John Curl's Blowtorch preamplifier part III

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#14,841
billshurv said:
Camera is no use. You need to do an analysis of the oil and any particles therein. People who maintain serious engines do this. Pleasure Vehicles as Sir Harry Ricardo called them do not warrant such care. The Engines in the trains that take me to London for example had around 7 million miles on them at upgrade. At that life expectancy you check oil very carefully.
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I used to actually read the lubrication industry journals long, long ago.

"Synthetic" oils like Mobil 1 are so much better than even modified normal oils that in normal automotive use the engines effectively see no wear in lifetimes of 250,000 miles.

In my turret press we use such oils as the normal wear out mechanism is main bearing wear. A unit that costs $185,000 new sells used to the unwary for $5,000. It is often listed as still under power, but the cautious would examine the sides of a punched hole edge for uniformity of the parting shear wear on multiple holes at different places in the test sheet and at different speeds.

Now I wonder what is the economic benefit with a turret press of using a lubricant that provides at least ten times less wear?

Not as great as expected as the manufacturers don't want to stock service parts for 20+ year old machines.
 
#14,844
Tournesol said:
It was a very amusing moment, typical of the behavior (I'm polite) of this brunch of so called "objectivists" on this forum.

I shared a personal recipe of apple pie:
"Long time ago, I had glued lead sheets into my CD player with double-sided tape on the CD mechanic assembly. Measuring the voltage on the tracking motor of the head was enough to see a VERY noticeable improvement."

That you could translate like: "I used to add a little pinch of baking soda to the sugar and found the pastry lighter".
Note that i took care to do not claim anything like "better" taste, only saying that I could measure more volume for the same weight."

The guru of the academic cook comes here immediately, sayin' that there where nothing to improve in the original recipe of his grand mother.
One of his faithful came behind to explain to me that he can repeat the traditional recipe ten times and get the same cake.
Another questioned me about the number of air bubbles per cubic centimeter of cooked pasta.
One Another came to *order* me to have physico-chemical analyzes of my recipe carried out by a laboratory.

Oh Lord !!!!

Reading the list of the people I suspected to belong to this strange and ridiculous academy (My personal ignore list), it happened that they were all listed in it. I added the stamp "confirmed".
N.B, as the guru often provide highly valuable inputs and I learn sometimes interesting things reading his posts, despite the fact that he does not always behave with the elegance of a gentleman, he is not part of it.

As well, i'm jut bored to assist in this thread to this permanent firework of "Claim", "Provide datas", "show evidence", "bring proofs" and other requests to provide a demonstration work asking the week of work that requires an AES print, when it is so easy to make an idea by oneself that requires three minutes of DIY. Or simply ignore-it when no harm expected.

Most of us, here, have enough of inteliability, technical knowledge and experience in sorting between the wheat and the chaff. Who of us need a court of pseudo-politically correct experts to tell us what to think at each moment ?

Let-me conclude sayin that, tasting dishes in a restaurant does not make you a wizard "subjectivist" practicing black magic and selling poisons on the nights of full moon. As far as I can see, most of us are graduated from a cooking school or/and spent their lives behind the stoves... and restaurant tables.

A little intelligence, a little weighting and respect for others, a little less preconceived ideas about other contributors value would be very welcome. And even so, Douanier Rousseau has its place in museums.

Have fun.
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Max Headroom said:
Any idiot knows that changing tracking motor/tracking coil currents will cause a bunch of associated effects like altered power supply rail noise, altered earth reference noise, altered clock noise, altered data slicing points etc etc etc in the typical cd player.


Anybody with understandings of the details of system implementation and operation would assume or know typical CDP vulnerabilities and would not question the initial statement.

T, yes I know the same responses from the same 'types' gets boring.


Dan.
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I get the impression that you don't enjoy the actions on this forum. In that case, do you have future plans to try other forums?
 
