psarkissian

Yes. And there are a number of reasons for that to occur.

No, not getting screwed buying online, but it does add a certain randomness. There are those who buy online and have never had a problem. And I know that places like Sweetwater do further checks on these before they let them loose to the public. Just making sure people are aware. You sound like you're more aware than most. :) Glad that you got one that suite you. Don't need the name or number of the shop. Any shop or dealer return in the Americas will eventually come across my bench.

Every guitar I've ever owned (including my four JTV's) I spent time playing it, getting to know it, then I buy the one that's in my hand. Not the new one out of the box from the back store room. And I've never had a problem with any of them beyond the usual maintenance and up-keep. Some I've had for 40-50 years and they still play great. Lemon has little to do with it. A black box thru mail or online is one thing, getting a well kept Stradivarius thru mail or online is a coin toss. JTV's go through a final set-up at the main distribution point before they go to the retailer. And the retailers are all over the country. And the country has different climates in different places. And climate will eventually have some affect on the set-up. Every guitar that comes across my bench, gets a spec set-up, then I make adjustments for the climate of the end destination. Better known, high profile players will with their own roadies or crews, and will have a tech to do set-ups and such on a tour because of that. I know, it's what I used to do. And not just guitars.

I know what you mean, got a bum left shoulder and elbow myself, so I'm careful about guitar playing. Just be careful when the set-up is adjusted. any neck relief has to be done in increments and let it sit a day or two before making any further adjustments to neck relief. There's a high profile player who tours a lot with a number of people, and during the tours didn't give his JTV-59 enough settle in time after a neck adjustment and not small enough increments of adjustment. It result in a crack in the finish of the heel joint area. Didn't penetrate the wood, but the finish had a hairline in it. It's rare, but it has happened. So be careful when having someone adjusting the set-up after stringing with 11's.

Not angry,... more like oddly amused. But you would have to know my history and background to appreciate that comment,... but it's way too lengthy a history for me to get into here. "Maybe it complicates the cores/wrap wire of string and also mechanical properties of the bridge"--- ... wound strings do complicate it. L-wave in a string is basically a Newtonian oscillator bound by Newtonian/Galilean mechanics and Pythagorean intonation proportions. How they are tied and tightened at either end will play a role in things as well,... also needs to be considered. There are players out there who have gone to string sets starting with 11-gauge, for the purpose of getting a certain tone for playing "heavy metal" music. I always tell them to get the set-up adjusted for the tension change. It seems to do well for them... for that genre of music. If I recall, our own Sean Halley (the guy who does our demos and videos), last I talked to him, strings his JTV-89F with a set the starts with 11-gauge. And of course the set-up was adjusted for the change in string tension. 11's on a JTV-59 work fine, doing set-up on a JTV-59 with a set starting 12-gauge is a bit of a challenge, but I pulled it off okay. Needed an extra day of neck settle-in, but it worked. I have seen this a couple times before, where the wound or "wrap wire" strings were a problem. They ended up trying different brands of the same gauge until they found the right one for them.

http://line6.com/find/service_center/ ... is a good place to start for Line 6 authorized service in your area.

Looking at longitudinal waves,... I guess tha would depend on the elasticity of the medium. There are a number of variabes in the workings of a guitar that would counter L-waves. Siemic motion of earth quakes, surface acoustic waves (SAW) in microwave communications, ocean waves, solitons,... those are more likely when you consider the elasticity and density of the mediums the wave is travelling through, of the afore mentioned circumstances. L-waves are more in keeping with the engergy levels requred to generate L-waves. It's also more in keeping with acoustic violin construction research. Putting body tops and backs on vibrating tables to look at wave modes. With musical instruments, any L-waves would be more in keeping with hollow body. I'll need to look deeper into any research with solid body intruments. From your sound clip, there sounds like a secondary vibration that is getting picked up by the piezos and being processed. Whether it's an L-wave or not, don't know, they require significant energy. For a guitar, I would need a vibration table to confirm that. Not something we have in the service department. I'll have to get some else around here for that. I know about L-waves in the afore mentioned areas from first hand experience, part of my studies in college. Untrustworthy?? My colleagues don't think so. I've been studying waves of all kinds for 50+ years. And a number of my colleagues are in AES and IEEE (as am I). There are way too many variables to be looking at only one thing. We need to look at all the vairables and eliminate them as a cause, until the root cause s found.

The tube with a 10 volt bias has a problem. The amp needs to be taken in nd checked out. Maybe it's nothing more than a failed tube, maybe it's something else. Needs to be checked out by a tech who knows the product, preferably an authorized tech.

D'Addario NYXL,... interesting. Elixir Nanoweb Light strings(10-46 I think),... Just replaced a JTV-69 neck for someone earlier today and strung it with Elixir Lights that he supplied. I'll let you know how that comes out. ============== In the process of clocking out, I'll mull over the wave question over weekend and get back to you on that. I wouldn't fixate on any one thing, guitars have multiple ways of generating the same or similar symptoms, but from very different root causes. Surprised that your damping efforts near the head stock didn't help either. There was one guy once who over-did the damping and had a host different problems than you. I would think your damping efforts don't look like it's to that extent yet, so that good.

Try a 1/8 anti-clockwise turn at the Low-E bridge post. If it still distorts and frets, then give it another 1/8 anti-clockwise turn. No more than that.

