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Old 6th February 2008, 07:11 AM   #1
vthieu is offline vthieu  Viet Nam
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Default Tube 6N3 use pre for ChipAmp

I have 1 tube 6N3-J , i want make pre-amp with this tube for chipamp 50w. Anyone have datasheet or schema pre-amp with this tube ? Can help me >>>Many thanks
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Old 6th February 2008, 09:13 AM   #2
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If it is the same 6N3 that you find in Russia (with nominator 6N3P), then an ECC85 or 6AQ8 is equivalent.
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Old 7th October 2010, 10:13 AM   #3
Bone is offline Bone  United Kingdom
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Ive just bought one of these on ebay which uses a pair of 6N3-Js.

6N3-3.jpg

Works well but gain is a little low. Traced out circuit shown below.

YUANJING HiFi 6N3.jpg

I assume that the gain is defined by 10K feedback resistor and 2k2 cathode resistor. Decreasing feedback should increase overall gain.
Circuit specified at rectified 150v for B+ supply. Will however give useful output if B+ is reduced to 50v

Just a suggestion.

Tony.
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Old 7th October 2010, 12:56 PM   #4
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Default 6N3=5670

Quote:
Originally Posted by soundbrigade View Post
If it is the same 6N3 that you find in Russia (with nominator 6N3P), then an ECC85 or 6AQ8 is equivalent.
6N3=6N3P=2C51=5670
Cheap 5670 currently on ebay and also Soviet 6N3P-EV can routinely be found for under $2/piece. Both sound much better than Chinese 6N3
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Old 7th October 2010, 08:01 PM   #5
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Default my very first diy amp

a few weeks ago I build (not yet finished):

6N3P preamp, LM3886 amp modules, ALPS pots, JantzenAudio terminals for speakers, JantzenAudio Silver cable. Sounds very good. Still working on front panel.
Next step - planning to change Wima capacitors with PIO on preamp
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File Type: jpg Preamp.JPG (269.2 KB, 1238 views)
File Type: jpg LM3886.JPG (257.5 KB, 1195 views)
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Old 8th October 2010, 10:53 AM   #6
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Quote:
Originally Posted by dovla View Post
6N3=6N3P=2C51=5670
Cheap 5670 currently on ebay and also Soviet 6N3P-EV can routinely be found for under $2/piece. Both sound much better than Chinese 6N3
Hello
I also have a few 6N3P-DR, easy to find on ebay, but obviously more expensive.
About Chinese buffers 6N3, improvement is indescribable. Are 10,000 tubes use goldgrid (the meaning - DR tubes, if I am wrong, with security in NOS tubes)
but without a doubt the -EB, as you say, already provides as much improvement at low price.

All the best
Fernan
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Old 8th October 2010, 11:19 AM   #7
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Quote:
Originally Posted by soundbrigade View Post
If it is the same 6N3 that you find in Russia (with nominator 6N3P), then an ECC85 or 6AQ8 is equivalent.
Hi Soundbrigade
I the Germany speec, the ECC85 always try the direct replacement 6N1P,
I believe that no China or Russian 6N3, reaches values max. of the ECC85 and/or 6N1P, please correct me, If I'm wrong.

As a curiosity, in FM detection, replacing the ECC85 by 6N1P, say that the reception is better, with better sensitivity.

Greetings and
All for the best sound,
thanks to the Forum and your whole respectable participation

Fernan
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Old 10th May 2011, 06:20 AM   #8
pete00t is offline pete00t  United States
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Quote:
Originally Posted by Bone View Post
Ive just bought one of these on ebay which uses a pair of 6N3-Js.

Attachment 190924

Works well but gain is a little low. Traced out circuit shown below.

Attachment 190925

I assume that the gain is defined by 10K feedback resistor and 2k2 cathode resistor. Decreasing feedback should increase overall gain.
Circuit specified at rectified 150v for B+ supply. Will however give useful output if B+ is reduced to 50v

Just a suggestion.

Tony.
I am new to tube audio. I wanted to start with just a little pre-amp. Is this the refined version of that amp? the circuit looks similair. It does carry a slightly beefier transformer though.
Attached Images
File Type: jpg 1804.jpg (183.6 KB, 981 views)

Last edited by pete00t; 10th May 2011 at 06:49 AM. Reason: grammer
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Old 8th December 2011, 10:20 PM   #9
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I just saw this

QINPU Q-2 mini HI-FI VACUUM TUBE INTEGRATED AMPLIFIER 100% BRAND - $67.39USD : Enjoy music, enjoy hifi audio!, we sell Music Angel,qinpu,yaqin,MeiXing MingDa,Bewitch,Bada Amplifiers, CD player,power amp, preamp

Looked up the tube and got a half wave rectifier which doesn't make sense. I suspect it is a mini dual triode running a chip amp with low wattage. Pretty cool for $70.

I was looking for the tube and found the amp, and this thread. Google really is changing things.

Thatch
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Old 8th December 2011, 11:03 PM   #10
Bone is offline Bone  United Kingdom
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A 6N3 is also a rectifier tube. The Chinese copied the Russian 6N3P double triode and called it a 6N3 just to confuse us.
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