website, and it also depends on the type of DAC you have. It could be a I out dac, then you need a current (I) to voltage (V) converter stage, or it could be a V out dac, then you actually only need a preamp stage. It is possible that the preamp you give the link to could be used for both, but it is hard to say without a schematic. I suggest that you take a look at:

http://www.pearl-hifi.com/06_Lit_Arc...for%20DACs.pdf

And: https://www.by-rutgers.nl/IV-converter.html , this is based on opamps, but explains the I to V converter and low pass filters.

You could also take a look at: http://www.tubecad.com/2012/06/blog0233.htm

It could give you the information you need to proceed with your project.
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Last edited by toriversen; 10th February 2017 at 10:41 AM.
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Old 10th February 2017, 03:18 PM   #9
Steve Morley is offline Steve Morley  Canada
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CK,
I'm not sure if you want to go the I to V converter route or what you want is a line stage to go between the output of your CDP and your power amp. Be careful of some of the 6N3 boards out there on eBay, they don't put nearly enough B+ voltage on the tubes to make them work properly (see link). Have your tubes tested if possible, there's no sense building something if the tubes you have are no good. The problem with the 6N3 and its 2C51 etc. western equivalents is that they have a unique pin-out so it would require some work to change an amp over to a more common 6DJ8 or 12AU7 tube for instance if you don't like the 6N3.

Cheers, Steve

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Old 10th February 2017, 07:19 PM   #10
mprivitera1 is offline mprivitera1  Italy
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Quote:
Originally Posted by toriversen View Post
Hi,
It's hard to say, there is no schematic for this on the website, and it also depends on the type of DAC you have. It could be a I out dac, then you need a current (I) to voltage (V) converter stage, or it could be a V out dac, then you actually only need a preamp stage. It is possible that the preamp you give the link to could be used for both, but it is hard to say without a schematic. I suggest that you take a look at:

http://www.pearl-hifi.com/06_Lit_Arc...for%20DACs.pdf

And: https://www.by-rutgers.nl/IV-converter.html , this is based on opamps, but explains the I to V converter and low pass filters.

You could also take a look at: Broskie I-to-V

It could give you the information you need to proceed with your project.
THANK YOU, for your advice me. My DAC is this https://it.aliexpress.com/item/Assem...4.13010608.0.0. 1Trc2p. Of course, no schematic it's hard modification.
 

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