Search:

Type: Posts; User: Enzo; Keyword(s):

Page 1 of 18 1 2 3 4

Search: Search took 0.12 seconds.

  1. Replies
    13
    Views
    187

    The bases should be similar, yes, but we have the...

    The bases should be similar, yes, but we have the 30v offset on the output sampled into Q6. Q6 normally tries to correct such differences.
  2. Replies
    5
    Views
    70

    You know what? SHow the customer the pictures of...

    You know what? SHow the customer the pictures of the damage you had to repair. Especially if you can show him a different ribbon termination that wasn't damaged. Tell him how you managed to save...
  3. Replies
    52
    Views
    786

    I don't know what this means. The cathode of...

    I don't know what this means. The cathode of D14 is also connected to the + end of C40? The cathode end of D14 should be grounded, which is the NEGATIVE end of C40. And of course the positive...
  4. Replies
    19
    Views
    276

    And what they are used to. I had a guy try his...

    And what they are used to. I had a guy try his first digital meter, and gave up and went back to analog meter. Why? The reading was always changing. it didn't matter to him when I pointed out the...
  5. Replies
    52
    Views
    786

    Sure, use a fingertip. ANy of them getting hot?

    Sure, use a fingertip. ANy of them getting hot?
  6. Replies
    52
    Views
    786

    C40 is in parallel with D13. By measuring across...

    C40 is in parallel with D13. By measuring across D13, you are also measuring across C40. Look at the schematic.

    Any chance D13 is in backwards? The cathode - the lined end - is the end NOT...
  7. Replies
    52
    Views
    786

    I think it cute the TP calls it 17v, but the...

    I think it cute the TP calls it 17v, but the schematic calls it 16v. I generally refer to these as 15v rails anyway. Point is your +15/16/17v is missing. Until that is restored, nothing that uses...
  8. Replies
    13
    Views
    187

    It is a switch, it turns on Q2 to bring +55v into...

    It is a switch, it turns on Q2 to bring +55v into the circuit to enable it. It is a power up mute circuit. There is +55v on the collector of Q2, so that whole circuit is working.
  9. Consider that that 1v pp is a peak number for...

    Consider that that 1v pp is a peak number for your pickup - the hard attack. if it clips, it only clips that attack. if you input a sine wave at that level, it is as if your guitar was permanently...
  10. Replies
    8
    Views
    146

    Eye on the prize, we are looking for what is...

    Eye on the prize, we are looking for what is blowing the fuse. If pulling the power tubes didn't help, we want to check flyback diodes, which are CR4 and CR6 on the schematic. Those are wired from...
  11. Replies
    19
    Views
    276

    I have a good meter, and want one around. But...

    I have a good meter, and want one around. But having said that, MOST of the time an accurate reading is not the issue. I usually don't have to worry if the 15v rail is 15.1 or 14.9 volts. What I...
  12. Replies
    15
    Views
    247

    10 gig ohms? Isn't that just... the air?

    10 gig ohms? Isn't that just... the air?
  13. Replies
    52
    Views
    786

    But really, you have the HP unit, why not take a...

    But really, you have the HP unit, why not take a moment and complete the instrument? Make up a cord with 1/4" male on one end and a connector to match the HP on the other. In your case a dual...
  14. Replies
    8
    Views
    146

    But you can test them for shorts without pulling...

    But you can test them for shorts without pulling the boards, just probe via the tube socket pins.
  15. Replies
    6
    Views
    173

    So the problem we are trying to solve is that the...

    So the problem we are trying to solve is that the customer saw flashes of light?

    On your bench, are there any performance problems you can detect?
  16. Thread: Earning my supper

    by Enzo
    Replies
    2
    Views
    85

    Earning my supper

    A lot of talk lately about quid pro quo. Well it came home to roost. A friend invited me and the wife over for dinner. We had pizza. This is the guy I have been trying to teach the black arts of...
  17. Replies
    15
    Views
    247

    I automatically resolder the power tube socket...

    I automatically resolder the power tube socket pins on those. And I agree to check pins 1 and 6 on the phase inverter for missing B+.
  18. Replies
    21
    Views
    225

    Agree, and it doesn't have to be loud to do it.

    Agree, and it doesn't have to be loud to do it.
  19. Replies
    13
    Views
    187

    What about them, they seem to be working. Q8 is...

    What about them, they seem to be working. Q8 is still a prime suspect.
  20. Replies
    8
    Views
    146

    Well I would have replaced the four power tubes...

    Well I would have replaced the four power tubes before replacing caps. Your blown high voltage fuse wants to agree with me. Pull those tubes, does it still blow the fuse?

    Alternately possible...
  21. Replies
    43
    Views
    553

    Clamato is revolting enough on its own, why ruin...

    Clamato is revolting enough on its own, why ruin perfectly good tomato juice? But what it REALLY nauseating is "Bud Light with Clamato". Yes, you can buy cans of beer with clamato already mixed...
  22. Replies
    43
    Views
    553

    Over here, plastic sporks are common in take-out...

    Over here, plastic sporks are common in take-out food. You can use it for either utensil, and the restaurant only need to put one utensil in your purchase. TO be honest, I prefer one over...
  23. Replies
    43
    Views
    553

    Sporks will fly...

    Sporks will fly...
  24. Thread: Gibson GA45RVT

    by Enzo
    Replies
    14
    Views
    272

    Voltages look real close. Those are 5w and 7w...

    Voltages look real close. Those are 5w and 7w resistors for a reason, expect them to warm up.
  25. Replies
    13
    Views
    187

    Pretty sure you have your B and C readings...

    Pretty sure you have your B and C readings reversed on Q6,Q7. Clearly B of Q8 and C of Q7 MUST be the same, they are wired together.

    Check Q7,8.
  26. Replies
    13
    Views
    187

    With no load, DC on the output won't draw excess...

    With no load, DC on the output won't draw excess current. But put a load on it and voila, bright bulb. Bias shouldn't affect DC on output. So work with NO load for now.

    Q5 is the bias...
  27. Thread: Gibson GA45RVT

    by Enzo
    Replies
    14
    Views
    272

    So R57 is not?

    So R57 is not?
  28. Thread: Gibson GA45RVT

    by Enzo
    Replies
    14
    Views
    272

    DO they still get hot in standby mode? V7 is a...

    DO they still get hot in standby mode?

    V7 is a 0A2 glow tube. It is the tube equivalent of a zener diode. 150v. If it is shorted, those resistors would burn. Make sure that is the type tube...
Results 1 to 28 of 500
Page 1 of 18 1 2 3 4