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  1. Replies
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    If yours has a coupling cap into the tank, like...

    If yours has a coupling cap into the tank, like C43, check that signal is getting through it.
  2. Replies
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    Do either of these schematics match up? 55253

    Do either of these schematics match up?

    55253
  3. Replies
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    194

    :thumbsup: on the melted in staples. Great way...

    :thumbsup: on the melted in staples. Great way to add strength when bonding plastic.
  4. Replies
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    All I can say without a schematic is that if you...

    All I can say without a schematic is that if you can't get a real loud response from the springs with the reverb and volume turned up, then I think the problem is on the recovery side of the reverb...
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    I've had problems with the shield wire in the...

    I've had problems with the shield wire in the wiring harness to the preamp with these, or the connectors.
  6. Every time you have described the sound it sounds...

    Every time you have described the sound it sounds like the amp is picking up some kind of external interference.
    Have you tried it at other locations? How have you determined the noise is not being...
  7. Thread: Ampeg J12-T

    by g1
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    112

    Have you verified with your meter that 0 on the...

    Have you verified with your meter that 0 on the pot is 0 ohms?
    Aside from that, the pulsing could be coupled through the power supply, C22 would be a suspect.
  8. Replies
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    So if it measures the same as other diodes, and a...

    So if it measures the same as other diodes, and a new one also measures same, it should be ok.
    Meantime, what is the unit you are trying to fix and what is the fault? :)
  9. Replies
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    If you bought another new bridge and it reads the...

    If you bought another new bridge and it reads the same, then the bridge is probably ok.
    So just a question about your meter, or whether it is some odd type of bridge.
  10. Replies
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    I'd also expect the epoxy to work well. However,...

    I'd also expect the epoxy to work well.
    However, because this is a bias probe, it is going to be stressed much more than a normal tube would.
    If the glue won't hold up, try to find one of these...
  11. Replies
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    Also some very good but expensive industrial...

    Also some very good but expensive industrial products out there, for example scotch-weld DP8010 or 4693.
  12. Replies
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    You can't free it up because it is forming...

    You can't free it up because it is forming "diodes" with the plates and cathodes cross-connected like that.
    Haven't read through all of this, but it's discussed here:...
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    DVL type was specifically called for in that...

    DVL type was specifically called for in that position due to safety concerns (due to failure mode of non DVL caps in line to ground and line to neutral applications).
    Now they use type Y for line...
  14. Replies
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    It's a bit hard to tell, but it looks like that...

    It's a bit hard to tell, but it looks like that (-) lug arced over to the chassis. I assume it's one of the caps that needs it's shell insulated from ground.
  15. Thread: Behringer PMX2000

    by g1
    Replies
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    143

    In this case, often the solder joint at the IEC...

    In this case, often the solder joint at the IEC cracks and becomes resistive. The heat buildup causes the trace to burn.
    That's if the burn is right beside or on the solder joint.
    If you can still...
  16. The switch is shown as 2 halves, SA6-A, and...

    The switch is shown as 2 halves, SA6-A, and SA6-B. 3 pins on each half.
  17. Replies
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    If it has a can cap that is soldered to the...

    If it has a can cap that is soldered to the chassis, you need a very good joint there for proper grounding. There are lots of tips & tricks available from folks here if that is required.
    What is...
  18. Replies
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    I'd guess it's OEM and the 'comm' on the label is...

    I'd guess it's OEM and the 'comm' on the label is for Commando.
  19. Without pictures I have no idea what is or is not...

    Without pictures I have no idea what is or is not on the main board, and I doubt you will be allowed to post pictures yet, but you can try.
    Some high end mixers have all modular construction, so...
  20. Have you opened the unit? Does it have...

    Have you opened the unit?
    Does it have connectors on the individual channels?
    If not, for a novice, it will be no easier for you to disable it than to fix it.

    (P.S. for those following,...
  21. Replies
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    You mean the cap he has added, .1uF 63V ? It is...

    You mean the cap he has added, .1uF 63V ?
    It is not electrolytic. Any .1uF of 63V or higher voltage rating will do.
  22. Here is the post I was referring to: ...

    Here is the post I was referring to: https://music-electronics-forum.com/showthread.php?t=49628&p=537786&viewfull=1#post537786
  23. Those schematics are not showing as I don't think...

    Those schematics are not showing as I don't think you have sufficient privileges yet.
    Here is a link to some: ...
  24. Link to other thread: ...

    Link to other thread: https://music-electronics-forum.com/showthread.php?t=49678
  25. Replies
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    See here for that resolution: ...

    See here for that resolution: https://music-electronics-forum.com/showthread.php?t=49686&p=538839&viewfull=1#post538839
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    Get the board number and check here: ...

    Get the board number and check here: https://music-electronics-forum.com/showthread.php?t=34637
  27. It was mentioned here recently that it is a good...

    It was mentioned here recently that it is a good idea to remove the PI tube when doing this type of bias measurement to prevent oscillation.
    Also, not sure why you are holding a guitar as biasing...
  28. Thread: Low Volume 5150

    by g1
    Replies
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    339

    Just rehashing what got lost in the shuffle from...

    Just rehashing what got lost in the shuffle from post #6 by Jazz P Bass. :)
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