#14,845
simon7000 said:
"Synthetic" oils like Mobil 1 are so much better than even modified normal oils that in normal automotive use the engines effectively see no wear in lifetimes of 250,000 miles.
.
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I sold my last car at 290k miles. My only measure of bore wear was oil consumption which was still 1 to1.5litres per 10,000 miles. However it needed a lot of work on other bits (clutch, timing belt, head). Had I had a garage and the required Skillz I would have kept it as the last of the semi-clockwork diesels.



Note Mobil 1 has been around since 1974.
 
#14,846
Evenharmonics said:
I get the impression that you don't enjoy the actions on this forum. In that case, do you have future plans to try other forums?
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It is not the forum, but the way *some* contributors use-it to vent their aggressive nature and feel themselves as the place's referees.
Holders of the absolute truth.
Guess who ?
Clue: there is no even without an odd.
Better to end about this subject: I do not expect any improvement.
 
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#14,849
billshurv said:
I sold my last car at 290k miles. My only measure of bore wear was oil consumption which was still 1 to1.5litres per 10,000 miles. However it needed a lot of work on other bits (clutch, timing belt, head). Had I had a garage and the required Skillz I would have kept it as the last of the semi-clockwork diesels.



Note Mobil 1 has been around since 1974.
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My cars at 250,000 miles using Mobil 1 use no oil between changes at 20,000 miles. Bigger country drive more. Have had 4 cars so far to do more than 250,000 miles.
 
#14,851
"So congratulations you have well implemented power regulation and grounding schemes and your preamp is immune to outside influence such as AC mains quality."

So, maybe it isn't the ferrites, but crappy power supply and grounding schemes after all, which I alluded to in an earlier post.

BTW, how do you get a 'subjective' opinion on LF and sub-sonic sounds that you mentioned in your penultimate post?
 
#14,852
The factory spec was that 1 quart in 1000 miles was ok from new, so I was happy with that. I also drove it like a rental and it was erm, above stock HP by about 30%. Oh and you couldn't use Mobil 1 in it as needed special oil that was luckily cheaper 🙂.



But modern engines and good oil are amazing. Hands up who can remember their dads/grandads having to change gaskets during a decoke once a year 🙂
 
#14,854
scottjoplin said:
You?
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What do you think ?
Have you seen me often answering "Incorrect" or "untrue", ask someone to provide a DNA profile of each fly he talks about, ask someone to burst his four eyes twice before sharing listening impressions, or implying that he was under the influence of hallucinogenic substances or escaped from an insane asylum?

If so, you were probably under the influence of hallucinogenic substances ;-)
 
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#14,855
Still find it a bit baffling why CD players get discussed... They are way obsolete.
I've not had one for years - nor have any of the serious audio spenders I know... It's all on disk, backed up, etc, as Bill has noted...

Max - much as I enjoy your contributions, you have been promising measured data to go with your subjective findings for some time...

And, as engines have drifted into the dialogue - having just perused one of the car club magazines, I'm saddened to see the wee tinny blobs as fuel "catalysts" are still advertised... Sigh...
 
#14,859
Tournesol said:
What do you think ?
Have you seen me often answering "Incorrect" or "untrue", ask someone to provide a DNA profile of each fly he talks about, ask someone to burst his four eyes twice before sharing listening impressions, or implying that he was under the influence of hallucinogenic substances or escaped from an insane asylum?
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I haven't. Also, I haven't seen anyone doing such version of answering on audio electronics related topic.
 
#14,860
simon7000 said:
I used to actually read the lubrication industry journals long, long ago.

"Synthetic" oils like Mobil 1 are so much better than even modified normal oils that in normal automotive use the engines effectively see no wear in lifetimes of 250,000 miles.
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Gross oversimplification. "Mobil 1" refers to hundreds of products made with all kinds of different techniques, base stocks, and additive packages over the last 40+ years. There are also plenty of parts that still wear with "Mobil 1". The very definition of synthetic oil is also a gray area. Most synthetics are now Group 3 base stocks created via GTL process.

You can find modern information at the BITOG forum, a number of tribologists frequent it.

Passenger Car Motor Oil (PCMO) - Gasoline Vehicles - Bob Is The Oil Guy
 
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