psarkissian

"Thanks for the info. Sorry you had to repeat it. I'm new to JTV and Variax HD and didn't dig into the old threads as much ad I could have"--- No problem. I'm here to help. There are a number of my responses to postings on this subject, a lot to sift through,... if you're so inclined.

"Apologies and I understand if you can't divulge this info, but are there different stock settings in the JTV Variax tech components to match the body/wood/construction of the JTV-69, 59, and 89 to deliver similar modeling results from the different guitar types"---- Models are all the same on all JTV's,... it's the Alt Tune, switching configuration and a couple other things that determines which guitar is which (electronically). You can't take a program board from one type of JTV and put it into a different type of JTV. It won't sound right or fully function. 69 with 69, 59 with 59,... put 59 board in a 69 and you'll have problems. If you get a spare board it has to be for the correct JTV type you have, or it won't work right. That's as much of it as I get into. I've mentioned this stuff in other posts.

It's most likely the fan. It's not typical, but it happens. Make sure the unit is registered, log a service ticket in your account. The right frequency, the right amplitude,... anything will self resonate. It's why Ella Fitzgerald could break a crystal glass with her voice in those old Memorex audio tape commercials back in the day.

Andertons, I hear good things about them,... say hello to Denmark St, Sloane Sqr and Theatreland for me, next time you're that way. Rock-n-roll.

Fortunately, whether from the distribution hub or my repair bench, going over the set-up and making adjustments where needed, is routine and part of the check-up before leaving our hands. We start from spec, then adjust for the location. It's a skill and we get it right most of the time. There's a trick and skill to it, doing a set-up for a geographical location across the other side of the country. Climate of the location plays a big part in it. Yes, piezos are a sensitive thing and pick up a host of thing in the signal. Erring on the side of high, on the action is okay under your conditions, just don't go too high or pitch shift can result if you fret a note hard at too high an action level. All about finding that sweet spot. Rock-n-roll.

Workbench HD,... is for JTV's with Firmware v2.00 or higher, and the new Variax Standards which already come with the current v2.21 Firmware. Any JTV's with Firmware before v2.00, uses the older Workbench. amsdenj,... btw, a set-up was done to the Variax Standard, done to spec then adjusted for your geographical location. Sorry it wasn't to your liking. If someone sends a guitar back and they let me know about some thing special like that beyond the normal set-up, I make a point to accommodate where I can. Thanks for feedback, it's helpful, thanks.

brue58ski,... we have a more permanent fix for knob bottom out, similar to what you had in mind. But your thing works to in a pinch,... for the knob bottoming out thing. Very good.

Sending back to me. If it's what I think it is, then I need to deal with it. Log a support ticket in your account.

A few very small dabs along the top edge of the knob with Krazy Glue,... carefully. don't get any on you or on anything else. Put the top cap back on. Let it set for an hour, before you put the top cap back on.

Pretty much. I start there and dial-in as it needs. JTV-59 is slight different.

For a JTV69,... 3mm on the Low-E side, 2mm on the Hi-E side. You may still need to listen to it and dial it in. Assuming you're using the stock pick-ups. Custom pick-ups is trial-and-error. Custom pick-ups,... give me the bulk resistance spec, and I can make an educated guess.

Gold plating looks like it's for the shielding rather than a conductor. But in the end,... what's the impedance? 600Mhz bandwidth is useful for video and CATV, but it still wouldn't be the correct impedance for that application which is why RG6 quad shield is still used for that app. It's all about impedance. There is also an aspect called velocity factor or velocity propagation that has to be considered as well. Since impedance is a function of frequency, there will be a sweet spot bandwidth range that would work best. It's optimal to use CAT5. Going hot rod in a parking structure is not a good idea,... unless you're in a Clint Eastwood/ Charlie Sheen action movie. I'll ask Steve about it today. I don't have much need for CAT7, even back in my audio/video install days. It's more for high speed networks far beyond what Line 6 products would use (way beyond our bandwidth). CAT5 is the way to go for FBV ports in a Line 6 product.

CAT6,... more twists than CAT5, tighter twists than CAT5, and so it uses more material over the same length. As a result, the impedance is different than CAT5. With a different impedance, comes a difference in data stream bandwidth range and capabilities. Got that straight from Mr Lampen of Belden Cables, when I saw him recently. And impedance is a function of frequency, which is a determining aspect of bandwidth ---- electronics theory 101.

"I used at Cat5, 5e, and 6. There is NO difference in sound, quality, feedback, buzz, or anything"--- Right, it wouldn't make a different in sound quality, since it's not for sound, and is for controlling the FBV. Having the correct cable will make a difference in how the FBV performs. As CAT6 is a different impedance. Check the links I cited. I had this chat with Steve Lampen at the AES Convention earlier in October. He's the King of Cables at Belden. Known him for some time now. He's the one I go to for info updates on this stuff. What BillBee said,... yes, always use speaker cables for speaker out connections to the cabinet. Using guitar cable creates a host of volume problems, because that is an even bigger impedance problem. Speaker cables are low-Ohms and come in several varieties, depending on power needs and applications. Guitar cable is around 1-kOhm, smaller signal power instrument cabling, not to be used for speakers. Best bet for the least problems,... use the correct cable for the correct thing, save yourselves some troubles down the road.

If Firmware fix doesn't do it, then there are the following possibilities,... - the piezo connection sequence is incorrect. - piezo not failed, but will fail. - aspect of the program that is not correct, this would require a circuit board swap and the original board sent to me for re-programming. - earlier version circuit board,... not likely, since the serial number is one that would have the current version board in it. In any case, the afore mentioned possibilities should be looked at by the Line 6 authorized service tech in your area, as they would also do the set-up on it and check out other aspects to make certain that nothing else is contributing to the root cause of any problem. http://line6.com/find/service_center/

Check the guitar Flash version on the Line 6 Monkey, it should be v2.21 firmware.

It's the fan in L2T.

Some Neve EQ's use passive filtering switching from one RC network to another using a rotary switch. Then adjusting the gain of that band by running the filtered signal thru a Voltage Controlled Amp (VCA). Gives good gain, and since the filters are passive and not active, the roll-off rate (dB/oct) is smoother, not a lot of ring points (ripple) or emphasis bump prior to roll-off. Yeah, Neve EQ's are nice. The VCA's are sealed, and they are pricey to replace. IR or emulation is less pricey, and gets very close to the real thing.

Is it like ending up on a fax machine phone line sound,... but with more of a whistling whine on top? http://line6.com/support/index.php?app=core&module=attach&section=attach&attach_id=4210 This is what's called a mixed signal device. It has analog, digital, RF and so on. If one of the return lines isn't terminated correctly, if the Tip/Ring/Sleeve points don't connect spot on, then a lifted ground return can occur. This ground lift allows the digital clock signal to demodulate down into the audio band. The digital noise or whining like a fax machine is a result. Not all guitars use the same jacks, and not all plugs fit to all jacks exactly spot on. If one of those tip/ring/sleeve (TRS) connections don't contact just right, the digital whine can occur. I've been coming across this for years, with a host of mixed signal products of one sort or another. Not all plugs will fit into all jacks exactly the same, check out the link regarding adapters.

"What you're describing may be the dreaded fan rattle"--- Yes. It occurs in some units. Something about the fan. It will need a fan swap-out.

The L2T will need to be serviced.

:D

Register the L2T in your Line 6 account, and then log a ticket in your account. Have Customer Support there email me, should they need it. It's not the guitar.

The MkII boards won't work in a MkI unit. And the combo boards would not be compatible in an amp head. Re-flowing solder around the DSP might, might help. Also re-flow around the RAM, Flash and clock circuit. The MkII Hd-100 is one I like better, mainly because of the Bank-4 models. Parts for those are still available for those, so I still service those. MkI (1st gen) are still serviceable, so long as it's not the black box problem.

And both of Steve Howe's DT50 sound nice. Had the pleasure of checking out and servicing both of his DT50-212's. They're real good. Yeah, those 212 ones are heavy.