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5670 Thoughts?
5670 Thoughts?
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Old 8th November 2010, 06:20 AM   #1
eeyore is offline eeyore  Australia
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Default 5670 Thoughts?

What do you guys think of the 5670 as a gain tube in a preamp stage application. This will be coupled to a 6n6/5687/etc hefty tube to do the lifting. Looking for a medium mu dual triode. Discounted the 12AU7, 12SN7.
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Old 8th November 2010, 10:25 AM   #2
Miles Prower is offline Miles Prower  United States
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No direct experience with this one, but it looks like you ought to be able to find a decent loadline if you have the Vpp margin to get the plate current above 5.0mA or so. Looks like a good choice if you need something that falls between a 12AU7 and a 12AT7 for gain.

Maybe someone has actually tried them?
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Old 8th November 2010, 02:04 PM   #3
Tubelab_com is offline Tubelab_com  United States
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Quote:
Maybe someone has actually tried them?
I have used them in LTP. They work good. Odd pinout though. I have seen schematics using them in amplifiers and preamps but I don't have anything in memory right now. Search here or Google using all of the possible numbers.

5670 = 2C51 = WE396A
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Old 8th November 2010, 03:27 PM   #4
DualTriode is offline DualTriode  United States
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Hello,
The 5670 is a nice little tube. I have assembled several breadboard circuits with it. Take a look at the curves; they look well behaved; straight and evenly spaced. There are many of them around for not much money. They were built to be used in a M1 tank.
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Old 8th November 2010, 03:30 PM   #5
Svein_B is offline Svein_B  Norway
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The Russian and Chinese 6N3 are also equvalent. Used in many amps and CD plyaers sold on Ebay.
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Old 8th November 2010, 06:31 PM   #6
kevinkr is offline kevinkr  United States
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5670 Thoughts?
Quote:
Originally Posted by DualTriode View Post
Hello,
The 5670 is a nice little tube. I have assembled several breadboard circuits with it. Take a look at the curves; they look well behaved; straight and evenly spaced. There are many of them around for not much money. They were built to be used in a M1 tank.
DT
All just for Fun!
It's pretty popular in this neck of the woods for line and phono stages, reputedly a good sounding tube. I have a number here and a line stage that uses them that I never finished.. (Someday?)
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Old 8th November 2010, 06:52 PM   #7
acmarsden is offline acmarsden  United Kingdom
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Default 5670 Tube

The 5670 triode is used in S5 electronics K-16LS amp kits, among others, as a phase splitter, and in their add-on 'preamp' and tone circuits. I have built a few of these kits and never had a reliability issue with the 5670 or for that matter the 6005 pentodes used in the power amp section. Cost for a 5670 is $6.00.
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Old 8th November 2010, 07:58 PM   #8
Jaap is offline Jaap  Netherlands
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Here you have one: Reference preamp Othello !
2C51 = 5670 as you probably know
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Old 8th November 2010, 08:20 PM   #9
el156 is offline el156  Portugal
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I Like very much the ECC804 as dual triode medium mu ! Have done some things with them and are very good ! Dont know if someone tested this ones but are very linear and i like the sound !
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Old 8th November 2010, 08:49 PM   #10
Wavebourn is offline Wavebourn  United States
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5670 Thoughts?
Quote:
Originally Posted by Svein_B View Post
The Russian and Chinese 6N3 are also equvalent. Used in many amps and CD plyaers sold on Ebay.
Do you mean 5670 is similar garbage?

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