Search:

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

Page 1 of 10 1 2 3 4

Search: Search took 0.02 seconds.

  1. Replies
    93
    Views
    12,050

    Just in order to summarize this visually - note...

    Just in order to summarize this visually - note the different positions where the wires are soldered to the caps:

    Hum:

    56204

    No hum:

    56205
  2. Replies
    93
    Views
    12,050

    Yes, i know, old thread: Do You have an...

    Yes, i know, old thread:



    Do You have an idea what makes them so loud?
    The stack below is so loud (with the M40) that i could even have used it open air as a bass amp instead of the G-2000...
  3. Replies
    38
    Views
    23,596

    Well, actually old, but i did a few measurements...

    Well, actually old, but i did a few measurements on the TM018. Inductance, with a simple multimeter (Peaktech 2005). Measurement frequency apparently 200 Hz - the manual is not really clear about...
  4. Replies
    446
    Views
    121,656

    Sticky: Joseph, exactly that was the impression from...

    Joseph,

    exactly that was the impression from my prototype with the thick wire. But nevertheless the 6 mm˛ loop of my prototype produced an at least reasonably balanced signal. Despite of that i do...
  5. Replies
    446
    Views
    121,656

    Sticky: Whis is exactly what i did. My description on the...

    Whis is exactly what i did. My description on the differences between the signals were based on these. Even for the Primavera, where the loop is larger, overcompensation is not an issue.

    These...
  6. Replies
    446
    Views
    121,656

    Sticky: mhmm, but that does not explain, why one loop...

    mhmm, but that does not explain, why one loop humbucks and the other doesn't.
    I still wonder if it is a question of loop geometry.
  7. Replies
    446
    Views
    121,656

    Sticky: The Sharkfin is Bass 1. Primavera is Bass 2 and...

    The Sharkfin is Bass 1. Primavera is Bass 2 and looks like that:

    55198

    last question first: the cavities and the channels are unshielded. Still unshielded. Will be done later when i make the...
  8. Replies
    446
    Views
    121,656

    Sticky: Which didn't have any effect in the 2nd case. But...

    Which didn't have any effect in the 2nd case. But a strong one in the 1st.



    I'm aware of that. The wavelength is irrelevant at any frequency of interest. That's why i specualted on interference...
  9. Replies
    446
    Views
    121,656

    Sticky: Unfortunately not success at all in the other...

    Unfortunately not success at all in the other bass. Same pickup, different coil geometry.
    55187

    The noise even increases. On the scope the noise signals from the loop and from the pickup seem...
  10. Replies
    446
    Views
    121,656

    Sticky: Success. Here some pictures - one turn, 6mm˛,...

    Success. Here some pictures - one turn, 6mm˛, Talema AX-1500, due to the small cross section of the loop. Sound slightly darker than without the loop, but that might easily be a feint caused by the...
  11. Replies
    13
    Views
    1,569

    That's what i actually expected when i thought...

    That's what i actually expected when i thought about the idea the first time - but i wanted to try. (And it was fun to see an autotransformer actually transforming upward on the scope).

    As i don't...
  12. Replies
    13
    Views
    1,569

    I just tried the transformer idea, using a...

    I just tried the transformer idea, using a Monacor LTR-110. This is a fairly cheap yet still good line transformer with a secondary for 1:1 and one for 1:0.5. connecting them and using them as an...
  13. Replies
    13
    Views
    1,569

    And that's why i'm considering using a...

    And that's why i'm considering using a transformer.

    Actually one of my target basses has the J-pickup so close to the bridge that it would profit of a lowering of the trebele resonance frequency.
  14. Replies
    446
    Views
    121,656

    Sticky: Recently i tried to run half of a split coil PU...

    Recently i tried to run half of a split coil PU with 3850 kOhms DCR in series with the pickup. not full cancellation, but it worked reasonably well with only a small effect on the voicing of the...
  15. Replies
    446
    Views
    121,656

    Sticky: Concluding: the idea should work. It might,...

    Concluding: the idea should work. It might, however, be useful to simply use more turns on the transformer, maybe 1500, and just one single loop. In conncetion with a High-Z pickup the impedance and...
  16. Replies
    446
    Views
    121,656

    Sticky: The circuit does not yet exist. The idea was...

    The circuit does not yet exist. The idea was using an "arbitrary" compensation coil and feeding that with inverted phase to an OpAmp based adder stage and doing the fine adjustment through the input...
  17. Replies
    446
    Views
    121,656

    Sticky: Just continuing the speculation a bit: if i chose...

    Just continuing the speculation a bit: if i chose the active way, i will run into trouble as soon as i manipulate the treble resonance of the pickup (which i intend to do...); the dummy loop should...
  18. Replies
    446
    Views
    121,656

    Sticky: No, the pickup has 6k DCR and hence heve...

    No, the pickup has 6k DCR and hence heve something in the range of 5000-8000 turns. I did my estimate with 6600 turns.

    Unfortunately the cavity is the only place for a dummy coil.

    BTW: i am...
  19. Replies
    446
    Views
    121,656

    Sticky: I'm aware of the Illitch concept and similar...

    I'm aware of the Illitch concept and similar approaches. But there is not enough space for such a large loop - it must fit into the e-cavity of that bass, which is in its upper horn:
    ...
  20. Replies
    446
    Views
    121,656

    Sticky: Yes, i would go in series. If i want to use a 500...

    Yes, i would go in series. If i want to use a 500 turns Talema i would need to fold a large loop into 2 or 3 turns but use the Talema only on one of the turns, wouldn't i?





    At least in the...
  21. Replies
    446
    Views
    121,656

    Sticky: Hi, maybe the question / the idea might sound...

    Hi, maybe the question / the idea might sound absurd - but it should be possible to use a loop/CT device for hum cancellation, shouldn't it?

    Background: i have just built two basses, both with...
  22. Replies
    446
    Views
    121,656

    Sticky: What do You mean by static? I am running a 500...

    What do You mean by static?

    I am running a 500 turns LoZ pickup with a 2.5-k-Pot (and a C-Switch), into an assymetric cable. No probs. But it was also ok, when i sent the signal through a...
  23. Replies
    302
    Views
    31,830

    Sticky: Sitting in front of my Devuan ASCII loaded...

    Sitting in front of my Devuan ASCII loaded desktop i wonder about the secial advantage of a distrution like MX... XFCE is available on most larger distributons, especially al Debian derivatives...
  24. Replies
    21
    Views
    1,145

    Well, i needed to make a short break with this...

    Well, i needed to make a short break with this and hope I'll get back to it over the weekend.
  25. Replies
    21
    Views
    1,145

    All correct and not at all in contradiction to...

    All correct and not at all in contradiction to me. You can query for both current and voltage directly at the screen node.

    Veff^2/R can be done at the final load resistance and hence be used to...
  26. Replies
    21
    Views
    1,145

    Correct. That's why i called it "marketing...

    Correct. That's why i called it "marketing value". My problem is actually that the 2nd approach which was the attempt to do the correct formulation, in some situations gives reasonable values which...
  27. Replies
    21
    Views
    1,145

    And again - modeling something like the power on...

    And again - modeling something like the power on G2 of pentodes is important but estimating that power is hard to do manually.
  28. Replies
    21
    Views
    1,145

    fails. Or i did not guess the syntax correctly.

    fails. Or i did not guess the syntax correctly.
Results 1 to 28 of 277
Page 1 of 10 1 2 3 4