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psarkissian

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Everything posted by psarkissian

  1. psarkissian
    There would be some notes or labels on the packaging. Both 50-Ohm mic cables and 110-Ohm XLR cables adhere to AES/EBU, ANSI, ISO and ITU standards. And the better brand cable makers also have markings on the cable regarding that. If you don't know what you're getting, hold off until you do, or find one that is correctly marked and labelled.
  2. psarkissian
    I don't see it registered under your user name. Do you have more than one account? The reason for contacting customer support is that they are the ones who would issue a replacement if they okay it. A guitar VDI/USB is a simple thing.
  3. psarkissian
    As to question #1,... no. They are okay for the older version Variax. But JTV's,... the earliest that would work would be an X3 Live. And that was with the earlier JTV firmware only. The later firmware is just with the VDI/USB interface. Make sure you JTV-59 is registered, then get in touch with Customer Support.
  4. psarkissian
    It has to be 110-Ohm cable for Line 6 Link,... and not 50-Ohm. That is a must, and there are no substitutions, or there will be problems down the road. It has to do with impedance matching, those are the rules of physics. abaxe,... good question. And the only stupid question,... is the one that is not asked. There should be something about cables, usage and impedances in the Knowledge Base section of the Forum. For those who want to get deeper and better informed about cables, usage and impedances,... check out books by Steve Lampen of Belden Cables.
  5. psarkissian
    Two kinds of cable here,... - XLR 50-Ohm for mic cable use. - XLR 110-Ohm, AES/EBU, for other uses such as Line 6 Link. These uses are not interchangeable. It has to do with impedance matching between devices. Do not use 50-Ohm mic cable for use as Line 6 Link.
  6. psarkissian
    "Is the JTV 1/4" output a TRS of some kind?"--- Yes. More about that in the Knowledge base. TRS:: tip= signal, ring= +V, sleeve= return. It's like that with many guitars with active circuitry.
  7. psarkissian
    XLR is a balanced line, and the 3rd line ties to the shielf for chassis ground. 50-Ohm XLR is for mics, 110-Ohm XLR is for L6 Link. TRS guitar is for guitars with active electronics like a Variax or JTV. Because of impedance considerations and its affect on cable performance, many of the afore mention cables have length limits. So don't go beyond that.
  8. psarkissian
    FBV mkII does the USB to RJ45 interfacing. Monkey for firmware updates and Spider IV Edit for other things. Checkout,... http://line6.com/software/index.html ... for available downloads.
  9. psarkissian
    Correct.
  10. psarkissian
    There's a risk of damage to some components. Regulation circuit won't like that over time. They will get stressed over time. When you plug in the TRS, the battery is engaged. Together with the XPS,... not a good idea.
  11. psarkissian
    Take the battery out. TRS cable engaging the battery AND using the XPS power system would result in a voltage doubling that can damage something.
  12. psarkissian
    TRS:: Tip/Ring/Sleeve in an active circuit like this is typically use for signal, +Vdc and return (or some analog circuit common or ground). Over long lengths, there can be a sag in the DC rail and/or a resulting change in the impedance. Change in impedance can contribute to hum noise. DC regulation can do only so much. So yeah,... snhirsch has got it.
  13. psarkissian
    15ft TRS to the XPS is normal, keep it there. If you're going to go for a longer length, make from the XPS to the amp, and try to that length down to about 25ft. Don't go beyond 30ft.
  14. psarkissian
    Was the repair person a Line 6 authorized repair? Log a support ticket in your account and make sure your device is registered in your account.
  15. psarkissian
    As usual,... nice job Steve. :)
  16. psarkissian
    Wrong tubes. Stick with the specified Ruby 6L6GCMSTR for the power tubes. JJ's are nice tubes, just not in these amps. The gas to vacuum proportions isn't spec for these amps. Same goes for Mesa and Groove Tubes. As a result, the 350mV bias would be incorrect. You just don't use the same bias on a different tube. It's a combination of the characteristic curve variation between manufacturers, what the gas to vacuum proportion is, the gain structure of the circuit, and the correct bias for those specs. These are not the tube amps of old. You can't willy-nilly swap and bias tubes and then expect it to work correctly. There's more to it than that. Stick with the specified Ruby's. Have an authorized service center deal with it.
