sci.electronics.repair - 25 new messages in 12 topics - digest

sci.electronics.repair
http://groups.google.com/group/sci.electronics.repair?hl=en

sci.electronics.repair@googlegroups.com

Today's topics:

==============================================================================
TOPIC: Descrambling PDF to Text conversion (long)
http://groups.google.com/group/sci.electronics.repair/t/a688dec46bc66135?hl=en
==============================================================================

== 1 of 1 ==
Date: Sat, May 29 2010 9:20 pm
From: vjp2.at@at.BioStrategist.dot.dot.com

strings -n2 x.pdf

Is the command to debinary a pdf file in unix

- = -
Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist
http://www.panix.com/~vjp2/vasos.htm
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
[Homeland Security means private firearms not lazy obstructive guards]
[Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]

==============================================================================
TOPIC: Conformal coating breakdown.
http://groups.google.com/group/sci.electronics.repair/t/56485486962242c4?hl=en
==============================================================================

== 1 of 3 ==
Date: Sun, May 30 2010 2:14 am
From: "N_Cook"

Jeff Liebermann <jeffl@cruzio.com> wrote in message
news:8r5306p0ite891n7h22dguduphcgnavinc@4ax.com...
> On Sat, 29 May 2010 20:03:14 +0100, "N_Cook" <diverse@tcp.co.uk>
> wrote:
>
> >Supposed to be there to keep damp/condensation out but over 20 years or
so
> >does the opposite. The waxy/jelly type coating (not the epoxy potting
stuff)
> >breaks down to an oily film that is probably hygroscopic - plenty of
green
> >copper carbonate and rotted IC pins. Gets inside chips capilliary-wise
and
> >rots them internally as well. Anyone happen to know what this oily
breakdown
> >product is chemically?
>
> No surprise. *ALL* conformal coatings are somewhat penetrable by
> water (except maybe Parylene):
> <http://en.wikipedia.org/wiki/Conformal_coating>
> <http://www.conformalcoating.com> (Yech. The tech bull requires
> registration)
> <http://www.conformalcoating.co.uk>
> There are a mess of bulletins describing various failure mechanisms
> under:
> <http://www.conformalcoating.co.uk/technicalbulletins.php>
> <http://www.conformalcoating.co.uk/FAQs.php>
> However, they don't describe anything like you're experiencing. My
> guess(tm) is that you have a wax coating, not acrylic, silicon, or
> urethane. The wax has literally dissolved into mush from airborne
> solvent attack. It may also have melted due to overheating. Difficult
> to tell for sure without knowing the type of coating.
>
> I used wax in the 1970's for marine radios. It worked well enough and
> was easy to apply. The best part was that I could solder right
> through the coating. If you want to remove the wax mess, just hit it
> with a hot air gun and watch the wax drip off the board. Solvents
> will also remove it. Then, just apply a new layer of wax and it's as
> good as new.
>
> Do you have a long wave UV lamp (i.e. black light or UV LED
> flashlight)? Most PCB coatings have a phosphorescent die mixed in to
> make it easy to inspect for gaps. Light it up and see if there's a
> pattern. If you have large blank areas missing, it's a solvent
> problem.
>
> (Duz anyone know what happened to Dr. Barry L. Ornitz, who would
> usually answer such chemistry questions? The last usenet posting I
> could find was Nov 26, 2009).
>
>
>
> --
> 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

This is a previous encounter
Digisonic 502 ultrasonic metal thickness meter
The conformal coating may have been breaking down and causing an
oil film on the board which could have seeped into the IC,
74C00 on the display board had
one NAND gate o/p stuck high
Only ever used indoors

Yesterday I broke into a new old stock , stored indoors (UK that is)
Racal PIR unit to rob the RPY93 6.5 to 14 micron long-IR pyro to play around
with, for remote temp monitoring
and the pcb was covered in this waxy stuff now oily and green on some pins.
Not powered up yet

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm

== 2 of 3 ==
Date: Sun, May 30 2010 3:20 am
From: "N_Cook"

Translucent appearance, so can make out form but not detail of components
under it, same when new. There is also iron rust brown colour as well as the
green.
If it was a mixture of paraffin wax or petroleum jelly and silica gel I
could see the silica taking in water and the other breaking down to an oil.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm

== 3 of 3 ==
Date: Sun, May 30 2010 10:21 am
From: "N_Cook"

Didn't work , I'd not noticed one of the pyro TO5 size leads was corroded
through.
So much for Racal RLC1/2 , opened up a used working Racal IR771 with a RPY96
(same spectral response) and LM324 to play with, no conformal around that
one

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm

==============================================================================
TOPIC: 40Gb Western Digital hard drive
http://groups.google.com/group/sci.electronics.repair/t/d11c27dd9c7d80c0?hl=en
==============================================================================

== 1 of 3 ==
Date: Sun, May 30 2010 2:47 am
From: "Michael A. Terrell"

Jeffrey D Angus wrote:
>
> Michael A. Terrell wrote:
> > I've seen more bad power supplies in HP
> > computers than any other brand I've worked on.
>
> Well, HP bought Compaq, so I suppose it shouldn't
> surprise me then that the PSU in that box went tits
> up after about 2 years.

I bought a new Compaq computer in 1999. It didn't make it through the
warranty because of fake low ESR electrolytics on the motherboard. I
called for a warranty repair and told them it was rebooting constantly.
They told me to make sure the video cable was connected, and if that
didn't fix it, to take it to the nearest Radio Shack store. They told me
to copy my data from the computer, but if I opened the case the warranty
was void. I told them to stuff their company up their ass and bought a
new eMachines with Windows ME. That motherboard died after five years.
The power supply was still good and went into another model emachines
that needed the same odd shaped supply. I had installed a larger hard
drive before it died. That drive, with the original install of ME is now
in the fifth motherboard and works great for scanning photos and old
manuals.

--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.

== 2 of 3 ==
Date: Sun, May 30 2010 2:53 am
From: "Michael A. Terrell"

"William R. Walsh" wrote:
>
> Hi!
>
> > I get the feeling that that is reason enough to turn around and
> > run the other way, once you see the 'Bestec' name
>
> Their 230/250 watt PC power supply has no overvoltage protection
> circuit. If something goes wrong, the motherboard usually gets it. I've
> found that nearly everything else (optical drive, hard disk, etc) survives.
>
> The later 300/350 watt supplies are better and do appear to have an OVP
> circuit.
>
> I think the often-highly-questionable wiring that some people have in
> their homes only serves to accelerate the demise of these supplies. Some
> of the wiring messes I have come across while servicing computers are
> dangerous. I'm not an electrician, so I can't fix it for someone else,
> but I do strongly suggest that they have it fixed ASAP.
>
> Out of the ones I have, some of which run 24/7, I have never lost one.
>
> As to your hard drive, perhaps they had a virus that was resident in the
> MBR or a similarly difficult-to-eradicate location? Or perhaps it really
> has been damaged and is not reliable.

Sometimes you get lucky and can fix an infected drive with the
command 'fdisk /mbr'. You have to boot with an emergency startup or
diagnostics disk with a copy of fdisk. You can run the command
manually, or run it from an autoexec.bat or other .bat file.

--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.

== 3 of 3 ==
Date: Sun, May 30 2010 2:29 pm
From: mike

William R. Walsh wrote:

>
> Their 230/250 watt PC power supply has no overvoltage protection
> circuit. If something goes wrong, the motherboard usually gets it. I've
> found that nearly everything else (optical drive, hard disk, etc) survives.

Huh, they're still in business? That's a surprise...

> The later 300/350 watt supplies are better and do appear to have an OVP
> circuit.
>
> I think the often-highly-questionable wiring that some people have in
> their homes only serves to accelerate the demise of these supplies. Some
> of the wiring messes I have come across while servicing computers are
> dangerous. I'm not an electrician, so I can't fix it for someone else,
> but I do strongly suggest that they have it fixed ASAP.

Good point, a lot of people don't know they need electrical work until
after a problem has already cost them money.

> As to your hard drive, perhaps they had a virus that was resident in the
> MBR or a similarly difficult-to-eradicate location? Or perhaps it really
> has been damaged and is not reliable.
>

Hmm, I hadn't thought to do a virus scan on it, if that's what it was
I hope it's gone.
Thanks,
Mike

==============================================================================
TOPIC: DTV decoder repair, capacitor gets too hot
http://groups.google.com/group/sci.electronics.repair/t/2a64f4c6ccba41cd?hl=en
==============================================================================

== 1 of 3 ==
Date: Sun, May 30 2010 4:45 am
From: Jeroni Paul

I'm repairing a DTV decoder Saivod DT2012 (chip Cheertek and tuner LG)
that had a swollen capacitor in the power supply. 6 months ago I
already replaced this capacitor with a low ESR high quality 105 deg
replacement but it just lasted 6 months and is swollen again.

