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Old 21st February 2011, 12:33 PM   #9981
SY is offline SY  United States
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Originally Posted by scott wurcer View Post
With Bob there's a difference between contemporary and peer.
Oh, OUCH!
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Old 21st February 2011, 12:41 PM   #9982
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This thread is starting to get old.............maybe it is time for Blowtorch III or is it time to shut it down?
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Old 21st February 2011, 01:22 PM   #9983
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This thread is starting to get old.............maybe it is time for Blowtorch III or is it time to shut it down?
Disagree Jam, the realities of LP reproduction mentioned just this last week or two is some of the better stuff of the last two years. And besides we are approaching 1000 pages.
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Last edited by scott wurcer; 21st February 2011 at 01:24 PM.
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Old 21st February 2011, 01:31 PM   #9984
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Hi Scott,

I can't disagree with you on that point but sometimes the noise and back stabbing become unbearable. This thread seems to polarize members for some reason.................surely the opposite of the goals of the forum.

Regards,

jam

Last edited by jam; 21st February 2011 at 01:34 PM.
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Old 21st February 2011, 01:45 PM   #9985
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Originally Posted by simon7000 View Post
Having briefly worked with a few of Nashville's top recording engineers I can tell you first hand they have the recording skills and hearing ability that is strikingly impressive. You may not like ballads about losing, your truck, job, wife or spending time in jail, but don't dismiss the skill!

As to wet cleaning records, let's take a brief look at how you stamp a record. After the original master is cut it is used to make a stamping master (or negative) by several different methods, most of which involve covering the surface with graphite or some other compound to make it conductive and then doing an electroplate to copy the grooves.

Even if that were perfect the master is now mounted on a heated platen, sprayed with a thin film of Polyvinyl Alcohol to keep the hopefully virgin (meaning containing all new material and no reground stuff or other filler) vinyl from sticking too hard to the master. This is pressed into the vinyl, where the vinyl gets the impression.

You take it home and wash of the Polyvinyl film that actually was in contact with the master stamper and wonder why the sound has changed?

Gee, no wonder once you play it wet you keep having to play it that way. So the issue is not how vinyl deforms under pressure but how the PVA coating does!

ES
The first stamper (the mother) is usually used to make sons ( inverted ) and the many daughters to press the records, since tehy wear and after 5'000 pcs they shoud be replaced.

No chemicals are usually used to release the record from the stamper, the temperatur coefficient of metal is different than vinyl, so it shoud release by itself , since records have to be cooled down somewhat before release.
*pling*

Any chemical release stuff and that stuff would stick onto the diamond stylus, because the stylus gets hot while playing. So you have to clean styli permanent. Also do the record get hot, but its for extrem short time only on a specified point, the elasticity if vinyl will survive this without problems.

Wet playing modifies the elasticity module of vinyl. Be it pure water or alcohol or whatever. Furtermore any tube cantilever has a capillar effect, soaking up the liquid, cerating other problems.
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Old 21st February 2011, 01:48 PM   #9986
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Wet playing modifies the elasticity module of vinyl.
Really? Data?
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Old 21st February 2011, 02:01 PM   #9987
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This thread is starting to get old.............maybe it is time for Blowtorch III or is it time to shut it down?
Shut it... (jam, you I mean, not the thread) .
Lots more about phono pickups to come.

Eric.
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Old 21st February 2011, 02:03 PM   #9988
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Bob Pease was told by someone else that Ron Quan was present at the meeting. This is when I heard Bob Pease say something strongly negative about my colleague of 33 years, Ron Quan, in reference to PIM, I'm pretty sure. This is when I stepped in, and gave him the challenge that since I GAVE Ron those awful ideas about TIM, (our TIM paper had just been given in NY, when he first came to work for me, and PIM came out of our subsequent conversations, that he should go after me, first. He backed off quickly, perhaps in politeness to avoid an incident. I don't know, nor care. He first insulted ME to my face 25 years ago, AND I never forgot it. However, that doesn't mean that I don't recommend his book: 'Troubleshooting Analog Circuits'. I have a copy, myself. I will learn from anyone who can teach me, and I will defend my colleagues who have been impugned by others, unfairly.
Where were you Scott? I was told you were coming.
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Old 21st February 2011, 02:08 PM   #9989
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As far as Kirkwood Rough is concerned and his library: I pulled the 1941 edition of the 'Radiotron Designers Handbook' to page 43 or so, and showed Kirkwood that 7th harmonic distortion was taboo then, as it is today. They had a special statement about it is being completely unmusical and that it MUST be designed below audibility. Check it out, all!
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Old 21st February 2011, 02:18 PM   #9990
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Well, I hope that you ask Bob Pease directly what happened, and report back.
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