orangetang
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Got it, thanks. It's being painted right now... Will look much better!
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Nice turntables. Attached picture is an absolute requirement.
- Thread starter DanielT
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Anybody that has an idea about the negative overhang on the GT-5000 ? - Somewhat off topic, but I am sure there's interesting information on this...
Yamaha GT-5000 – Tech Reviews
www.lbtechreviews.com
Underhung has become a thing in the past few years. I've heard that it was originally done for scratch DJs where the the "back cue" would cause a reverse skating force which could be a problem on an arm that had AS. As is usual many reports of sonic bliss but no one will put any evidence forth.
I have to admit, I sort of missed that - just stumbled over the article which I posted on the GT-5000 - and it doesn't give much of an insight. Then again, I hold Yamaha in some esteem - and I will see if I can dig deeper, they must have had reasons to do it that way. The arm could have been easily designed differently. Maybe someone who owns a GT-5000 has at least experience to share.
Edit: VIV Lab seems to go in that same direction, certainly the shorter version of their arm. A little expensive to have one for trying it out, though...
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I remember when that 'table came out there was a lot of discussion about the UH arm setup, but I don't recall seeing any pros that outweighed the cons. Admittedly, I didn't pay it much attention.
GuidoK
Member
If you calculate the tracking angle error, it's so big that that alone creates a significant portion of antiskating. Tracking angle error can rise easily above 10deg which would indicate that an arm like that should have it's own AS mechanism (that would need to change it's force in direction when the arm crosses the 0deg tracking error)
This is an estimation of the gt5000 arm tracking error angle (depending on where you put the 0 alignment). It's roughly 6 times as bad as your typical 9" tonearm:
This is an estimation of the gt5000 arm tracking error angle (depending on where you put the 0 alignment). It's roughly 6 times as bad as your typical 9" tonearm:
If you calculate the tracking angle error, it's so big that that alone creates a significant portion of antiskating. Tracking angle error can rise easily above 10deg which would indicate that an arm like that should have it's own AS mechanism (that would need to change it's force in direction when the arm crosses the 0deg tracking error)
This is an estimation of the gt5000 arm tracking error angle (depending on where you put the 0 alignment). It's roughly 6 times as bad as your typical 9" tonearm:
Appreciate it - the article makes that statement - 10 degrees error, but of course stops getting into any usable info... Yamaha seems not to be concerned about that fact
But, this is getting probably too much off topic, might be wise to see if that fits better with the Vinyl measurements thread... My fault, I admit it.
Cheers
I don't know negative overhang from a hangover, but it sounds great to me. I'm running it with a Ortofon Quintet Black MC. They pass every test on the Ortofon test LP.
Higher distortion and worse crosstalk, more phase offset if using an elliptical or line contact stylus.
I suspect given LPs are neither low crosstalk nor low distortion in the first place many people won't notice
After all there are plenty of enthusiasts who consider LPs a superior medium which means many people's acceptable noise and distortion thresholds are nowhere near as high as is often thought.
Bland_username42069
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The last run of the Technics 1200G so if you’re a shellac fan and crippled with audiophile neurosis this sounds like your last chance
DSJR
Master Contributor
How's your main bearing thrust plate? I'm very much haunted by early examples of these that wore them out in months, the recommendation being to rotate said pad a little once or twice a year... maybe they changed it in subsequent years...
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Moti
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Thanks for your comment. This is first time I hear about the issue. I do not understand how rotating trust plate makes any difference since the bearing in the tube is always in the same exact position? But I will check this when de-assempling the sub frame next time.
The main bearing size is bigger in Mk4. It needs to be lubricated well. The only maintenance has been belt- and spring adjustment plastics replacement time to time and oil change in 2006.
DSJR
Master Contributor
The thrust plate is the stationary plate/disc at the bottom of the bearing that the hardened end of the main spindle sit and rotates on. I don't think the early ones were lubricated, so pleased that yours is and forgive me associating later examples with the early one that started it all
EERecordist
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I have an interest in disc cutting lathes, though I have not used one. There is a gentleman in Greece as Agnew Analog who machines lathes, a turntable that can be converted to a lathe, and rebuilds lathes and cutter heads. He also works on all manner of old gear.
agnewanalog.com
The motor is in the fine furniture cabinet below the turntable. I would try to do more vibration isolation. IMO good choice of the classic SME3009 arm. Maybe we can start a trend in high end turntables of a video microscope tracking the groove and showing it on a screen? You heard that idea first on ASR!
Old school precision machinist at work:
www.youtube.com
Agnew Analog
Disk Mastering Lathes, Vacuum Tube Electronics, Analog Tape Machines, Precision Machine Tools, Film Photography, Laboratory Measurement Instruments, Optics
agnewanalog.com
The motor is in the fine furniture cabinet below the turntable. I would try to do more vibration isolation. IMO good choice of the classic SME3009 arm. Maybe we can start a trend in high end turntables of a video microscope tracking the groove and showing it on a screen? You heard that idea first on ASR!
Old school precision machinist at work:
Agnew Analog
Analog Audio, Disk Mastering, Tube Electronics, Machine Tools, Film Photography, Optics, Metrology.
www.youtube.com
Robin L
Master Contributor
This popped up in my Facebook feed this morning. Nine years ago, I found/bought this Technics SL-D2 at Amvets in Fresno, $50. One of the best, most functional turntables I've owned, equipped with a Shure M44-7 cartridge, perfect for staying in the groove of damaged records. Beauty is in the eye of the beholder, and for me, this one's a beaut. The record on the right is the Australian Jazz quartet, FWIW.
I have to have a lid, I despise intricate dusting & I can't blow it into the air with air pressuse & vacumn it up later due to my wife's allergy's.
But, those are wonderful TT's.
Robin L
Master Contributor
I have been looking for a less than expensive lid for a clients table - this seems like worth a try.
Cheers
Cheers
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