Follow us on...
Follow us on Twitter Follow us on Facebook Watch us on YouTube
Register
Results 1 to 4 of 4
  1. #1
    Good Enough
    Join Date
    02.21.00
    Location
    Canada
    Posts
    2,491
    Favorite VH Album

    Carnal Knowledge
    Last Online

    03.30.13 @ 09:28 AM
    Likes
    0
    Liked 0 Times in 0 Posts

    If you haven't used it for a few years, things like capacitors can dry out and crap out causing voltage problems.
    It could have burnt out components in the power grid, or it could just be a weak or faulty power tube.
    I'm not saying it is the problem(the grid), just that it's a possibility.
    Changing the tube could remedy it, or you might just burn another tube and possibly do more damage to the head.
    Because of the very high voltages in the power section and low cost of having a tech check it out
    I'd recommend you take it over to a store and have a tech look at it.
    You're gonna have to replace the power tubes anyway and you'll need it rebiased so you might as well get the whole problem solved at the same time.

  2. #2
    Little Dreamer
    Join Date
    01.24.03
    Age
    47
    Location
    wollongong, nsw. australia
    Posts
    27
    Favorite VH Album

    5150
    Favorite VH Song

    5150
    Last Online

    12.31.69 @ 04:00 PM
    Likes
    0
    Liked 0 Times in 0 Posts

    Hi all.
    I recently turned on my 5150 head which i havent used for a few years. I noticed one of the power tubes really flaring up, so i turned it off.
    Any suggestions to the problem.
    rock

  3. #3
    Romeo Delight
    Join Date
    05.01.02
    Age
    57
    Posts
    71
    Favorite VH Album

    VH 1
    Last Online

    12.31.69 @ 04:00 PM
    Likes
    0
    Liked 0 Times in 0 Posts

    Tribb is right on, so I won't repeat what he said.

    I will add that a "runaway" tube is USUALLY, but not always due to a tube failure. If you feel lucky you could first try replacing the tubes.

    If you do, replace the entire set, and watch very closely as the tubes heat up and for a few minutes afterward. If there is any sign of that particular tube getting brighter than the others, shut the amp off immediately.

    If you don't feel comfortable with that, it is always best to see a tech. Runaway power tubes have a nasty habit of taking other components out with them.
    Roger C

  4. #4
    Little Dreamer
    Join Date
    01.24.03
    Age
    47
    Location
    wollongong, nsw. australia
    Posts
    27
    Favorite VH Album

    5150
    Favorite VH Song

    5150
    Last Online

    12.31.69 @ 04:00 PM
    Likes
    0
    Liked 0 Times in 0 Posts

    Thanks for your advice guys
    rock

 

 

Similar Threads

  1. Just got myself a 5150 head!!!!!
    By bcgvh in forum Guitar Room
    Replies: 9
    Last Post: 02.24.05, 06:22 AM
  2. JSX Head on a 5150 Combo...can it be done?
    By Flet in forum Guitar Room
    Replies: 4
    Last Post: 02.02.05, 04:36 AM
  3. 5150 TUBE REPLACMENT
    By BRENDO in forum Guitar Room
    Replies: 8
    Last Post: 09.30.02, 06:48 AM
  4. 5150 Head and Cab question
    By Reckless Fable in forum Guitar Room
    Replies: 1
    Last Post: 08.11.02, 02:20 AM
  5. Tube Amp Problem
    By AxeSlinger84 in forum Guitar Room
    Replies: 19
    Last Post: 02.28.02, 06:42 PM

Tags for this Thread

Posting Permissions

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