Ad Widget

Collapse

Announcement

Collapse
No announcement yet.

Schematic needed for Vibrolux Reverb w/ 4 6L6's ? Or was this a custom job?

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
  • #1

    Schematic needed for Vibrolux Reverb w/ 4 6L6's ? Or was this a custom job?

    Hey guys,
    I have a SF Vibrolux Reverb and I'm trying to find a schematic for it. This one has four 6L6's and a solid state rectifier. I've never seen this before, and I'm wondering if someone did a custom jobby on this, using the rectifier tube socket and adding another socket between the OT and PT for the fourth output tube. It definitely looks like someone's been in this thing, it's got a lot of odd things going on with it.
    Tags: None
  • #2
    Custom jobby.

    Historically, the Vibrolux is a 35 watt amp.

    Comment

    • #3
      Originally posted by Jazz P Bass View Post
      Custom jobby.

      Historically, the Vibrolux is a 35 watt amp.
      My friend brought it to me to take a look at, said it's his dad's old amp. Looks like it's a custom job for sure. Larger PT added, OT moved to make room for a 4th power tube. SS rectifier added, bias knob turned into a bias balance and an internal trimmer for bias voltage added. Also a master volume added too. And it's a combo that's been cut down into a head, so this thing is definitely hotrodded at some point in time!

      Looks like the humming issue my friend was having was just coming from blown 100 ohm resistors on the filament artificial centre tap.

      Comment

      • #4
        Originally posted by waspclothes View Post
        My friend brought it to me to take a look at, said it's his dad's old amp. Looks like it's a custom job for sure. Larger PT added, OT moved to make room for a 4th power tube. SS rectifier added, bias knob turned into a bias balance and an internal trimmer for bias voltage added. Also a master volume added too. And it's a combo that's been cut down into a head, so this thing is definitely hotrodded at some point in time!

        Looks like the humming issue my friend was having was just coming from blown 100 ohm resistors on the filament artificial centre tap.
        Good catch on the 100r. Just wanted to note that there's every reason to suspect a bad power tube being responsible for that resistors failure. If they were low rated resistors (like 1/2 watt) maybe not. Otherwise, you may need to evaluate the power tubes before you end up replacing more components.
        "Take two placebos, works twice as well." Enzo

        "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

        "If you're not interested in opinions and the experience of others, why even start a thread?
        You can't just expect consent." Helmholtz

        Comment

        • #5
          Originally posted by Chuck H View Post
          Good catch on the 100r. Just wanted to note that there's every reason to suspect a bad power tube being responsible for that resistors failure. If they were low rated resistors (like 1/2 watt) maybe not. Otherwise, you may need to evaluate the power tubes before you end up replacing more components.
          Thanks for the heads-up, I will get the amp back on the bench and check. I believe the resistors were 1/2W and that's what I put back in.

          Comment

          Previous template Next
          Working...
          X