Plate curves or Op Point for 6KN8? - diyAudio
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Old 16th February 2005, 06:33 AM   #1
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Default Plate curves or Op Point for 6KN8?

Hi all,

I have seached fruitlessly all over the web and cannot seem to find much information other than basic summary data for this valve. There have been a few cryptic (generally positive) postings on this forum which imply that some here have used this tube, so I'm crossing my fingers that a memeber may have some data on the plate curves or a suggessted operating point.

The 6KN8 looks to be a really promising device with a mu in the 40's and Rp around 2k.

Thanks in advance for your help.

Bill
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Old 16th February 2005, 06:41 AM   #2
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NJ7P says that 6BS8 is a substitute. Sorry, haven't found anything on the 6KN8, not even in the Vademecum...
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Old 17th February 2005, 07:17 AM   #3
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Default Thank you for the link.....

it may be as good as I get to get started anyway.

The 6KN8 looks a bit like two of the Russian 6C4Pi (not 6C45Pi)tubes in the same bottle which is why it had some attaction.

Cheers,
Bill
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Old 17th February 2005, 11:44 AM   #4
SY is offline SY  United States
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I've been using it in various apps over the years; it's a high mu version of the ECC88 family, sourced from Japan. It's happy at 8-10mA of plate current, works great in preamps. No curves, alas; even Frank's page is stumped.
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Old 18th February 2005, 06:44 AM   #5
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Default Thank you I'll give it a try (nt)

nt
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Old 11th June 2011, 04:59 AM   #6
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Quote:
Originally Posted by SY View Post
I've been using it in various apps over the years; it's a high mu version of the ECC88 family, sourced from Japan. It's happy at 8-10mA of plate current, works great in preamps. No curves, alas; even Frank's page is stumped.

Hi Sy,

having a higher mu, would you say the 6KN8 is even better in the role of a cathode follower?

i am thinking of implementing a version of your Impasse preamp using 6H23, driving a 4KN8 concertina for a balanced output...

as i do not need the higher output swing, can i use a lower b+ so that i can use those 250 volt caps i have in plenty?
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