SEX tubes

i luvmusic 2 · 21299

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Offline fullheadofnothing

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Reply #15 on: October 23, 2014, 12:33:01 PM
Use ones that you didn't pay much for...

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Offline i luvmusic 2

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Reply #16 on: October 23, 2014, 01:07:04 PM
OK THANK YOU!

I will be using the 6H8C for now to see how it goes.
« Last Edit: October 23, 2014, 01:11:08 PM by i luvmusic 2 »


Offline JamieMcC

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Reply #17 on: October 23, 2014, 01:20:06 PM
Quote from: i luvmusic 2 on October 23, 2014, 01:07:04 PM
OK THANK YOU!

I will be using the 6H8C for now to see how it goes.

Make sure to let us know how you get on the Russian 6h8c are inexpensive enough to be regularly disposable.

Shoot for the moon if you miss you will still be amongst the stars!

Offline i luvmusic 2

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Reply #18 on: October 23, 2014, 01:36:25 PM
 I don't mean they are inexpensive/disposable,It just happened that i paid $3 a piece compare to my other 6SN7's .
I hoped i did not offend anyone.if i did PARDON ME...

BTW You guys should give it a try it does work and sound nice too.


Offline mcandmar

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Reply #19 on: October 23, 2014, 02:11:56 PM
I can never tell if PJ is being serious or just trolling us (https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fwww.cr-x.org%2Fgif%2Fsuspect.gif&hash=f0cf7566a00a8343a1f741a9a520c9f82a7fb71b)

6H8C is basically a 6SN7GT and limited to ~300v plate voltage so it may not be suitable.

M.McCandless

Offline i luvmusic 2

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Reply #20 on: October 23, 2014, 02:16:35 PM
So far still working no unusual things happening i will run it for a little longer and see.


Offline i luvmusic 2

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Reply #21 on: October 24, 2014, 11:42:05 AM
So far i run the 6SN7 on the SEX for 6 hrs last night and no issue.I will continue to use these tube until i see/hear something strange.


Offline Paul Birkeland

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Reply #22 on: October 24, 2014, 12:09:11 PM
If we assume that this modification drastically cuts down the life of a 6SN7, say by 50%, then you should run the amp for 5,000 hours and see what happens.  (Not 6)

-PB

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Offline Natural Sound

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Reply #23 on: October 24, 2014, 12:42:29 PM
Not sure why anyone would want to do that to a perfectly good 6SN7. ???


Offline Paul Joppa

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Reply #24 on: October 24, 2014, 06:45:22 PM
Haha - "smoke 'em if you got 'em"

How does the sound compare?

Paul Joppa

Offline i luvmusic 2

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Reply #25 on: October 25, 2014, 01:24:32 AM
  I'am not good at describing sound but i will try,The 6H8C sounds more relaxing than the 6DN7 a little less Bass and smoother treble.
To my ears there are times that the 6DN7 can be harsh on my ears but so far i did not experienced these with the 6H8C.
  IMO when it comes to music/audio gear it's most likely a personal taste,Sounds that is good to my ears might not for others it's like one of those cable/capacitor debates but lets not go there.
« Last Edit: October 25, 2014, 01:33:34 AM by i luvmusic 2 »


Offline Grainger49

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Reply #26 on: October 25, 2014, 05:15:58 AM
Quote from: i luvmusic 2 on October 25, 2014, 01:24:32 AM
   .   .   .    IMO when it comes to music/audio gear it's most likely a personal taste, Sounds that is good to my ears might not for others it's like one of those cable/capacitor debates but lets not go there.

So true and you are the only one that matters in this.


Offline Paul Joppa

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Reply #27 on: October 27, 2014, 07:15:56 PM
So I fired up an old spreadsheet and looked more closely at the 6SN7-GTB. It should work just fine, and within spec. Output is about 3/4 watts, damping factor 1.0.

A speaker with a very low QT could work really well with the low damping factor; for example an FE-206E Fostex in a 1 cubic foot box tuned to 50Hz or a bit lower. Try a 2.5-inch ID tube 4" long. Parts Express has ready-made 1.0 CF boxes.

Paul Joppa

Offline i luvmusic 2

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Reply #28 on: October 28, 2014, 09:45:02 AM
Quote from: Paul Joppa on October 27, 2014, 07:15:56 PM
So I fired up an old spreadsheet and looked more closely at the 6SN7-GTB. It should work just fine, and within spec. Output is about 3/4 watts, damping factor 1.0.

A speaker with a very low QT could work really well with the low damping factor; for example an FE-206E Fostex in a 1 cubic foot box tuned to 50Hz or a bit lower. Try a 2.5-inch ID tube 4" long. Parts Express has ready-made 1.0 CF boxes.

THANK YOU For the INFO!


Offline FraGGleR

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Reply #29 on: November 06, 2014, 11:40:47 AM
Late to the conversation, but thetubecenter.com has 6DN7s and will match them if you want.  I got a pair of GE 6DN7s matched that got rid of the channel imbalance I had with the stock tubes.  http://www.thetubecenter.com/vacuumtubes_tubelist_tubes_6d4-6jz8.html   

Resonessence Concero -> Bottlehead S.E.X. 2.1 -> HD800

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