Tubes Asylum

Anyone want to add some tube warmth to their cable TV system...

98.242.178.100

ABliss

Found this in a old meter room, got all excited when I saw the tubes, but nothing great I think.
Two 12BY7A, seven 6GK5, all Japan made. I know some CJs use 6GK5, but not sure if they even work. I will check if my tester has a setting for them.
Did Japan make any good tubes ?

Follow Ups:

RE: Anyone want to add some tube warmth to their cable TV system... - Eli Duttman 18:33:04 11/13/14 (4)
"Did Japan make any good tubes ?"

Hell yes!

Check out the prices for Matsushita made 6922s, EL34s, and 5AR4s, if you can find them. Matsushita acquired tooling from Mullard. The tubes physically resemble Mullard and sound a lot like Mullard too. Durability is only slightly less than the English "parents".

Japanese 6GK5s are also fine.

Eli D.
- RE: Anyone want to add some tube warmth to their cable TV system... - SteveSchecter 05:18:43 11/14/14 (3)
  Regarding Japanese tubes ... My first DIY project began with a ChannelMaster stereo integrated I bought for peanuts at Goodwill. The tubes inside were all ChannelMaster branded and include EL84, 12AX7, and 5AR4. I found that they all sounded very nice indeed in a variety of gear.
  
  Now after years of being around tubes and related ephemora, I found out that those tubes were likely made by Matsushita in Japan. Well, it turns out that the factory was equipped with gear from the European Philip/Amperex factories. (Which makes sense, since Philips owned Matsushita at the time). So we're basically talking about Bugle Boy design and quality tubes.
  - RE: Anyone want to add some tube warmth to their cable TV system... - zako 08:39:58 11/14/14 (2)
    What makes you think tubes have warmth? I hear distortion.
    - RE: Anyone want to add some tube warmth to their cable TV system... - Tre' 14:36:40 11/14/14 (1)
      " I hear distortion."
      
      Direct heated output tubes like the 45, 2a3 and the 300b are some of the most linear (distortion free) amplifying devices ever made.
      
      Take a look at a 6sn7 running 14ma at 200vdc plate into a high impedance (horizontal load line).
      
      There is almost no source for harmonic distortion.
      
      Show me one transistor that's anywhere near as linear.
      
      I'm not sure what you are hearing.
      
      Tre'
      
      Have Fun and Enjoy the Music
      "Still Working the Problem"
      - RE: Anyone want to add some tube warmth to their cable TV system... - Awe-d-o-file 16:07:02 11/14/14 (0)
        
        In Reply to: RE: Anyone want to add some tube warmth to their cable TV system... posted by Tre' on November 14, 2014 at 14:36:40
        
        I too will be interested to see his reply to your post. Which by the way was his first here......
        
        ET
        
        Edits: 11/14/14

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