Results 1 to 5 of 5

Thread: Getter flash spots changing over time

  1. #1
    Junior Member
    Join Date
    Mar 2017
    Posts
    10
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0

    Getter flash spots changing over time

    Does it indicate a problem or age, etc. if a tube (6550) starts to get a gray coloring around the side getter flash spots. It was totally silver when I first installed the tubes and now the edges are turning grayish.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	New Tung Sol Getter Flash Changing.JPG 
Views:	72 
Size:	74.6 KB 
ID:	45900  

    0 Not allowed! Not allowed!

  2. #2
    Lifetime Member Enzo's Avatar
    Join Date
    May 2006
    Location
    Lansing, Michigan, USA
    Posts
    30,947
    Thumbs Up/Down
    Received: 894/5
    Given: 0/0
    Generally means the vacuum inside the tube is going soft.

    0 Not allowed! Not allowed!
    Education is what you're left with after you have forgotten what you have learned.

  3. #3
    Supporting Member eschertron's Avatar
    Join Date
    Aug 2012
    Location
    Great Black Swamp
    Posts
    1,895
    Thumbs Up/Down
    Received: 145/0
    Given: 386/1
    What's the time frame? Hours, months, decades?

    0 Not allowed! Not allowed!
    If it still won't get loud enough, it's probably broken. - Steve Conner
    If the thing works, stop fixing it. - Enzo
    We need more chaos in music, in art... I'm here to make it. - Justin Thomas
    I've been ionized, but I'm okay now. - Buckaroo Banzai

  4. #4
    Lifetime Member Enzo's Avatar
    Join Date
    May 2006
    Location
    Lansing, Michigan, USA
    Posts
    30,947
    Thumbs Up/Down
    Received: 894/5
    Given: 0/0
    All I can say is this:

    If you see a guy on the street, and his hair is turning gray. It tells you he is aging - whether it happened suddenly or over 20 years is hard to say.

    A white edge to the getter means air, however fast things inside are changing. SLow leak, fast leak, who knows?

    0 Not allowed! Not allowed!
    Education is what you're left with after you have forgotten what you have learned.

  5. #5
    Old Timer
    Join Date
    May 2006
    Location
    Chill-Ville, VA
    Posts
    2,717
    Thumbs Up/Down
    Received: 264/4
    Given: 558/11
    Gas has gotten into the tube SOMEhow. Whether via vacuum leak or released because the tube was overheated, can't tell you. No way to predict life, either. Just keep a casual eye on it, in my opinion.

    Yes - what IS the timeframe?

    Justin

    0 Not allowed! Not allowed!
    "... If an older Boogie and classic Marshall had a (clearly illegitimate) child and you baked it in an oven set to clown shit crazy." - Chuck H. -
    "When receiving a shock I emit a strange loud high pitched girlish squeak." - Alex R -
    "All I ever managed to do with that amp was... kill small rodents within a 50 yard radius of my practice building." - Tone Meister -

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Changing/Biasing Tubes for the first time in JCM 900 SL-X
    By samth3mancgp in forum Maintenance, Troubleshooting & Repair
    Replies: 12
    Last Post: 03-09-2012, 04:13 PM
  2. Replies: 1
    Last Post: 12-10-2011, 05:45 AM
  3. Getter halo turned dull and brownish: tube still good?
    By slidincharlie (Carlo P) in forum Maintenance, Troubleshooting & Repair
    Replies: 6
    Last Post: 11-23-2008, 10:33 PM
  4. Mesa Nomad Pots have dead spots, what's up with that?
    By SteveB in forum Maintenance, Troubleshooting & Repair
    Replies: 6
    Last Post: 03-26-2008, 01:19 AM
  5. getter problems
    By Wakculloch in forum Tubes (Valves)
    Replies: 3
    Last Post: 02-01-2008, 01:54 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •