In message blu125-w32eb9626acf899c8949ffce...@phx.gbl, Mark Sims writes:
Many failed electrolytic caps on PC motherboards and in PC power supplies
can be traced to a case of industrial espionage gone wrong. [...]
While this tale is true, the fact is that even without incompetence,
electrolytics
Magnus, thanks for the nice comments!
Regarding the case, yes, the form factor generally matches the TADD
enclosure, but since that's a generic box we couldn't do much about the
LEDs or the ARM switch. My thinking was that the LEDs could be mounted
off-board if necessary, and I'll update the
The code is available at http://www.tapr.org/~n8ur/PIC_Code in both
source and object form. The 03-2009 version is what is shipping on
the current TADD-2s.
The 04-2009 version is a slight update from Richard McCorkle that
changes the way the ARM and SYNC LEDs work, and also allows selecting
John,
John Ackermann N8UR skrev:
Magnus, thanks for the nice comments!
You are most welcome.
Regarding the case, yes, the form factor generally matches the TADD
enclosure, but since that's a generic box we couldn't do much about the
LEDs or the ARM switch. My thinking was that the LEDs
Tapr.org appears to be off the map this morning...
Didier KO4BB
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of John Ackermann N8UR
Sent: Saturday, May 23, 2009 6:12 AM
To: Discussion of precise time and frequency measurement
Didier skrev:
Tapr.org appears to be off the map this morning...
Works great for me.
Cheers,
Magnus
Didier KO4BB
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of John Ackermann N8UR
Sent: Saturday, May 23, 2009 6:12 AM
To:
Hi,
There is a general exemption from the hazardous goods regulations for
non-spillable batteries that are installed in equipment. Sealed Lead acids are
also exempt if in the original packaging. There have been changes recently on
the quantity of lithium in batteries aircraft. Unfortunately
Magnus Danielson said the following on 05/23/2009 07:45 AM:
Since the TADD enclosure has two DB-9 cutouts, one nice option (which
I haven't tried yet) would be to wire the LED, the 5/10 MHz jumper,
and the ARM switch connections to a DB-9 and mount that in the
enclosure, then mount the LEDs
Worked for me earlier, and again just now...
John
Didier said the following on 05/23/2009 08:13 AM:
Tapr.org appears to be off the map this morning...
Didier KO4BB
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of John
John Ackermann N8UR skrev:
Magnus Danielson said the following on 05/23/2009 07:45 AM:
Since the TADD enclosure has two DB-9 cutouts, one nice option (which
I haven't tried yet) would be to wire the LED, the 5/10 MHz jumper,
and the ARM switch connections to a DB-9 and mount that in the
I just got hit by this issue in my Dell GX270. Its the one i use for HPIB
instruments/Heather. The video output disappeared. Doing a web search i
found lots of posts on they used faulty capacitors. They didnt do a recall
as it would lead to bad customer perception of Dells quality (they had
g4...@g4fre.com skrev:
I just got hit by this issue in my Dell GX270. Its the one i use for
HPIB instruments/Heather. The video output disappeared. Doing a web
search i found lots of posts on they used faulty capacitors. They didnt
do a recall as it would lead to bad customer perception of
I just had a set of 3 paralleled electrolytics more or less explode on an
nVidia video card. Some further poking around, however, revealed that they
were damaged due to a drain-source short in the buck regulator they were
supposed to filter. The three 5V caps ended up with 12V across them. So
The heat sink on the back of my 5370B runs very hot. Can't touch it for more
than a fraction of a second. Maybe some where around 140F. I assume this is
not normal??
73
Connie
K5CM
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of
They all do that.
Didier
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of Connie Marshall
Sent: Saturday, May 23, 2009 9:53 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] more 5370B
The heat
I think the influx of these models on eBay is because many of them now get
out of maintenance contract and the businesses replace them. My GX280 has
been turned on 24/7 (on a UPS) since I got it several years ago, and so far,
nothing has exploded :) This one came out of maintenance contract last
Connie Marshall skrev:
The heat sink on the back of my 5370B runs very hot. Can't touch it for more
than a fraction of a second. Maybe some where around 140F. I assume this is
not normal??
Sounds a little too hot (C would give me better indication). Check the
regulated and unregulated
Actually, www.tapr.org is not there, tapr.org is...
Didier KO4BB
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of Didier
Sent: Saturday, May 23, 2009 7:13 AM
To: 'Discussion of precise time and frequency measurement'
Subject:
www works here, but we've had some other similar reports so there may be
some DNS strangeness. Thanks for letting me know, and I'll look into it.
John
Didier said the following on 05/23/2009 02:14 PM:
Actually, www.tapr.org is not there, tapr.org is...
Didier KO4BB
-Original
Didier,
Didier skrev:
Actually, www.tapr.org is not there, tapr.org is...
But I see them both, and DNS gives me the same IP address.
I think you need to look closer to home. It does not correlate to my
experience and I am a far bit both in geographic distance, router-hops
and ISP wise.
They are both back here now. For a while, I could not even ping
www.tapr.org, but tapr.org went fine, so it was not the browser.
Just an Internet gremlin I am sure...
I have been moving the laptop between two wireless routers this morning, but
it does not normally do that, unless I did it at
I measured one of my units. Room temp is 23.5C, hottest spot on the heat sink
is 58.5C. A rise of 35C over ambient. Your 140F temperature reading is,
unfortunately, quite normal. I have considered adding a small fan to the heat
sink. These numbers might just prompt me to get off my
I had a similar heat problem with another hp of the same vintage. i
clamped another heatsink on with some cheap 1 in c-clamps. cooled it off
pretty well.
don
Mark Sims
I measured one of my units. Room temp is 23.5C, hottest spot on the heat
sink is 58.5C. A rise of 35C over ambient. Your
Roger Roger I was thinking of doing the same thing. After noticing this
yesterday, I already have a temporary fan positioned on the heat sink. It's
not bad in the shack today, but on some days the temp approaches 89F (32C).
It was around 82F (27.7C) when I made the measurment. This will
I'm not sure if the espionage story is true. However there is a problem with
electrolytics. the modern ones have got a lot smaller and run hotter due to
incresed PSU switching frequencies. A detailed look at datasheets can be
revealing. Many electrolytics have suprisingly short lifes quoted.
That would be a lot quiter than a fan may have to give that a try.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Don Latham
Sent: Saturday, May 23, 2009 4:48 PM
To: Discussion of precise time and frequency measurement
Subject: Re:
Results from a quick test. A very quiet 12V, 150mA, 5 inch fan placed 2 inches
from the heat sink dropped that 58C spot down to 40C. Not as much as I had
expected. That hot spot is near the center of the outside fin of the heat
sink.
Those inner fins between the transistors are quite a
The capacitor espionage story is quite true and well known to just about
everybody in the computer industry. Google capacitor corporate espionage for
a start. First hit is: http://www.burtonsys.com/bad_BP6/story1.html from IEEE
Spectrum. More than one cap maker got the bad juice...
In message 980094.92979...@web27105.mail.ukl.yahoo.com, Robert Atkinson write
s:
I'm not sure if the espionage story is true.
It is:
http://www.theregister.co.uk/2003/02/06/stolen_formula_torpedos_big_brand/
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org
The word we got from our Dell National Accounts rep was that there was a run of
contaminated electrolyte affectring several capacitor manufactures. Gee, go
figure QC issues in a country still painting toys with lead based paint...
Any way, I recently purchased a pile of low ESR caps from
Tom Clifton skrev:
The word we got from our Dell National Accounts rep was that there was a run of
contaminated electrolyte affectring several capacitor manufactures. Gee, go
figure QC issues in a country still painting toys with lead based paint...
Any way, I recently purchased a pile of low
I've done the repair pulling the caps off the board leaving the leads which is
what I solder too, not petty but no need to remove the motherboard. May need to
clean up the leads if some aluminum foil is left behind. Also add hot glue for
support under and around the new capacitor.
Stanley
At 07:38 PM 5/23/2009, Tom Clifton wrote...
Turned out being a lot harder than I had anticipated as the internal
ground planes on the Dell Motherboards made the old caps dogs to
remove, and the new ones very hard to solder back in without cold
joints.
Get some Chipquik (
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