  17. psarkissian
    <p>Wrong tubes.</p> <p>Stick with the specified Ruby 6L6GCMSTR for the power tubes.</p> <p> </p> <p>JJ's are nice tubes, just not in these amps. The gas to vacuum</p> <p>proportions isn't spec for these amps. Same goes for Mesa and</p> <p>Groove Tubes.</p> <p> </p> <p>As a result, the 350mV bias would be incorrect. You just don't use</p> <p>the same bias on a different tube. It's a combination of the <em>characteristic </em></p> <p><em>curve</em> variation between manufacturers, what the gas to vacuum proportion</p> <p>is, the gain structure of the circuit, and the correct bias for those specs.</p> <p> </p> <p>These are <em>not</em> the tube amps of old where you can willy-nilly swap tubes, use</p> <p>then use the same bias and then expect it to work right. A lot more going on</p> <p>here than swapping and biasing tubes.</p> <p> </p> <p>Stick with the specified Ruby's. Have an authorized service center deal with it.</p> <p> </p>
  18. psarkissian
    Sounds like it. Once I see photos, I'll be able to shed light and get more specific.
  19. psarkissian
    Should be a JPEG, 2MB or less.
  20. psarkissian
    Not certain,... hence the reason to want to see photos. I've done a couple of customized 69's for a couple of my colleagues here at Line 6. But this wouldn't be one of mine, ... isn't using Duncan single coils. Sounds like a good deal on a nice guitar, that can use a tweak or two.
  21. psarkissian
    Have a photo? Of that and the rest of the guitar. It was Hi-E slip, due to an old fret spec. It didn't involve the US versions. If it's the low-E, then something else is going on here,... maybe neck wasn't aligned during whatever work was done on this. Odd,... a US guitar with a Korean cut version pick-guard? And custom pick-ups? A series of photos would be good for me to better evaluate this.
  22. psarkissian
    http://line6.com/support/manuals/spiderivhd150 the "Edit Basic User Guide".
  23. psarkissian
    I know. It's probably a nostalgic. retro kind of thing. I prefer rod nuts at the head-stock myself. But still, those US version JTV's are pretty good.
  24. psarkissian
    Should be a crescent shaped cut-out on the pick-guard to access the rod nut on the US 69 models. Should never have to unbolt the neck to adjust a rod. Aside from the afore mentioned things that "cruisinon2" points out, pulling off the neck and back on again to adjust a rod,... ... is a great way to warp the neck over time.
  25. psarkissian
    "There's absolutely NOTHING repeat NOTHING proprietary about the subject of this OP. The principles and algorithms behind the kinds of DSP EQ used out there are widely available and taught in every university's electronic or DSP related engineering courses"--- ... and Julius Orion Smith III teaches DSP of digital waveguides, Karplus/Strong and modeling at Stanford. And has done some cool papers for the AES journal (JAES). my pal Josh Reiss from QMUL also teaches this stuff about digital audio. What they teach isn't proprietary, but what Line 6 does with it,... is. ---Even I don't know how they do it. A filter with zero phase with less coloration, Smith's book has a good chapter on stuff like that (Bessel or Allpass filters), and my pal Josh Reiss from QMUL has a book on audio effects where he gets into Allpass filters. Another colleague, Stanley Lipschitz from Uni of Waterloo, ON, Canada, also did a cool paper on Allpass filters (a more analog approach). All cool stuff. When you try this yourself, remember to keep the filter poles and zeros inside the unit circle, and keep the reins tight on the gain stages, so it won't self oscillate. A general rule of thumb when it comes to filters (analog or digital). Might want to do an Idea Scale request entry for the "EQ block" you're looking for.
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