The capacitor is EC205 1000uF 16V and is the filter for 5V output in a
switching power supply. Typical design, small transformer, rectifier
diode, first capacitor, inductor and second capacitor with TNY265 as
primary controller chip. The second capacitor remains cold and checks
fine on the ESR meter. The problem is in the first capacitor, I
replaced it again with a new 105 deg type and it works but I notice
the capacitor gets very hot in just 10 minutes. All the capacitors in
the supply check fine on the ESR meter. Tried different brands of
capacitors and the ones having the smallest ESR work better but also
get very hot.

It seems to me this receiver is too exigent on the quality and ESR of
this capacitor. Do you think this is normal and I should be looking
for a really good capacitor or should I look for another problem
elsewhere? Could I do something to reduce the stress it is put on?

The waveform on this capacitor looks like a sawtooth, rises really
fast and falls slowly until half cycle, then remains constant for the
remaining half cycle. Amplitude around 0,4Vpp to 1Vpp depending on the
capacitor used.

== 2 of 3 ==
Date: Sun, May 30 2010 11:06 am
From: PlainBill47@yahoo.com

On Sun, 30 May 2010 04:45:45 -0700 (PDT), Jeroni Paul
<JERONI.PAUL@terra.es> wrote:

>I'm repairing a DTV decoder Saivod DT2012 (chip Cheertek and tuner LG)
>that had a swollen capacitor in the power supply. 6 months ago I
>already replaced this capacitor with a low ESR high quality 105 deg
>replacement but it just lasted 6 months and is swollen again.
>
>The capacitor is EC205 1000uF 16V and is the filter for 5V output in a
>switching power supply. Typical design, small transformer, rectifier
>diode, first capacitor, inductor and second capacitor with TNY265 as
>primary controller chip. The second capacitor remains cold and checks
>fine on the ESR meter. The problem is in the first capacitor, I
>replaced it again with a new 105 deg type and it works but I notice
>the capacitor gets very hot in just 10 minutes. All the capacitors in
>the supply check fine on the ESR meter. Tried different brands of
>capacitors and the ones having the smallest ESR work better but also
>get very hot.
>
>It seems to me this receiver is too exigent on the quality and ESR of
>this capacitor. Do you think this is normal and I should be looking
>for a really good capacitor or should I look for another problem
>elsewhere? Could I do something to reduce the stress it is put on?
>
>The waveform on this capacitor looks like a sawtooth, rises really
>fast and falls slowly until half cycle, then remains constant for the
>remaining half cycle. Amplitude around 0,4Vpp to 1Vpp depending on the
>capacitor used.
What brand and series of "low ESR high quality 105 deg replacement"
did you use? I would recommecd using a Panasonic FM series or
equivalent ultra-low ESR high quality ca fron Nochicon, UCC, or
Rubycon for something like this.

PlainBill

== 3 of 3 ==
Date: Sun, May 30 2010 2:36 pm
From: Grant

On Sun, 30 May 2010 11:06:28 -0700, PlainBill47@yahoo.com wrote:

>On Sun, 30 May 2010 04:45:45 -0700 (PDT), Jeroni Paul
><JERONI.PAUL@terra.es> wrote:
>
>>I'm repairing a DTV decoder Saivod DT2012 (chip Cheertek and tuner LG)
>>that had a swollen capacitor in the power supply. 6 months ago I
>>already replaced this capacitor with a low ESR high quality 105 deg
>>replacement but it just lasted 6 months and is swollen again.
>>
>>The capacitor is EC205 1000uF 16V and is the filter for 5V output in a
>>switching power supply. Typical design, small transformer, rectifier
>>diode, first capacitor, inductor and second capacitor with TNY265 as
>>primary controller chip. The second capacitor remains cold and checks
>>fine on the ESR meter. The problem is in the first capacitor, I
>>replaced it again with a new 105 deg type and it works but I notice
>>the capacitor gets very hot in just 10 minutes. All the capacitors in
>>the supply check fine on the ESR meter. Tried different brands of
>>capacitors and the ones having the smallest ESR work better but also
>>get very hot.
>>
>>It seems to me this receiver is too exigent on the quality and ESR of
>>this capacitor. Do you think this is normal and I should be looking
>>for a really good capacitor or should I look for another problem
>>elsewhere? Could I do something to reduce the stress it is put on?
>>
>>The waveform on this capacitor looks like a sawtooth, rises really
>>fast and falls slowly until half cycle, then remains constant for the
>>remaining half cycle. Amplitude around 0,4Vpp to 1Vpp depending on the
>>capacitor used.
>What brand and series of "low ESR high quality 105 deg replacement"
>did you use? I would recommecd using a Panasonic FM series or
>equivalent ultra-low ESR high quality ca fron Nochicon, UCC, or
>Rubycon for something like this.

Up the cap's voltage rating too, if a bigger cap will fit in the box.

Grant.
--
http://bugs.id.au/

==============================================================================
TOPIC: HELP:Measuring refresh rate of PCBs
http://groups.google.com/group/sci.electronics.repair/t/786bc4e68b01617e?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, May 30 2010 5:18 am
From: "Caius"

"who where" <noone@home.net> ha scritto nel messaggio
news:phd306haattb3443pgl0atfka2difj2ch2@4ax.com...
> ?? have you tried their website? Google "gennum gs4981" and first
> hit. Then go to the "buy from distributor" or "get free sample"
> (sounds better) link at
> http://www.gennum.com/buy/sales-network

Ok, thanks.I will try with the GS4981 instead of LM1881.
But, are you sure I will solve my problem with this IC?

==============================================================================
TOPIC: making $$$$ was never so easier.....
http://groups.google.com/group/sci.electronics.repair/t/e0a0c66c343113af?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, May 30 2010 7:19 am
From: nikks

Build your own GeoString! and get paid.............

http://www.geostring.com/en/?1155577

The longer you make your GeoString...
the more free cash we'll put in your pockets!

We'll give you $10.00 free money just for starting your own GeoString.

Furthermore, we'll pay you every time you add length to your
GeoString.

It's Fun and it's Free!

click below and earn...
http://www.geostring.com/en/?1155577

==============================================================================
TOPIC: Gougeon DS
http://groups.google.com/group/sci.electronics.repair/t/80bc7a3add30b8fa?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, May 30 2010 7:29 am
From: "N_Cook"

N_Cook <diverse@tcp.co.uk> wrote in message
news:htgn1t$rkc$1@news.eternal-september.org...
> French made but not design build of a Citroen DS. Almost a googlewhack ,
but
> just on the off chance anyone here has any info. Digital spot effects
> generator c1990, chippery info has been ground off, hopefully just heavy
use
> and mechanical failings. Arret and Marche on the mains switch labelling.
>
>
>

Repaired it and pressed a button, expecting a siren or machine-gun noise. No
a sexy-voiced French girl saying oh la la!

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm

==============================================================================
TOPIC: Lead free solder
http://groups.google.com/group/sci.electronics.repair/t/23523e78c578fbf8?hl=en
==============================================================================

== 1 of 3 ==
Date: Sun, May 30 2010 9:03 am
From: klem kedidelhopper

On May 26, 8:24 pm, AZ Nomad <aznoma...@PremoveOBthisOX.COM> wrote:
> On Wed, 26 May 2010 08:47:05 -0700, Smitty Two <prestwh...@earthlink.net> wrote:
> >In article <slrnhvqfec.atf.aznoma...@ip70-176-155-130.ph.ph.cox.net>,
> > AZ Nomad <aznoma...@PremoveOBthisOX.COM> wrote:
> >> On Wed, 26 May 2010 05:25:21 -0700 (PDT), sparky <sparky...@yahoo.com> wrote:
>
> >> >Lead free solder was invented by the government since they knew it
> >> >would create more jobs (taxes) as the lead free solder caused trouble
> >> >and things were thrown out instead of being repaired.
>
> >> surface mount, package pin densities, and labor costs have guaranteed
> >> that almost nothing is repaired beyond the board level making solder type
> >> irrelevent. Even board level repairs are unlikely when the cost of
> >> repairing an item is far higher than its replacement cost.
>
> >> Leadfree solder was created not to cause electronics be discarded
> >> instead of repaired, but *because* electronics were being discarded in
> >> great numbers. Even for items that can be repaired, they frequently
> >> aren't repaired because anything older than about 18 months is
> >> obsolete in the mind of the consumer.
> >Which is why, to stray completely off-topic, we should replace income
> >tax with a national sales tax. Let the 95% of the masses who are
> >compulsive consumers foot the bill.
>
> Sorry. I didn't know I was responsding to a lunatic.

Sorry too but I think that these "lunatics" make a whole lot of sense.
I am one of the 5 percent who tries not to purchase anything new today
because unfortunately "new" has become synonomous with "crap". Nobody
wants you to repair anything anymore. Either the parts are so
ridiculously expensive or they're just not available. I stocked up on
lead solder a long time ago so that I'll be able to repair all my
older reliable "hazardous" electronics well into the future, until the
government makes all repair parts unavailable or comes into my house
with a search warrant for lead based solder that is. So for the time
being, fuck them and the horse their "stimulus package" rode in on.
BTW how is the US military handling this reliability problem? They
wouldn't usually care too much about a small item like lead
poisoning...

== 2 of 3 ==
Date: Sun, May 30 2010 10:25 am
From: "N_Cook"

klem kedidelhopper <captainvideo462009@gmail.com> wrote in message
news:ae548bae-555d-4af8-932b-a3d787ea99c0@t14g2000prm.googlegroups.com...
On May 26, 8:24 pm, AZ Nomad <aznoma...@PremoveOBthisOX.COM> wrote:
> On Wed, 26 May 2010 08:47:05 -0700, Smitty Two <prestwh...@earthlink.net>
wrote:
> >In article <slrnhvqfec.atf.aznoma...@ip70-176-155-130.ph.ph.cox.net>,
> > AZ Nomad <aznoma...@PremoveOBthisOX.COM> wrote:
> >> On Wed, 26 May 2010 05:25:21 -0700 (PDT), sparky <sparky...@yahoo.com>
wrote:
>
> >> >Lead free solder was invented by the government since they knew it
> >> >would create more jobs (taxes) as the lead free solder caused trouble
> >> >and things were thrown out instead of being repaired.
>
> >> surface mount, package pin densities, and labor costs have guaranteed
> >> that almost nothing is repaired beyond the board level making solder
type
> >> irrelevent. Even board level repairs are unlikely when the cost of
> >> repairing an item is far higher than its replacement cost.
>
> >> Leadfree solder was created not to cause electronics be discarded
> >> instead of repaired, but *because* electronics were being discarded in
> >> great numbers. Even for items that can be repaired, they frequently
> >> aren't repaired because anything older than about 18 months is
> >> obsolete in the mind of the consumer.
> >Which is why, to stray completely off-topic, we should replace income
> >tax with a national sales tax. Let the 95% of the masses who are
> >compulsive consumers foot the bill.
>
> Sorry. I didn't know I was responsding to a lunatic.

oooooooo

Military,aerospace, medical have a derogation to allow continued use of
leaded solder but obtaining de-tinned components is a problem so a whole new
side-industry detinning stuff. Derogations give the game away concerning the
conspiratorial nature. Not sure if auto industry has a derogation though.

== 3 of 3 ==
Date: Sun, May 30 2010 11:13 am
From: "ian field"

"klem kedidelhopper" <captainvideo462009@gmail.com> wrote in message
news:ae548bae-555d-4af8-932b-a3d787ea99c0@t14g2000prm.googlegroups.com...
On May 26, 8:24 pm, AZ Nomad <aznoma...@PremoveOBthisOX.COM> wrote:
> On Wed, 26 May 2010 08:47:05 -0700, Smitty Two <prestwh...@earthlink.net>
> wrote:
> >In article <slrnhvqfec.atf.aznoma...@ip70-176-155-130.ph.ph.cox.net>,
> > AZ Nomad <aznoma...@PremoveOBthisOX.COM> wrote:
> >> On Wed, 26 May 2010 05:25:21 -0700 (PDT), sparky <sparky...@yahoo.com>
> >> wrote:
>
> >> >Lead free solder was invented by the government since they knew it
> >> >would create more jobs (taxes) as the lead free solder caused trouble
> >> >and things were thrown out instead of being repaired.
>
> >> surface mount, package pin densities, and labor costs have guaranteed
> >> that almost nothing is repaired beyond the board level making solder
> >> type
> >> irrelevent. Even board level repairs are unlikely when the cost of
> >> repairing an item is far higher than its replacement cost.
>
> >> Leadfree solder was created not to cause electronics be discarded
> >> instead of repaired, but *because* electronics were being discarded in
> >> great numbers. Even for items that can be repaired, they frequently
> >> aren't repaired because anything older than about 18 months is
> >> obsolete in the mind of the consumer.
> >Which is why, to stray completely off-topic, we should replace income
> >tax with a national sales tax. Let the 95% of the masses who are
> >compulsive consumers foot the bill.
>
> Sorry. I didn't know I was responsding to a lunatic.

****************

The fuckwits who introduced the legislation are well aware that equipment
made with lead free solder isn't safe, so aerospace, automotive, military
and medical are exempt.

==============================================================================
TOPIC: Allah, CREATED THE UNIVERSE FROM NOTHING
http://groups.google.com/group/sci.electronics.repair/t/4271af4695cddeed?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, May 30 2010 10:10 am
From: Jeffrey D Angus

Sjouke Burry wrote:
> ÚÈÏááå wrote:
>
> Ah! another fanatic shouting in the street

Ya know, I kind of miss the crazy old guys with the shiny
$20 suit standing on the corners yelling at cars as they
went by.

Jeff

--
"Egotism is the anesthetic that dulls the pain of stupidity."
Frank Leahy, Head coach, Notre Dame 1941-1954

http://www.stay-connect.com

==============================================================================
TOPIC: Sony blink codes question
http://groups.google.com/group/sci.electronics.repair/t/898f6b69b5088918?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, May 30 2010 10:48 am
From: "Shaun"

<stokesbr@cox.net> wrote in message
news:4be93adb-92b4-4dd7-b716-7a966dcbcb71@q8g2000vbm.googlegroups.com...
> Posted problem with set several days ago. Model KDS 60A2000. Turn on
> set, power LED blinks 4 times, then repeats. Hoping someone here knows
> what this code is. Web search not helpful for my model. Thanks.
>

It's aliens, they're trying to communicate with you. You should be proud
that they choose you!

==============================================================================
TOPIC: OT: archiving on CD/DVD
http://groups.google.com/group/sci.electronics.repair/t/7865cc1a1f8d8699?hl=en
==============================================================================

== 1 of 5 ==
Date: Sun, May 30 2010 10:51 am
From: "N_Cook"

BBC click this week did a feature
http://news.bbc.co.uk/1/hi/programmes/click_online/8711747.stm
Using apparently high spec discs is no guarantee of longevity.
Mention of what I happen to do, copy 3 yearold backups to new on a rolling
basis and keeping in 2 different sites for storage. I also check originals
at the same time for any degradation. No mention of writing at reduced speed
for archiving purposes. I happpen to always knock down from x52 to 40 for
normal burning (slightly larger pits) and then x32 for 3 yearlt archives.
French researcher shown cleaning dics radially , not circumferentially.
Shame BBC reporter did not mention this factor.
Anyone else got any tips ?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm

== 2 of 5 ==
Date: Sun, May 30 2010 10:57 am
From: Meat Plow

On Sun, 30 May 2010 18:51:44 +0100, N_Cook ǝʇoɹʍ:

> BBC click this week did a feature
> http://news.bbc.co.uk/1/hi/programmes/click_online/8711747.stm Using
> apparently high spec discs is no guarantee of longevity. Mention of what
> I happen to do, copy 3 yearold backups to new on a rolling basis and
> keeping in 2 different sites for storage. I also check originals at the
> same time for any degradation. No mention of writing at reduced speed
> for archiving purposes. I happpen to always knock down from x52 to 40
> for normal burning (slightly larger pits) and then x32 for 3 yearlt
> archives. French researcher shown cleaning dics radially , not
> circumferentially. Shame BBC reporter did not mention this factor.
> Anyone else got any tips ?

What are you archiving?

== 3 of 5 ==
Date: Sun, May 30 2010 12:19 pm
From: "hr(bob) hofmann@att.net"

On May 30, 12:51 pm, "N_Cook" <dive...@tcp.co.uk> wrote:
> BBC click this week did a featurehttp://news.bbc.co.uk/1/hi/programmes/click_online/8711747.stm
> Using apparently high spec discs is no guarantee of longevity.
> Mention of what I happen to do, copy 3 yearold backups to new on a rolling
> basis and keeping in 2 different sites for storage. I also check originals
> at the same time for any degradation. No mention of writing at reduced speed
> for archiving purposes. I happpen to always knock down from x52 to 40 for
> normal burning (slightly larger pits) and then x32 for 3 yearlt archives.
> French researcher shown cleaning dics radially , not circumferentially.
> Shame BBC reporter did not mention this factor.
> Anyone else got any tips ?
>
> --
> Diverse Devices, Southampton, England
> electronic hints and repair briefs , schematics/manuals list onhttp://diverse.4mg.com/index.htm

I bet you use a belt and suspenders too. Seriously, I think what you
are doing requires more discipline than most of us mere mortals
have.<G>

== 4 of 5 ==
Date: Sun, May 30 2010 1:00 pm
From: Sjouke Burry

N_Cook wrote:
> BBC click this week did a feature
> http://news.bbc.co.uk/1/hi/programmes/click_online/8711747.stm
> Using apparently high spec discs is no guarantee of longevity.
> Mention of what I happen to do, copy 3 yearold backups to new on a rolling
> basis and keeping in 2 different sites for storage. I also check originals
> at the same time for any degradation. No mention of writing at reduced speed
> for archiving purposes. I happpen to always knock down from x52 to 40 for
> normal burning (slightly larger pits) and then x32 for 3 yearlt archives.
> French researcher shown cleaning dics radially , not circumferentially.
> Shame BBC reporter did not mention this factor.
> Anyone else got any tips ?
>
>
> --
> Diverse Devices, Southampton, England
> electronic hints and repair briefs , schematics/manuals list on
> http://diverse.4mg.com/index.htm
>
>
>
Yep. I stopped using them. I do my backup to removable HD and usb HD.
Much less expensive, and flexible too.
Also fine for an image backup of the system disk(and fast restore).
I use Paragon(free for private use) and Ghost2003.

== 5 of 5 ==
Date: Sun, May 30 2010 2:40 pm
From: Grant

On Sun, 30 May 2010 18:51:44 +0100, "N_Cook" <diverse@tcp.co.uk> wrote:

>BBC click this week did a feature
>http://news.bbc.co.uk/1/hi/programmes/click_online/8711747.stm
>Using apparently high spec discs is no guarantee of longevity.
>Mention of what I happen to do, copy 3 yearold backups to new on a rolling
>basis and keeping in 2 different sites for storage. I also check originals
>at the same time for any degradation. No mention of writing at reduced speed
>for archiving purposes. I happpen to always knock down from x52 to 40 for
>normal burning (slightly larger pits) and then x32 for 3 yearlt archives.

I think still too fast ;) Here I use 24x for temp life (6 months) disks.

Archival is multiple copies on hard drives, migrated as I retire drives
for larger ones.

>French researcher shown cleaning dics radially , not circumferentially.

That's always been true, if you clean in circles you create scratches longer
than what the error correction can cope with.

Grant.
--
http://bugs.id.au/

==============================================================================
TOPIC: Cordless Panasonic phones
http://groups.google.com/group/sci.electronics.repair/t/703047b5418d2146?hl=en
==============================================================================

== 1 of 2 ==
Date: Sun, May 30 2010 11:28 am
From: pebe

I recently purchased a pair of Panasonic KX-TG6522E cordless phones with
answer machine. I have noticed that when I am having a conversation with
someone I can hear his voice perfectly, but when I speak I can hear a
tinny echo of my own voice delayed by about 200ms. However, my friend
at the other end of the line can hear me perfectly.

Has anyone experienced a similar fault? Is it likely to be a BT system
fault, or a fault in the Panasonic phones?

--
pebe

== 2 of 2 ==
Date: Sun, May 30 2010 12:17 pm
From: "hr(bob) hofmann@att.net"

On May 30, 1:28 pm, pebe <pebe.6486...@diybanter.com> wrote:
> I recently purchased a pair of Panasonic KX-TG6522E cordless phones with
> answer machine. I have noticed that when I am having a conversation with
> someone I can hear his voice perfectly, but when I speak I can hear a
> tinny echo of my own voice delayed by about 200ms. However, my friend
> at the other end of the line can hear me perfectly.
>
> Has anyone experienced a similar fault? Is it likely to be a BT system
> fault, or a fault in the Panasonic phones?
>
> --
> pebe

Talk a little softer and learn to live with it.

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sci.electronics.repair - 25 new messages in 12 topics - digest

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