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    The warm glow of tubes on a cold winter night

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    TMadden

    Posts : 99
    Join date : 2011-12-22

    The warm glow of tubes on a cold winter night

    Post by TMadden on Fri Dec 04, 2015 9:55 am

    Just installed Roy's octal driver boards into my  ST-120 based mono-blocks.
    Using WW2 surplus National Union round plate VT-99 (6F8G) tubes, the sound is excellent!
    I really like the look too, thought I would share:

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    Kentley

    Posts : 300
    Join date : 2015-03-06
    Age : 64
    Location : Worcester, MA

    Re: The warm glow of tubes on a cold winter night

    Post by Kentley on Fri Dec 04, 2015 10:33 am

    DYNA - MITE(S) !!!

    TMadden

    Posts : 99
    Join date : 2011-12-22

    Re: The warm glow of tubes on a cold winter night

    Post by TMadden on Fri Dec 04, 2015 11:19 am

    Thanks Kentley!

    Frank111

    Posts : 83
    Join date : 2015-02-23
    Location : Minneapolis/StPaul Area

    Re: The warm glow of tubes on a cold winter night

    Post by Frank111 on Fri Dec 04, 2015 11:45 am

    Years ago, I bought some NOS 6F8-G tubes to keep for a 15 tube Zenith radio that used that tube. I boxed them up and they are put away. Basically forgot about them. Price has gone up since then!
    Maybe some tubes are a good investment! Never would have expected that with the 6F8-G though.

    TMadden

    Posts : 99
    Join date : 2011-12-22

    Re: The warm glow of tubes on a cold winter night

    Post by TMadden on Fri Dec 04, 2015 11:58 am

    "Maybe some tubes are a good investment!"
    I think so, esp. any early NOS audio related tube. I have been accumulating a few tubes, I look at them as a potential investment. I like the 6F8's round plate configuration, I believe the symmetry promotes linearity, lower distortion. I initially bought them for preamp use as an 6SN7 alternative, but they tend to get noisy when the filament and cathode aren't at nearly the same voltage. They warn against any voltage diff. in the spec sheets. In my preamp, it would have been a lot of rework to achieve that. But in the amps, they are very quiet, and sound great.

    deepee99

    Posts : 1260
    Join date : 2012-05-23
    Location : Wallace, Idaho

    Re: The warm glow of tubes on a cold winter night

    Post by deepee99 on Sun Dec 06, 2015 1:56 am

    Tung-Sols glowing like an open fire
    Octals singing on their board
    National Unions add just the right touch
    To Norah and Bach and LPs galore ...

    And so, I'm offering this
    Simple phrase to geeks from
    One to ninety-two
    Altho' it's been said many times
    Many ways
    “Set your bias at point-six per tube."

    TMadden

    Posts : 99
    Join date : 2011-12-22

    Re: The warm glow of tubes on a cold winter night

    Post by TMadden on Sun Dec 06, 2015 7:56 pm

    deepee99 wrote:Tung-Sols glowing like an open fire
    Octals singing on their board
    National Unions add just the right touch
    To Norah and Bach and LPs galore ...

    And so, I'm offering this
    Simple phrase to geeks from
    One to ninety-two
    Altho' it's been said many times
    Many ways
    “Set your bias at point-six per tube."


    Ha-Ha, I love it!!

    MontanaWay

    Posts : 767
    Join date : 2014-02-06
    Age : 58
    Location : Cameron, Montana

    Re: The warm glow of tubes on a cold winter night

    Post by MontanaWay on Sun Dec 06, 2015 8:51 pm

    looks like they're all red plating!! Razz

    TMadden

    Posts : 99
    Join date : 2011-12-22

    Re: The warm glow of tubes on a cold winter night

    Post by TMadden on Sun Dec 06, 2015 9:01 pm

    MontanaWay wrote:looks like they're all red plating!! Razz

    What?? They aren't supposed to look that way???? I set the bias just like the instructions said to, 5.50 volts.....

    MontanaWay

    Posts : 767
    Join date : 2014-02-06
    Age : 58
    Location : Cameron, Montana

    Re: The warm glow of tubes on a cold winter night

    Post by MontanaWay on Sun Dec 06, 2015 9:04 pm

    TMadden wrote:
    MontanaWay wrote:looks like they're all red plating!! Razz

    What?? They aren't supposed to look that way???? I set the bias just like the instructions said to, 5.50 volts.....

    oh ok...you're just fine then!! What a Face btw...I set mine at 10V.....nice and warm!! clown

    TMadden

    Posts : 99
    Join date : 2011-12-22

    Re: The warm glow of tubes on a cold winter night

    Post by TMadden on Sun Dec 06, 2015 9:08 pm

    MontanaWay wrote:
    TMadden wrote:
    MontanaWay wrote:looks like they're all red plating!! Razz

    What?? They aren't supposed to look that way???? I set the bias just like the instructions said to, 5.50 volts.....

    oh ok...you're just fine then!! What a Face   btw...I set mine at 10V.....nice and warm!! clown

    I think I smell something burning!!! affraid

    zx

    Posts : 194
    Join date : 2011-08-05

    Re: The warm glow of tubes on a cold winter night

    Post by zx on Mon Dec 07, 2015 6:47 pm

    like the look....thanks for the pic...






    thanks for the site Bob..........................

    thompson12

    Posts : 18
    Join date : 2015-11-23
    Age : 55
    Location : Lehigh valley pa

    Re: The warm glow of tubes on a cold winter night

    Post by thompson12 on Mon Dec 07, 2015 10:44 pm

    I just got my amp kits today I can't wait to turn on the heat Very Happy santa

    deepee99

    Posts : 1260
    Join date : 2012-05-23
    Location : Wallace, Idaho

    Re: The warm glow of tubes on a cold winter night

    Post by deepee99 on Tue Dec 08, 2015 1:48 am

    thompson12 wrote:I just got my amp kits today I can't wait to turn on the heat Very Happy santa

    Let the fun begin!!! (Or, Welcome to Tommy's Holiday Camp, as The Who would say).
    Have you acquired a tube set yet?

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