sci.electronics.repair@googlegroups.com

Today's topics:

* B&K 1827 frequency meter - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/40692ad1eb00cfb6?hl=en
* Detectron Geiger Counter - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/172aa0a4a231f69a?hl=en
* Ebel Watch - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/17f44c69c18332ce?hl=en
* Notebook freezing when connected to external power supply - 1 messages, 1
author
http://groups.google.com/group/sci.electronics.repair/t/5ce5b775904c6f5d?hl=en

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TOPIC: B&K 1827 frequency meter
http://groups.google.com/group/sci.electronics.repair/t/40692ad1eb00cfb6?hl=en
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== 1 of 1 ==
Date: Sat, Apr 24 2010 8:23 pm
From: klem kedidelhopper

I picked this thing up at a flea market for a buck. I put batteries in
it and it seems to power up and reads some low frequencies but I can't
seem to get it to read any RF. Does anyone have a manual they could
share with me? Thanks, Lenny

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TOPIC: Detectron Geiger Counter
http://groups.google.com/group/sci.electronics.repair/t/172aa0a4a231f69a?hl=en
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== 1 of 1 ==
Date: Sat, Apr 24 2010 8:49 pm
From: Jeff Liebermann

On Fri, 23 Apr 2010 16:00:06 +0100, "N_Cook" <diverse@tcp.co.uk>
wrote:

>Now there is no thorium loaded gas mantles around these days

Ummm... check out the gas and kerosene mantles from China. Some are
hot:
<http://www.tradevv.com/chinasuppliers/yansong_p_4e599/china-Gas-mantle.html>
Incidentally, I once sacrificed one of my radioactive thorium Coleman
lantern mantles and ran a side by side comparison of the brightness
with a current non-radioactive zirconium mantle. The radioactive
mantle was MUCH brighter.

>nor radium
>dials , what is commonly around to give an above background check that they
>are working ?

I like to use KCL (potassium salt, lite salt, or low-sodium salt). The
Potassium 40 is radioactive (450pCi/gram):
<http://802.11junk.com/jeffl/crud/salt.jpg>
<http://www.angelfire.com/electronic/cwillis/rad/nosalt.html>
It's not very hot but works well enough with a GM tube. Also lots of
fun going to the market with my 1950's GM counter. I once found some
brand of sea salt that was really hot, but it had been withdrawn or
recalled before I could return to buy some.

While at the market, try brazil nuts, acorns, and bananas. K-40 but
only when grown with massive overkill doses of fertilizer. Also try
cat litter. They all show up hot with my scintillation counter, but
are very weak with the GM tube.

If you go to the hardware store, check out the high phosphate
fertilizer. The stuff has uranium, K-40, thorium, radium, and who
know what else in it.

While at the hardware store, see if they have any tungsten stick arc
electrodes. They have some Thorium mixed in.

At home, if you have a dark colored granite counter top, you'll find
it somewhat radioactive from uranium.
<http://greenbuildingelements.com/2009/03/27/granite-showrooms-continue-selling-radioactive-granite/>
The problem isn't so much the radiation. It's the radon gas that it
produces.

Got any pottery or kitchen plates with a yellow or bright orange glaze
(Fiestaware)? If so, they're uranium oxide.

Got any old cameras or eyeglasses made between WWII and about 1980?
Most lenses have thorium mixed into the glass to increase the index of
refraction. These are really weak and will only show up on my
scintillation counter.

Got a heavy scotch tape dispenser with a sand-epoxy mix in the base?
The sand has thorium mixed in.

Got an old static eliminator for removing the static electricity from
old vinyl records? If so, it's quite hot with Polonium.

More:
<http://www.kronjaeger.com/hv-old/radio/src/index.html>
<http://www.anythingradioactive.com/radsamples.htm>
<http://www.physics.isu.edu/radinf/natural.htm> See section on food.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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TOPIC: Ebel Watch
http://groups.google.com/group/sci.electronics.repair/t/17f44c69c18332ce?hl=en
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== 1 of 1 ==
Date: Sat, Apr 24 2010 10:19 pm
From: huang xiang

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TOPIC: Notebook freezing when connected to external power supply
http://groups.google.com/group/sci.electronics.repair/t/5ce5b775904c6f5d?hl=en
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== 1 of 1 ==
Date: Sat, Apr 24 2010 10:33 pm
From: Mike De Petris

On Apr 25, 5:05 am, "hr(bob) hofm...@att.net" <hrhofm...@att.net>
wrote:
> On Apr 24, 4:46 pm, "William Sommerwerck" <grizzledgee...@comcast.net>
> wrote:
>
> > You said that this problem didn't occur with certain software -- only BIOS
> > and W7. Which suggests a software problem.
>
> > Toshiba notebooks have not generally have this problem. You could push and
> > pull the AC adapter's plug all day long, and the computer didn't mind.
>
> > I suspect the software interprets the tiny "glitch" when the plug is
> > inserted (or removed) as a power loss, or a command to switch to
> > Sleep/Standby.
>
> Does the hard drive light come on solid when it freezes, indicating it
> is in some sort of loop, or does it go out, or does it flash
> intermittently indicating it is not locked up?

it stays turned off, after lock up I see glowing these LED:
- power on
- power connected
- battery charging (if battery present)

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