Tubes Asylum

I have several NOS NIB EI 12AX7

76.90.100.230

Tre'

In Reply to: RE: Could be EI 12AX7 posted by Jonesy on August 31, 2024 at 17:57:43

They have Philips codes on them.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

Follow Ups:

Update: My 6DJ8's Sylvanias have Yugoslavian Date Codes (nt) - Jonesy 17:37:09 09/16/24 (3)
NT

"I know just enough to get into trouble. But not enough to get out of it."
- RE: Update: My 6DJ8's Sylvanias have Yugoslavian Date Codes (nt) - Tre' 17:52:50 09/16/24 (1)
  .
  Have Fun and Enjoy the Music
  "Still Working the Problem"
  - RE: Update: My 6DJ8's Sylvanias have Yugoslavian Date Codes (nt) - Jonesy 18:42:52 09/16/24 (0)
    Yup. Sorry, I should have said they have Philips date codes indicating the EI Plant.
    
    I had forgotten I had looked the codes up years ago to confirm. Quite smudged now and somewhat obstructed by the branding.
    
    Thanks for the additional info on the Philips tooling. I had only come across that Philips supervised the process and that was it. Makes more sense now.
    
    Jonesy
    
    "I know just enough to get into trouble. But not enough to get out of it."
- RE: Update: My 6DJ8's Sylvanias have Yugoslavian Date Codes (nt) - Tre' 17:50:49 09/16/24 (0)
  All of these are Philips date codes.
  
  .
  Have Fun and Enjoy the Music
  "Still Working the Problem"
  - https://frank.pocnet.net/other/Philips/PhilipsCodeListAB.pdf (Open in New Window)
RE: I have several NOS NIB EI 12AX7 - Jonesy 15:34:11 09/03/24 (0)
I'll have to double check my Sylvania 6DJ8's. I don't recall any codes on them. They are A Frames and also came in a Sylvania sleeve pack in the 80's.

Will pull the amp out on the weekend.

Jonesy

"I know just enough to get into trouble. But not enough to get out of it."
RE: I have several NOS NIB EI 12AX7 - Story 13:17:35 09/03/24 (2)
their ok but in a guitar amp are or become microphonic. It happens in a full tilt Marshall. They sound very nice though
- RE: I have several NOS NIB EI 12AX7 - Tre' 15:21:40 09/03/24 (1)
  Have you tried Telefunken 12ax7? Did they become microphonic?
  
  Tre'
  Have Fun and Enjoy the Music
  "Still Working the Problem"
  - yes I have - Story 15:41:00 09/03/24 (0)
    they have a great sound too. Even the ribbed plate.
    
    They made great tubes back then, no doubt, when I was a wee lad, of course

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