Miroslav: Measure it at Fret-12. Use a 7/64 hex,... I forget what the metric equivalent is. "That simply can't be if swapping piezo inputs moves the problem and then the original string sounds fine."---- As I've said before,... each signal line is specific to that string. The A-string signal line wants to see an A-string on it, and not a low-E string. And before someone says that the processing doesn't know one string from another,.... yes it does know. "inherent to distorted and over driven patches and mechanical issues"--- I don't have this problem with my four JTV's. Mixing magnetics and piezos is different than just magnetics or just piezos. This is a different kind of cat, got to cuddle it under the chin a little differently.

Okay,... the JPEG shows you have USB and an ESN. Good. Looks like it might be related to the same IC chips as the person with the 3 LED problem,... but for a different reason. And with the age of the product, I would say that are some solder points that should be check over as well, by a Line 6 authorized service tech. If you have the 3 LED thing going there, then it needs to go into the shop, a Line 6 authorized one. There is a specific fix for that, service information that the Line 6 authorized tech will be able to access.

Check for the latest firmware updates, Make sure the tuner is not in audio bypass. You wouldn't believe how many people forget that's there. Even I've done it a couple times. For two of you, I would think it's time for a general overall check up at a Line 6 authorized service center. Check for any hardware and firmware updates,... ... especially if it's been some time and they haven't seen a service center yet. And thanks silverhead,... always on the ball.

Yes, that too,... Would've gotten downstream eventfully,... thanks for covering my back. :) You have the "guitar+aux" selected (or other inputs selected) at the input on the input edit page?

No,... not down. Adjust up at the Lo-E side bridge post by one-tenth of a millimeter. If it need more, then do another one-tenth of a millimeter. Do not go beyond two-tenths of a millimeter in total.

Here's an idea,... have the action adjusted up 1/10th-mm and see how it does. Don't go further the 2/10-mm Total. Since it's the Lo-E and A,... that suggests that the action on that side might need just a kiss more. It's a JTV-59, with a higher cut string nut (like a Les Paul), so there's a smidge of play there,... but just a smidge. So, don't over-stray from that. No more than 2/10-mm total,... just on that side. Then re-tune it. If it whistles or howls, then check the intonation. Preferably done by an authorized tech with the service info access.

The I would suspect the PC is the culprit. It shouldn't do that if the PC is adhering to FCC Rule Part 15, for interference. You may want consider springing for some better connecting cables, to and from the computer. Something isn't as well shielded as it should be.

Any florescent lighting being used? Wall outlet 2-pronge or 3-pronge?

I started with them in late August or early September of 1975 (left in 1979). So I've been getting paid to do tech stuff for 40 years this month. Glenn Falls 1975,... yes, I recall we've talked about this before.

Okay, an old, new tag line,.... "This is not a kitty-cat, it's a big cat, you have to cuddle it under the chin a little differently". ;) Came up with that one on my own,... better? :) Yes,... D'Addario 0.010 - 0.046 EXL110 Nickel Wound are the factory strings. If you decide to go with 11 to 48 gauge, be sure to have the set-up adjusted for that afterwards. It's less about the brand and more about the gauge of the set. Last time I talked to Line 6's Sean Halley (from the Line 6 demo videos) earlier this year, he informed me that he was using a string set with 11's for his 89F. He also had the set-up adjusted for that gauge and tension. I am old enough to be a grand-dad to most of the people in here in support. Anyone old enough to remember the rock band Iron Butterfly? I used to crew, tech and roadie for them. That's how far back I go. :)

String amplitudes will be different on different Models. For instance, the Lester in toggle-1 down position is one of the higher amplitude Model patches, while the Chime in toggle-2 is one of the lower amplitude Models. Banjos have a short attack and short release time. So I wouldn't take any of the amplitudes of patches as a reference for calibrating. But yes, take it in while the warranty is there. With different climates in the Euro acting on an instrument, it's a good idea to have a local authorized service center check it out. They will have access to service info. These aren't our grandfather guitars with passive electronics anymore. And mixing mags with piezos is touchy,... ... the specs have to be spot on.

This can manifest differently with an 89F, than with a 59 or 69, being different mechanics and piezo assemblies. -Set up could be a reason -if the locking nut "V" slots are not cut and aligned correctly (seen a few of those in rare occurrences) -Loose hardware allowing secondary vibrations to occur (seen a few of those, commonly mistaken for cross-talk) -Piezo being connected to an incorrect spot on the connector -Secondary, sympathetic vibration creating a distortion that gets injected into the signal -Changing string gauges, which changes the string tension on the neck, and not getting the set-up adjusted for it It's common to mistaken secondary or sympathetic vibrations from other strings as being cross-talk. Understandable since the differences are subtle. There are some differences in the reasons for such things to occur. And yes onkelfeix,... these piezos can be sensitive and they have to be set up in the correct order. The 89F piezos are not set up in the same way that the 59, 69 or 89 are done. The 89F piezos are set in groups, so they have to be installed to the correct positions and connected to their correct places,... .... even more so than with the other JTV's.

I concur with Charlie on both posts. And JTV electronics do not react well to a 9V rail.

Like wise.

With impedance mis-match and my knowing the circuitry inside,... there will be problems. It may work for a time, but the circuits will be stress and chances are high it will blow the amp circuits inside at some point. CB mics are not made for this application,.... I used to do CB radio back in the 1970's. This would require some serious mods and intimate knowledge of the audio circuit of a GX.