Fw: [Amateur-repairs] Lubrication for a NOS rotary inductor?

[David Tanks]

  Don't let the title of this email fool you! The discussion of the title

  has evolved into the characteristics of various colors and their 

  properties of reflecting or absorbing heat. How this email came 

  about is a mystery, but thought you all might find it an interesting 

  read.

  David AD4TJ

----- Forwarded Message -----

From: jahman via groups.io <jah=alumni.pri...@groups.io>

To: "amateur...@groups.io" <amateur...@groups.io>

Sent: Tuesday, February 24, 2026 at 06:11:10 AM EST

Subject: Re: [Amateur-repairs] Lubrication for a NOS rotary inductor?

This is OT, but speaking of light and coatings, I thought I'd share this video I just cam accross on the EUV - Extreme-UV lithography machine, the most complex and most expensive machine ever made by humanity, bar none.  It took 30 years to develop, it costs $400 million and all your PCs, laptops and smartphones use chips made by this machine:

Dressed:

Undressed:

Key tidbits:

ASML - Extreme UV Lithography Machine (By Veritasium)
https://www.youtube.com/watch?v=MiUHjLxm3V0

1. ASML - Advanced Semiconductor Materials Lithography, the name of the manufacturer.
2. Extreme UV Lithography is X-Ray Lithography.
3. EUV is used today to make all of the important chips for computers and smartphones.
4. This machine took 30 years to develop.
5. EUV Makes chips with 13 to 5nm gate size.
6. Is currently being deployed at fabs with chip gate sizes down to 2nm.
7.  Mirrors use 1/4-wave thick (= 1/4-wave long wave-guide) to reflect the X-rays
8. The machines's collimating mirrors are so smooth if they were the size of the Earth the largest deviation from a perfectly smooth surface would be less than the width of a playing card.
9. One machine costs 400 million dollars, so start saving now.
10. To produce the X-Rays, the machine uses a sequence of 3 pulses of a 20KW carbon dioxide laser to convert a 10nm droplet of molten tin into plasma at a rate of 60 thousand droplets per second, soon to be 100 thousand droplets per second.
11. Silicon wafers are etched at a a rate of 2 per minute.
12. During etching Silicon wafers are moved back and forth with 20g acceleration.
13. One machine requires 12 Boeing 747 Cargo Jumbo jets to ship.
14. To collimate the x-rays, mirrors are pointed with pico-arc precision, meaning with this precision a laser could be aimed at will at either the left or the right edge of a dime... on the surface of the moon.
15. Manufactured chips can have up to 100 layers, so maximum permissible horizontal alignment error during layer stacking is less than the diameter of five individual Silicon atoms.
16. All smartphones have CPUs, DSPs and RAM chips made with this particular machine.   Same for all laptops and PCs.   Same for all AI chips made by both nVidia and AMD, because... ASML is the only company that manufactures this type of machine!
17. Therefore it follows you are now viewing this email and this video about this machine on a PC, laptop or smartphone thanks to chips  manufactured... by this machine!
18. This machine is without a doubt the most expensive, most complex and most important machine ever manufactured by humanity, bar none.

And here's the machine:

ASML - EUV Lithography Machine
https://www.asml.com/en/products/euv-lithography-systems

PINK FLOYD - Welcome to The Machine

https://www.youtube.com/watch?v=Jh20cMEgvqc

73 de Andrew/N5ASE

-0-

On Mon, Feb 23, 2026 at 7:48 PM J. Andrew Hall <j...@alumni.princeton.edu> wrote:

"The SURFACE of a material can increase or decrease the heat radiation."

Also applies to surfaces with light, also an electromagnetic wave albeit at a much higher frequency even than IR.

We all have specially-coated transparent materials to avoid reflection and to correct for color in the lenses of our smartphones.

At the air to plastic interface where light enters the lens the lens is a receving antenna; where light exits the lens at the platic to air interface the lens is a transmitting antenna.  The lens itself would be an in-band repeater/wvae-guide.

73 de Andrew/N5ASE

On Mon, Feb 23, 2026 at 6:24 PM FLYaDIVE via groups.io <FLYADIVE=GMAI...@groups.io> wrote:

Hello Larry,

I have been in the QA Manager field and directly related to quite a few aspects of the automotive field for decades.  My first introduction was with a company that was the original developer of Air Bags for cars.  My second was indirectly through a company that did all sorts of metal coatings.  Yes, I am familiar with E-Coatings, we did not do submersion, we did a Spray coating.

