vinyl record hole off center

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#62
Destroyer OS said:
I think you're not understanding mine. I get what you're saying, but what I'm saying is that a much, much lower resonances is very apparent when you can "hear" it. It's a contrast of the significance of 0.55Hz.
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There's cause and effect, in this case they are not separated. You can brick wall filter your phono at 20Hz but the 10Hz FM on everything is still there. I thought we were talking frequency wander on a piano not simply additive low frequency noise.
 
#64
Hi Bill,

Guess I've been awfully lucky so far -- never had one that was different A to B. Maybe the press halves are better aligned than the hole punch. Come to think of it, I don't even know what the sequence of operations might be. Can anybody here enlighted me?

Regards,
Rick
 
#65
Hi Scott,

It'll take some careful listening and watching the tone arm. At the lower pitch and tone arm movement toward the center 'peaks', capture a mental image of the label. Use a pair of tweezers to poke the test strip in sticking straight up. Turn it back on and listen/watch again. It isn't too hard to get it close after a couple tries. The only obstacle remaining is that the brass won't want to accept the 3 dimension curve -- you may have to use a tapered pencil shank to press it a little flatter. Sure its a bit tedious, but at least the process doesn't have to be repeated every time you want to hear that record.

Regards,
Rick
 
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#69
Love it -- makes me wish I had one (the USB microscope) . .

Oh and, Scott: I've wanted for a good while now, to have a decent excuse to tell you how much I like your 'sign off quote', if that's what its called -- the question of 'Who, vs What, is right', and their relative importance -- excellent observation on the human condition ..

Regards,
Rick
 
#71
scott wurcer said:
There's cause and effect, in this case they are not separated. You can brick wall filter your phono at 20Hz but the 10Hz FM on everything is still there. I thought we were talking frequency wander on a piano not simply additive low frequency noise.
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I just find it is hard to get people to understand the significance of something, if they cannot relate to something that gives them an impression of significance. It’s not easy to comprehend what these low frequencies are doing for everyone.

The 0.55Hz is s fun little puzzle to solve, if possible. But who knows, maybe people won’t like it solved?
 
#72
billshurv said:
I did find a video one showing how they locate the point to press the hole. Must try and locate it again. A do once then always fixed solution is always good.
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I've seen what I presume is the same video, perhaps linked to in another diyaudio thread, on "how records/LPs are made" or if it's a recently made video, it may be titled "how vinyls are made."
 
#73
Destroyer OS said:
But who knows, maybe people won’t like it solved?
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Hmmm, I doubt that - there may be ambivalence in the general listening population, but not preference for included 0.55Hz FM.

It's possible that FM arising from cart/arm resonance is euphonic, around the 10Hz region, or from cogging at slightly higher frequencies. But even then I doubt it, and in the cases I've worked on demonstrable improvements to pitch stability from all sources and at all frequencies below 50Hz correlated with enjoyment of the end result. Especially so for people with finer rigs, and I think this makes sense.

It is, after all, an attention to detail.

LD
 
#74
I think still that a manual method by watching the tonearm movement and adjusting by light pushes works quite good. It requires a felt mat or similar so the record can slip while pushing it and also that the hole is somewhat bigger than the spindle. It takes some few extra seonds of work.
 
#75
Yes, that's what I do if there's enough clearance between record hole and spindle, as there often is. The problem is often is simple as this clearance, I think. Maybe then a taper on the spindle and a spring so that the spindle pushes up and centres the record, then some kind of centre clamp that holds the record down might do it?

Separately, IMO there doesn't seem much point in exotic platter motor speed control unless this is right (!)


LD
 
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