Search:

Type: Posts; User: 52 Bill; Keyword(s):

Page 1 of 18 1 2 3 4

Search: Search took 0.04 seconds.

  1. Replies
    2
    Views
    88

    Is the clock running?

    Is the clock running?
  2. Replies
    49
    Views
    1,122

    I think the give away here is that no readings...

    I think the give away here is that no readings are not the same as open coils. The pot resistance should still be in circuit even if the coils are wide open.
  3. Before you replace the output chip, let's take a...

    Before you replace the output chip, let's take a step back and see what's going on.

    Have you tested all of the internal fuses? I think I counted 5 secondary fuses in the power supply.

    Have you...
  4. If the manual that you linked is correct, the...

    If the manual that you linked is correct, the headphones are driven by a separate amplifier, so the headphone jack does not cut off the speaker in a traditional sense.

    The extension speaker jack...
  5. Replies
    43
    Views
    8,904

    Switch the two EL84 tubes and see if the...

    Switch the two EL84 tubes and see if the redplating stays with the socket or the tube.
  6. Replies
    10
    Views
    316

    The dc resistances will be something like 60 ohms...

    The dc resistances will be something like 60 ohms for the input side and 200 ohms for the output of the tank.

    The drive circuit of the amp places the reverb tank input coil into the feed back loop...
  7. I can't really tell from your photo, but it looks...

    I can't really tell from your photo, but it looks like a CTS pot. Is the wafer and resistance element okay?

    The wiper and shaft components can be swapped with one from an unbroken pot if you have...
  8. Replies
    67
    Views
    9,349

    Other than suggesting that you start a new thread...

    Other than suggesting that you start a new thread for your problem, you have already isolated the problem to the preamp (everything before Q5).

    Continue to isolate the preamp sections to try and...
  9. Mark: I tried an old Panasonic 2 pin capsule on...

    Mark:
    I tried an old Panasonic 2 pin capsule on mine and it worked fine. The volume control on the top of the pedal controls the volume of the mic inputs.

    Perhaps you have a problem with the...
  10. Replies
    70
    Views
    1,606

    Yes, the red wire is the center tap.

    Yes, the red wire is the center tap.
  11. Sorry, it wasn't where I thought it was, but I...

    Sorry, it wasn't where I thought it was, but I did find it and checked it out.

    The two mikes are connected by two separate shielded cables to the 3.5mm TRS plug. Each mike connects to the plug...
  12. I didn't realize that there are two mikes on...

    I didn't realize that there are two mikes on these things. I have one and can look for you later today.
  13. Replies
    37
    Views
    1,285

    Bad preamp tube? Bad section of the new filter...

    Bad preamp tube? Bad section of the new filter cap?
  14. I just searched eBay, there are a few used ones...

    I just searched eBay, there are a few used ones there for $30 each.
  15. Yes, what is wrong with the pot? The Lab...

    Yes, what is wrong with the pot?

    The Lab series amps used a pc mounted CTS pot with a reversed shaft, the resistance element was on the back of the pot instead of on the front side. I used to have...
  16. Replies
    24
    Views
    1,282

    The list of things in post #8 were the things...

    The list of things in post #8 were the things that I tried after asking here for help. Before that I went through the normal things that you try to fix this problem, like cleaning/replacing the...
  17. Replies
    24
    Views
    1,282

    This was more a matter of me trying to find an...

    This was more a matter of me trying to find an answer to the problem, so I wrote the whole thing off to experience and did not charge the customer. I will often spend more time than I should trying...
  18. Replies
    103
    Views
    3,201

    The diodes listed in the schematic are too old...

    The diodes listed in the schematic are too old and underrated for modern specs, just go with 1N4007s as replacements for all of them.
  19. That old F designation is not the same as the...

    That old F designation is not the same as the newer 4AB types codes. There used to be two tank codes Type F and type C.

    I was told a long time ago that the F stood for Fender and Fender type drive...
  20. Replies
    51
    Views
    5,377

    While I have nowhere near the experience level...

    While I have nowhere near the experience level that you have, I have fixed a few of these and I have seen one unit with black rollers before.

    All of the rest have had the white plastic ones.
  21. Replies
    7
    Views
    419

    Welcome to the place. Reading through your...

    Welcome to the place.

    Reading through your post, I'm not certain that I understand the actual problem. The amp light up but there is no sound?

    Do you have a schematic or a link that you can...
  22. Replies
    4
    Views
    361

    Check the ground connection on the reverb return...

    Check the ground connection on the reverb return cable at the tank. Check all of the RCA plugs for that matter.

    Also check the internal wiring of the tank.
  23. Replies
    14
    Views
    1,024

    I have had little luck on working on any of these...

    I have had little luck on working on any of these amps with the auto-bias circuit.

    The first time a few years ago a Super Sonic came in with a bad bias unit. Luckily it was only a bad connection...
  24. Replies
    51
    Views
    5,377

    That cap will probably work, but mounting may be...

    That cap will probably work, but mounting may be a problem. What is wrong with the cap you have? Being higher in value doesn't mean that it is bad.
  25. Stacked knobs from a Jazz Bass? Stacked knobs...

    Stacked knobs from a Jazz Bass? Stacked knobs from a Danelectro guitar?
  26. Replies
    3
    Views
    357

    Without looking up the code numbers, it could be...

    Without looking up the code numbers, it could be that the grounding scheme of the two tanks were different.

    When the original tank was in place, a bad connection could have ungrounded the shell,...
  27. Replies
    51
    Views
    5,377

    You need to use the DIN connectors for the two...

    You need to use the DIN connectors for the two mic inputs and the footswitch connector, as the 3rd input that is recommended for instrument use and the output have already been changed to 1/4" phone...
  28. Replies
    51
    Views
    5,377

    If the last photo is the wheel after you have...

    If the last photo is the wheel after you have abraded it, you still have a few problems.

    The shiny section is still going to slip because there is still a depression where the tape touches the...
Results 1 to 28 of 500
Page 1 of 18 1 2 3 4