Search:

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

Page 1 of 18 1 2 3 4

Search: Search took 0.03 seconds.

  1. Since the signal is capacitively de-coupled from...

    Since the signal is capacitively de-coupled from the power rails, you can simply level-shift the -12vdc and 0vdc to 0vdc and +12vdc without problems. It looks like it would work on 9vdc (typical...
  2. Replies
    13
    Views
    205

    So the fwd voltage drop from the sheet is...

    So the fwd voltage drop from the sheet is typically 0.7vdc, what we expect from one diode drop. If you are measuring across two diodes (from + to -, for example, or ~ to ~) you'd probably read...
  3. Replies
    13
    Views
    205

    What are the units? mV? What's the part/model...

    What are the units? mV?
    What's the part/model number of the bridge?
    Can you put new batteries in your meter to see if the readings change?

    - any/all of these will help determine the right...
  4. Replies
    15
    Views
    269

    I mis-read the schem. I see now that cathodes and...

    I mis-read the schem. I see now that cathodes and plates are tied 69-style.
  5. What tubeswell said. Also, as extra insurance,...

    What tubeswell said. Also, as extra insurance, you can do what a machinist taught me: Start with a bit no bigger than the mark you made. Step up a size or two, redrill. Take several iterations to get...
  6. Replies
    15
    Views
    269

    First, how does that function? Is it modulating a...

    First, how does that function? Is it modulating a load impedance on the first stage's anode? That's weird.
    Second, since I don't know how it works, I shouldn't be offering any advice... but unless...
  7. Replies
    26
    Views
    362

    Oh! You meant volume! I was referring to sneaking...

    Oh! You meant volume! I was referring to sneaking off stage between horn stabs to get a beer or pinch the girls :twisted:
  8. Replies
    26
    Views
    362

    I played trombone in a band for a few years....

    I played trombone in a band for a few years. You're right, we were wild! :p
  9. If it's there because the legal team sought to...

    If it's there because the legal team sought to prevent pencils/chopsticks/wire coat hangers from getting to the circuit board, it's mistaken protection. This only increases Fender's liability since...
  10. Replies
    8
    Views
    223

    I've never seen one,but the fact that it sits on...

    I've never seen one,but the fact that it sits on the front panel of the amp gives it some appeal :thumbsup:
  11. Great. Now I have water all over my keyboard...

    Great. Now I have water all over my keyboard :tape:
  12. I'm just talking out my blowhole, but I might...

    I'm just talking out my blowhole, but I might expect a super-high-fidelity amp using an SE configuration to only produce a fraction of the rated output power of the tubes, in order to stay in the...
  13. So just to bump this question (and dispense with...

    So just to bump this question (and dispense with the social formalities):

    Anyone with experience on these TF1 modules (found in a TX816 rack)? Is there a procedure for adjusting the analog output...
  14. Replies
    10
    Views
    272

    I ordered a few values of the PR01 (02?) series...

    I ordered a few values of the PR01 (02?) series 1W resistors. I have to keep them away from my bulk resistor assortment, because I'll confuse them for 1/4W! I feel dizzy whenever I thumb through them...
  15. Maintaining Yamaha TX-816 tone modules (TF1)

    First, let me say that Yamaha naming a new series of mixers with the same model name (TF1) as an older product warrants a big thumbs down from me. Makes Google searches for info on the older device...
  16. Replies
    141
    Views
    1,929

    I like :thumbsup: And in the example, the...

    I like :thumbsup:
    And in the example, the cathode is bypassed.
  17. Replies
    141
    Views
    1,929

    True. But even that depends on a signal that is...

    True. But even that depends on a signal that is not balanced; if the cathode currents are opposite and equal then there's no cathode voltage deviation to drive a signal. If the grid error signal is...
  18. Replies
    141
    Views
    1,929

    All right, I was thinking that like a...

    All right, I was thinking that like a conventional paraphase, there's a voltage division. But I see this is a little different.
    I see that a voltage will develop at the node of R4 and R5 only when...
  19. Replies
    141
    Views
    1,929

    I don't expect that R4 and R5 have the same...

    I don't expect that R4 and R5 have the same value. Do they?
  20. Replies
    13
    Views
    256

    You need to measure it out of circuit ;)

    You need to measure it out of circuit ;)
  21. Replies
    5
    Views
    202

    Here's my non-technical take: If the amp's PSU...

    Here's my non-technical take: If the amp's PSU was really stiff, there'd be no problem. Each odd stage - in this case, the input stage, the stage after the mid control, and the FX loop send - are all...
  22. Replies
    5
    Views
    202

    My first build had quite a case of...

    My first build had quite a case of 'motor-boating', which is what you're describing.

    You could try moving the FX loop stages to the "C" node, but even then another RC filter for the input - per...
  23. Replies
    6
    Views
    251

    On my guitars, I sometimes find that the jack has...

    On my guitars, I sometimes find that the jack has rotated, usually as a result of me trying to tighten it without proper tools when I notice it is loose. Sometimes the rotation can cause strain on...
  24. Is the placement of the second grid signal as the...

    Is the placement of the second grid signal as the junction of the two grid leaks significant? I'm trying - and failing - to envision what the voltage of that node is actually doing. Is it staying at...
  25. I find myself making a list of changes, putting...

    I find myself making a list of changes, putting them in, and then trying to figure out which one *didn't* do what I expected :(



    The anode resistor makes a wee difference in the dynamic...
  26. As you go higher with the anode resistor, the...

    As you go higher with the anode resistor, the load line flattens out a bit, giving the stage more output swing for a given input swing. Not a lot, not like a 470k will magically create 470k/100k =...
  27. Replies
    16
    Views
    576

    I didn't start it, so I feel reluctant to spoil...

    I didn't start it, so I feel reluctant to spoil the fun. So, yes.

    and Juan, it's all fun. We're not picking on anybody.

    edit: simulpost!
  28. Replies
    16
    Views
    576

    Nigel just needs a helping hand ;)

    Nigel just needs a helping hand ;)
Results 1 to 28 of 500
Page 1 of 18 1 2 3 4