YES I agree with all but your last statement that an E-Coating will increase Radiated Heat.  E-Coatings are  extremely thin, in the micron range, but the ratings of radiation are less than 1.  One(1) is full radiation an Zero(0) is an insulator.  These numbers are related to a comparison of the same material coated vs un-coated.  The huge advantage of the E-Coating is protection, it is also an electrical insulator - - - in many cases.  There are Epoxies that contain metal particles which make the E-Coating conductive. BUT with a resistance.  I have done E-Coatings with silver in the Epoxy that was used on the ISS.

The SURFACE of a material can increase or decrease the heat radiation.  A textured surface, such as bead blasting or chemical etching of an aluminum increases the radiation surface, there by increasing it above that of a non-textured surface.

What one hand giveth, the other hand taketh away.  A coated surface decreases (insulates) the heat radiation, texture that surface and it regains some of the loss of radiation (that goes back to the 0 & 1 rating system).  But, it can never be 1.  

The only coating that I know of to increase radiated heat was a Plasma Spraying process of metal particles.  It did this by texturizing the surface and increasing the area.

I wonder, could we have worked together or at least talked?  I was in these fields between 1978 and 2002.

I am in NJ.

Barry

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[Randy]

On the topic of colors and heat...

I was looking for an enclosure of some type in which to install
electronic equipment for an outdoor application. I searched amazon for
a silver toolbox and could only find units of a suitable size in
black. I ordered one for the project but wanted to see what the
internal temperature rise would be in direct sunlight before using it
and, as you might guess, it was considerable.

The black box was a no-go for the project and I hadn't tested it prior
to the end of the return window so it was going to be a keeper for
some other purpose. The day I realized the return window had expired,
while discovering this on amazon, amazingly, there are now silver
toolboxes in the same form factor as the previously purchased black
one. I ordered one of those.

Temperature data was collected with a pair of temperature data
loggers, one placed inside the box and elevated from the metal and the
other placed close to the box and out of direct sunlight.

If interested, take a look at the attached spreadsheet to see the
difference. The data from the black box was pretty much as-expected
but the silver box data was quite a surprise. There's a larger data
set for the silver box than the black, it was left running several
days longer.


Here are amazon links to the items used.

Black toolbox
https://www.amazon.com/TUFFIOM-Aluminum-Diamond-Trailer-Toolboxes/dp/B0BP1SJ39T

Silver toolbox
https://www.amazon.com/TUFFIOM-Aluminum-Diamond-Trailer-Toolboxes/dp/B08DCQMPKX

Data loggers
https://www.amazon.com/Lascar-Electronics-EL-USB-LITE-Temperature-readings/dp/9792284044

Randy

On Tue, Feb 24, 2026 at 8:24 AM 'David Tanks' via Valley Hams
<valle...@googlegroups.com> wrote:
>
> Don't let the title of this email fool you! The discussion of the title
> has evolved into the characteristics of various colors and their
> properties of reflecting or absorbing heat. How this email came
> about is a mystery, but thought you all might find it an interesting
> read.
>
> David AD4TJ
>


>
>

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[RileyC]

Thanks for the idea. I was looking at these, but the internal dimensions don't quite work for what I need.

https://www.amazon.com/dp/B0CGYHCKRQ

Do you want to talk about swapping your black tool box for a silver? My project is outdoors in the shade.

Riley

To view this discussion visit https://groups.google.com/d/msgid/valleyhams/CACpHtNUNoL0yqW8LO4WPb5BvuTKHX-9gv8W-39ySwJEXjPsmDQ%40mail.gmail.com.

[Bob McCracken]

Build yourself a Stevenson Screen and put your stuff in it 

Bob N4JGO

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[n3...@comcast.net]

I'll add my 2 cents here.
A few years ago, I built a GPS speedometer and location logger for my car. It is in a black plastic box sitting on the dashboard. It got hot enough to warp the plastic. I looked into highly reflective spray paint and bought a can. Before I got around to using it, I found highly reflective 2" wide tape and applied it to many sides of the box. I have not monitored the temperature as much as the people here, but it has continued to work since then.
Right now, I can't find the brands of the paint or tape. I'm pretty sure I bought them at Amazon after searching for "highly reflective".
John, N3JN

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