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-   -   Plate curves or Op Point for 6KN8? (http://www.diyaudio.com/forums/tubes-valves/51693-plate-curves-op-point-6kn8.html)

bjaensch 16th February 2005 06:33 AM

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

audiousername 16th February 2005 06:41 AM

NJ7P says that 6BS8 is a substitute. Sorry, haven't found anything on the 6KN8, not even in the Vademecum...

bjaensch 17th February 2005 07:17 AM

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

SY 17th February 2005 11:44 AM

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.

bjaensch 18th February 2005 06:44 AM

Thank you I'll give it a try (nt)
 
nt

AJT 11th June 2011 04:59 AM

Quote:

Originally Posted by SY (Post 577531)
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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