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Member postings for jason udall

Here is a list of all the postings jason udall has made in our forums. Click on a thread name to jump to the thread.

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Thread: Anecdotes_05 ' In the dark '
18/02/2014 18:01:24
Apparently. . Steels made pre ww2 ( well nuclear)..are sort after since they don't have radio isotopes (odd sure there would be before but maybe much less)....
Thread: Chemistry question
18/02/2014 17:55:24
But given that you use the term "evolve"..my guess is that you knew that
18/02/2014 17:54:11
Depends on what your pickling...
Metals in acids react to give off hydrogen
Carbonates.. ( some fluxes) give off carbon dioxide.....
A part from water vapour
and a little mist of acid ,..thats about it
Thread: Tapping head clutch
18/02/2014 17:30:17
Depends how urgent

Cornflakes packet..seems a frequent substitute for carb gaskets and all sorts of cardboard like jobs
..
Yeah I know..
Thread: Hydraulic lathe not working.
17/02/2014 15:46:37
Does the cam stylus move?..if it moves does the pivot/arm move with it .
Basically ( sure you have tried this already) can the follower move if asked by stylus. .
17/02/2014 15:07:36
Crud stirred up in move?..filter choked..maybe
Thread: What did you do today? (2014)
17/02/2014 14:44:23
It might be a matter of confidence. .if it can be unbolted and a new "better" one made , then there is no risk of wrecking your machine....if it requires sawing bits off..well you need to know you are right....

Cautious but not devout
Thread: Anecdotes_05 ' In the dark '
17/02/2014 13:38:20
Seem to remember pitchblend also contains radium...
And granite is a known source of radon ( nasty since its a gas and really easy to get into the body)..so any mine in granite is fun.
17/02/2014 12:28:48
Many years( or atleast pre 1980)
In eprom memory chips an unexpectedly high data corruption rate was noticed. ..to track this down a batch of wafers was bonded out ( wired using very thin gold wires) for test purposes....batch A some other wafers were processed normally. .split up to be later..encased ..bonded out

Then this batch was was split in two futher groups one encased as normal in ceramic with little quartz window..and the rest encased in expoxy as most silicon chips are...
The in effect same chips were tested. .uncased..ok
Plastic case ok...
Ceramic...failing


It was all traced to radio active minerals in the clay of the ceramic...
.
Its every where. .

Edited By jason udall on 17/02/2014 12:30:01

17/02/2014 12:16:45
Bananas

.and Brazil nuts.

Thread: What did you do today? (2014)
17/02/2014 09:47:17
I am no fan of butchery of machines but frankly if its yours make it work your way..especially if you can put it back the way you found it..nice work John.
Ps (?) Does that make me a flat earther?
Thread: Anecdotes_05 ' In the dark '
16/02/2014 12:49:04
There is a phenomenon. .called triboluminescence..basically direct stress to light from materials. . ( duct tape does it)...it would be facinating to think that rocks in mines emit light possibly indicating stress in the mine walls...

Thread: Armchair Generals
15/02/2014 22:13:10
Indeed
15/02/2014 21:54:41
Bazyle..sorry .I did not mean to be rude.
I thought that that comment ( in agreement) was sufficient.
I will try to be more verbose ( can't for the life of me think whenever that has been asked of me before) in future. .
What I think of as pithly seems to come across as cryptic. .seldom the intent
15/02/2014 16:47:40
Quite
Thread: Ideas_01
15/02/2014 16:45:37
I have a "loupe" sold as the "poor mans shadow graph"...variety of scales ..modest magnification..pocket portable. ..great for when your bench instruments can't move or the object fit on the stage.
I also use a usb microscope but the pocket device is more used because of its portability. .
...
Thread: Armchair Generals
15/02/2014 16:12:27
Quite
15/02/2014 15:54:27
Ok. We have all seen some variant of the Armchair Generals term banded about.

"Fred's opinion is irrelevant beceause he never posts any work.."
Or simular

I certainly get more forum time than bench time these days..
Does that invalidate my experience/knowledge? ( be gentle guys)
One thing about an armchair general...they have at some time been a general
Thread: Anecdotes_05 ' In the dark '
15/02/2014 15:36:25
Astronauts have reported what amounts to cloud chamber effects happening in the eye. Due to the passage of cosmic rays through the eye.
The human eye can under the correct conditions "detect" single photons..though obviously more would be required to form any kind of image
Thread: Advertising for paid work
14/02/2014 21:42:32
It has oft been said of me that I should come with subtitles
<< First < Prev 44 45 46 47 48 49 50 51 52 53 54 Next > Last >>
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