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Shealen Fairchild's latest activity
Shealen Fairchild
reacted to
DaveE's post
in the thread
I
Why was a HAM radio license required to operate early lasers?
with
Like
.
He is probably actually referring to MASERs, which are microwave amplifiers. The first laser in 1960 was a flashlamp pumped ruby laser...
Apr 27, 2024
Shealen Fairchild
reacted to
Baluncore's post
in the thread
I
Why was a HAM radio license required to operate early lasers?
with
Informative
.
The parallels are in the training and safe operating procedures. The cautious awareness, that science you cannot see, can injure and kill.
Apr 26, 2024
Shealen Fairchild
replied to the thread
I
Why was a HAM radio license required to operate early lasers?
.
i see! so it was more of a 'close-by' credential, given the use of the electromagnetic spectrum as well as early high voltage power...
Apr 26, 2024
Shealen Fairchild
replied to the thread
I
Why was a HAM radio license required to operate early lasers?
.
"those of you who ever used early lasers know you had to get a HAM radio license to run them. because you had to peak(?) the plate, dip...
Apr 26, 2024
Shealen Fairchild
reacted to
Baluncore's post
in the thread
I
Why was a HAM radio license required to operate early lasers?
with
Like
.
Was that in the USA? HAM radio in the 1960s were well-prepared to work with lasers. Early lasers required high voltage power supplies...
Apr 26, 2024
Shealen Fairchild
replied to the thread
Bug
'Contact' page broken
.
this is the footer bar i am referencing (scroll to the bottom of the page on any part of the website).
Apr 26, 2024
Shealen Fairchild
posted the thread
Bug
'Contact' page broken
in
Feedback and Announcements
.
I have tried on different machines and browsers (Edge, Chrome, Firefox, Safari); the latest upgrade of Windows 10, as well as up-to-date...
Apr 26, 2024
Shealen Fairchild
posted the thread
I
Why was a HAM radio license required to operate early lasers?
in
Other Physics Topics
.
In a lecture (at 10:24) on the birth of the laser printer, Gary Starkweather mentions that a HAM radio license was required to use early...
Apr 26, 2024
Shealen Fairchild
replied to the thread
I
Where to Find In-Depth Resources on the Physics of CDs/DVDs?
.
So says the original patent! But you are gesturing correctly - as it is implemented in contemporary standards, the reflective mechanism...
Mar 18, 2024
Shealen Fairchild
replied to the thread
I
Where to Find In-Depth Resources on the Physics of CDs/DVDs?
.
I am not asking for an analysis of the physical servo mechanism, nor the encoding circuitry. Although I would be interested to hear...
Mar 18, 2024
Shealen Fairchild
reacted to
berkeman's post
in the thread
I
Where to Find In-Depth Resources on the Physics of CDs/DVDs?
with
Care
.
@Vanadium 50 and I are often mixed up, but for the record I'm the cuter one and he's the smarter one (as much as it pains me to say...
Mar 18, 2024
Shealen Fairchild
reacted to
Vanadium 50's post
in the thread
I
Where to Find In-Depth Resources on the Physics of CDs/DVDs?
with
Like
.
Is what you need in the Red Book?
Mar 18, 2024
Shealen Fairchild
replied to the thread
I
Where to Find In-Depth Resources on the Physics of CDs/DVDs?
.
The Wikipedia is lacking on properly-developed resources, although it does have one great reference; as edited into original post...
Mar 18, 2024
Shealen Fairchild
posted the thread
I
Where to Find In-Depth Resources on the Physics of CDs/DVDs?
in
Classical Physics
.
There are many rudimentary diagrams and 'pop'-explanations of the physics underlying the apparatus used to read optical disks. I am...
Mar 18, 2024
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