ECC84/6N14P for audio

Ipanema · 3rd June 2010, 04:49 PM

How closely match is this double triodes in a single ECC84/6N14P at audio frequency? Datasheet mention about mismatch in capacitance between both triodes. But in audio frequency, does this matter? I've build a stereo cathode follower using this tube and both channel sounds the same to my ear. There's hardly any audio circuit published on this tube.

tubesteve · 4th June 2010, 03:58 AM

doesnt matter. the ECC84 was designed for RF, there it matters

Ipanema · 4th June 2010, 06:06 AM

Thanks for your answer. In your opinion why this tube is so unpopular to be use as a stereo unit? It is claimed to be low noise and high bandwidth.

tubesteve · 4th June 2010, 06:44 AM

ECC84: this tube is a nice one and with good linearity. better than most common ECCxx types. so, why they dont use it? dont know, and its not so easy to find. i tried to get some, but ran into problems

el156 · 4th June 2010, 07:57 AM

Hi!
How about the ECC804? Is it equivalent to ECC84? I have some ECC804 and i would like to use them for audio. I made some tests,and the sound is good.
Silvino

Ipanema · 4th June 2010, 08:11 AM

Is the Russion made 6N14P a good substitution for ECC84? There are lots of them on sale.

tubesteve · 4th June 2010, 08:21 AM

the ECC804 is a quite rare tube. it is ok to use in audio as well. its difficult to get more data than the basics right now. produced was it by Brimar and Telefunken, as i remember.

danzup · 09:03 AM

Quote:

Originally Posted by Ipanema

Is the Russion made 6N14P a good substitution for ECC84? There are lots of them on sale.

yes,
(sorry for confusing with 6p14p)

Ipanema · 4th June 2010, 08:43 AM

I mean this one. 6N14P - Wikipedia, the free encyclopedia

By googling, most of the applications for ECC84 is in FM and SRPP because this tube are design for cascode. But I'm interested to use it as a stereo pair.

timpert · 4th June 2010, 09:00 AM

Yes the 6N14P is a very close substitute to the ECC84, danzup is confusing it with the 6P14P, which is an EL84 substitute.

I'm currently playing with it, I bought ten of them cheaply on Ebay. It seems to be just fine for audio, with nice characteristics at lowish voltage. Only one thing should be kept in mind: there's a screen between the sections, which is connected to the grid of the section 1. This is intended to be used as a grounded-grid section, as the upper tube in a cascode. For audio, I do not expect any problems with this though.

3rd June 2010, 04:49 PM	#1
Ipanema diyAudio Member Join Date: Jun 2004 Location: KL	ECC84/6N14P for audio How closely match is this double triodes in a single ECC84/6N14P at audio frequency? Datasheet mention about mismatch in capacitance between both triodes. But in audio frequency, does this matter? I've build a stereo cathode follower using this tube and both channel sounds the same to my ear. There's hardly any audio circuit published on this tube.

4th June 2010, 03:58 AM	#2
tubesteve diyAudio Member Join Date: May 2009 Location: since 1998 in China as an electronic consulting design and testing engineer	doesnt matter. the ECC84 was designed for RF, there it matters __________________ The amount of humans is increasing, but the amount of available intelligence remains a constant.

4th June 2010, 06:44 AM	#4
tubesteve diyAudio Member Join Date: May 2009 Location: since 1998 in China as an electronic consulting design and testing engineer	ECC84: this tube is a nice one and with good linearity. better than most common ECCxx types. so, why they dont use it? dont know, and its not so easy to find. i tried to get some, but ran into problems __________________ The amount of humans is increasing, but the amount of available intelligence remains a constant.

4th June 2010, 08:21 AM	#7
tubesteve diyAudio Member Join Date: May 2009 Location: since 1998 in China as an electronic consulting design and testing engineer	the ECC804 is a quite rare tube. it is ok to use in audio as well. its difficult to get more data than the basics right now. produced was it by Brimar and Telefunken, as i remember. __________________ The amount of humans is increasing, but the amount of available intelligence remains a constant.

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4th June 2010, 06:06 AM	#3
Ipanema diyAudio Member Join Date: Jun 2004 Location: KL	Thanks for your answer. In your opinion why this tube is so unpopular to be use as a stereo unit? It is claimed to be low noise and high bandwidth.

4th June 2010, 07:57 AM	#5
el156 diyAudio Member Join Date: Apr 2010 Location: ALBUFEIRA ;PORTUGAL	Hi! How about the ECC804? Is it equivalent to ECC84? I have some ECC804 and i would like to use them for audio. I made some tests,and the sound is good. Silvino

4th June 2010, 08:11 AM	#6
Ipanema diyAudio Member Join Date: Jun 2004 Location: KL	Is the Russion made 6N14P a good substitution for ECC84? There are lots of them on sale.

4th June 2010, 08:43 AM	#9
Ipanema diyAudio Member Join Date: Jun 2004 Location: KL	I mean this one. 6N14P - Wikipedia, the free encyclopedia By googling, most of the applications for ECC84 is in FM and SRPP because this tube are design for cascode. But I'm interested to use it as a stereo pair.

4th June 2010, 09:00 AM	#10
timpert diyAudio Member Join Date: Nov 2004 Location: Netherlands	Yes the 6N14P is a very close substitute to the ECC84, danzup is confusing it with the 6P14P, which is an EL84 substitute. I'm currently playing with it, I bought ten of them cheaply on Ebay. It seems to be just fine for audio, with nice characteristics at lowish voltage. Only one thing should be kept in mind: there's a screen between the sections, which is connected to the grid of the section 1. This is intended to be used as a grounded-grid section, as the upper tube in a cascode. For audio, I do not expect any problems with this though.

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