Search:

Type: Posts; User: The Dude; Keyword(s):

Page 1 of 18 1 2 3 4

Search: Search took 0.04 seconds.

  1. Replies
    15
    Views
    132

    Are you switching pentode/triode mode with the...

    Are you switching pentode/triode mode with the amp running? What is the mains fuse value?
  2. Yep. The old "One Wire" cascade mod.

    Yep. The old "One Wire" cascade mod.
  3. Replies
    15
    Views
    132

    I agree, g1. Since the amp works in triode mode,...

    I agree, g1. Since the amp works in triode mode, presumably with screens connected to plate, I can't think of a reason you would draw more current in pentode mode with screen resistors in circuit and...
  4. Replies
    15
    Views
    132

    Did the amp ever work, or is it a new build? In...

    Did the amp ever work, or is it a new build? In other words, is it possible something could be wired incorrectly?
  5. Thread: faceplates?

    by The Dude
    Replies
    5
    Views
    87

    Thanks for the tip mac. I just downloaded Front...

    Thanks for the tip mac. I just downloaded Front Panel Express. I'll give it a whirl at next opportunity.
  6. Thread: faceplates?

    by The Dude
    Replies
    5
    Views
    87

    Has anyone tried 3D printing faceplates yet? I...

    Has anyone tried 3D printing faceplates yet? I have not, but I think it might work well. Maybe recessed text, etc.? I used to work for a company that built digital car dashes. The lenses were cut...
  7. ^^^^^^That. Plus,...... it would help to know...

    ^^^^^^That. Plus,...... it would help to know what amp we're modding. And FWIW, if I were adding a gain stage for the purpose of overdrive, I'd want a gain control. At a quick glance, I don't see...
  8. Replies
    6
    Views
    84

    I see a slot in the inner sleeve. Is it possible...

    I see a slot in the inner sleeve. Is it possible that the ground wire goes through that and makes it's connection by just getting sandwiched in the threads of the cap that screws on?
  9. When I click it says they have 3 in stock. ...

    When I click it says they have 3 in stock.

    Mouser has the same ones.
    ...
  10. These should work, also. ...

    These should work, also.

    https://www.audiolabga.com/mal_cart/mal_cart.php?find=VTL5C9&search_request_button=Search
  11. Replies
    5
    Views
    140

    I would have a look at solder connections on the...

    I would have a look at solder connections on the amp's input jack.
  12. Replies
    10
    Views
    124

    FWIW: I worked on one of those not too long ago...

    FWIW: I worked on one of those not too long ago with similar symptoms. It ended up not being the effects that were the cause. There was a shorted op amp on one of the inputs sending hash to the...
  13. Replies
    10
    Views
    124

    I've never cracked a part with freeze spray....

    I've never cracked a part with freeze spray. Regulators, processors, etc. can get hot. You could start with the finger test first. See what's getting hot.
  14. Try a 220 ohm sag resistor as suggested and see...

    Try a 220 ohm sag resistor as suggested and see what B+ voltage and idle current is. Tweak from there if necessary.
  15. Replies
    29
    Views
    4,851

    Sticky: Isn't there a "quick format" option?

    Isn't there a "quick format" option?
  16. Replies
    18
    Views
    334

    If there's no guitar signal getting through the...

    If there's no guitar signal getting through the amp, that actually makes it easier. Run a test signal through the amp and trace to the spot where you lose it. It's likely going to be the same spot...
  17. I'd just clean it up with a toothbrush and some...

    I'd just clean it up with a toothbrush and some WD40. If there's some rust left, so be it. At least the WD will help keep it at bay. The finish and everything else about the guitar has a well...
  18. Replies
    4
    Views
    111

    What's wrong with the transformer? Is it an open...

    What's wrong with the transformer? Is it an open primary? If so, I believe this transformer has a center tapped primary for use with either 110V or 220V. You could try wiring the other half of the...
  19. Replies
    4
    Views
    182

    Hey, at least they didn't solder it to the heater...

    Hey, at least they didn't solder it to the heater pin. ;)
  20. OK. I believe that's a Heyboer PT. Here's the...

    OK. I believe that's a Heyboer PT. Here's the diagram.

    https://www.mojotone.com/transformers/BRITISH-18W-PT.pdf

    So, the transformer is wired across a 120V tap. There is not a 100V primary tap,...
  21. It's hard to tell for sure, but that looks wrong...

    It's hard to tell for sure, but that looks wrong from what I can see assuming the transformer is like the diagram in your first post. The mains go to the first and third wire in the diagram and don't...
  22. Sorry for the silly question, but are the mains...

    Sorry for the silly question, but are the mains correctly wired to the 120V tap and not the 100V tap of the PT?
  23. Replies
    1
    Views
    108

    I can't find anything on that model. Are you sure...

    I can't find anything on that model. Are you sure that's a correct model #?
  24. Replies
    17
    Views
    1,358

    The most common failure of these is an open one...

    The most common failure of these is an open one shot thermal fuse. They can usually be repaired relatively easily.
  25. Replies
    11
    Views
    254

    At least the wound was cauterized with the hot...

    At least the wound was cauterized with the hot solder iron. :p
  26. And remember, when figuring plate voltage in a...

    And remember, when figuring plate voltage in a cathode biased amp, you need to subtract the cathode voltage from plate voltage measured to ground. The tube rating is plate to cathode. The tube has no...
  27. I believe 25K is recommended.

    I believe 25K is recommended.
  28. Oh wow. Just did a little more digging. Here are...

    Oh wow. Just did a little more digging. Here are the specs of what I think is the original tank.

    https://www.tubeampdoctor.com/en/9gb2c1b-tad-reverb-can-3x2-springs

    It's going to be hard to...
Results 1 to 28 of 500
Page 1 of 18 1 2 3 4