I first heard about the electrolytic problem after having lost my
third computer video card in a little over a year. At first I though
I might have a power supply problem that was blowing video cards, but
that didn't make a lot of sense, it wasn't blowing other
stuffs. Besides, the voltages
I assume that in time better grade capacitors will work their way into the
manufacturing world.
Counterfeit electronic parts have become the newest business model
in some circles. The problem is getting worse.
--
http://www.wearablesmartsensors.com/
http://www.softwaresafety.net/
A 33.31 format would buy us a century, still allow us to get
nanoseconds right, but it be computationally inconvenient and
looks messy, so people balk at it.
Anything wrong with TAI64NA?
http://cr.yp.to/libtai.html
libtai is a library for storing and manipulating dates and times.
libtai
On 5/24/09 8:32 AM, Bob Paddock bob.padd...@gmail.com wrote:
A 33.31 format would buy us a century, still allow us to get
nanoseconds right, but it be computationally inconvenient and
looks messy, so people balk at it.
Anything wrong with TAI64NA?
http://cr.yp.to/libtai.html
libtai
In message c63ec123.7f8b%james.p@jpl.nasa.gov, Lux, James P writes:
Anything wrong with TAI64NA?
http://cr.yp.to/libtai.html
It also breaks the time up into seconds, nanoseconds, and attoseconds, as
separate chunks, so math isn't trivial
I don't think this library buys you a whole lot
Also, someone I was discussing this with at work reminded me of a
common problem. We often run tests in a testbed where we need to have
the entire testbed running at some time *not the actual time*.. E.g.
If you're simulating a Mars entry,descent,landing scenario, you want
the spacecraft
I have an Ovenaire OSC 85-50 10 MHz OCXO that is a frequency reference for a
HP 5316B frequency counter. It oscillates but the output amplitude is about
20 mV.
I would like to try to repair it. It looks like it is sealed with epoxy.
Any suggestions on how to open it other than scraping the
Hi I wonder if anyone still has a datasheet/catalogue of Cathodeon products.
This firm made crystals and oscillators and filters in the 1980 and 90s in
Cambridge, England. (It is only 50 miles up the raod but I have not been
able to find anyone who still has any knowledge of the products.)
The
Hello Joe,
At one time I used methylene chloride, a clear liquid, to dissolve epoxy.
Took awhile, but the epoxy did soften up and I could easily chip it out.
I soaked the item in a large covered pickle jar for a couple of days.
The liquid and vapors of the solvent got to the epoxy nicely.
In message: c63ec123.7f8b%james.p@jpl.nasa.gov
Lux, James P james.p@jpl.nasa.gov writes:
:
:
:
: On 5/24/09 8:32 AM, Bob Paddock bob.padd...@gmail.com wrote:
:
: A 33.31 format would buy us a century, still allow us to get
: nanoseconds right, but it be computationally
I would avoid the methylene chloride. It is very prone to capillary
wicking/pumping and will definitely damage plastic cased components if gets to
them. It has been used to de-pot semiconductors.
It can pump a whole lot of itself through tiny cracks in a short period of time
particularly
Alan
The Cathodeon Company was part of Pye of Cambridge, which in turn became
part of Philips. I understand that nothing has survived of the old Pye
Group, so it may be difficult to obtain any new data.
Roy
- Original Message -
From: Alan Melia alan.me...@btinternet.com
To:
I had an earlier model 20 mhx ovenaire osc that had very low output. I
opened it up with a scalpel and found the TTL chip had failed and was only
letting a small amount of the osc signal thru. I was able to use an
external TTl (74LS20 I think) to restore it. As I recall I was unable to
readily
Thanks Roy, yes I know several peple who worlled for Pye / Philips, and the
firm I was involved in was a dealer for a while in the 80s. I have some data
but not on those units. I cant remember when Philips bought them but it was
a kiss of death !
Thanks and Best Wishes
Alan G3NYK
- Original
On 5/24/09 11:13 AM, Hal Murray hmur...@megapathdsl.net wrote:
Also, someone I was discussing this with at work reminded me of a
common problem. We often run tests in a testbed where we need to have
the entire testbed running at some time *not the actual time*.. E.g.
If you're
Magnus wrote:
Having 1-10 kW per rack is not uncommon these days, so
forced convection needs to be done
That and more. A fully loaded 42U rack of HP C-class blades runs 8 kW idle and
peaks at 24 kW.
This can be air cooled (easily) in a properly designed and commissioned
run-of-the-mill
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