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

sci.electronics.repair
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Today's topics:

==============================================================================
TOPIC: Exploding Duracell ProCell alkaline battery
http://groups.google.com/group/sci.electronics.repair/t/176056a86108c6a8?hl=en
==============================================================================

== 1 of 3 ==
Date: Mon, Jan 24 2011 11:47 pm
From: Jeff Liebermann

Compliments of friend, we mow have a good example of what happens
when one shorts the terminals of a 9V Duracell ProCell alkaline
battery.

<http://802.11junk.com/jeffl/pics/Duracell/Duracell-01.jpg>
<http://802.11junk.com/jeffl/pics/Duracell/Duracell-02.jpg>
<http://802.11junk.com/jeffl/pics/Duracell/Duracell-03.jpg>

He mentioned that the battery sounded like a small firecracker when
it exploded. The white debris scattered around the desk is probably
the paper battery plate spacer material.

--
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

== 2 of 3 ==
Date: Tues, Jan 25 2011 4:33 am
From: Jeffrey Angus

On 1/25/2011 1:47 AM, Jeff Liebermann wrote:
> Compliments of friend, we mow have a good example of what happens
> when one shorts the terminals of a 9V Duracell ProCell alkaline
> battery.

That's interesting, they make 9 volts with 6 cylindrical cells.
I remember taking 9V batteries apart in the '60s and they were
a flat stack of rectangular cells

Jeff

== 3 of 3 ==
Date: Tues, Jan 25 2011 5:09 am
From: Bob Villa

On Jan 25, 6:33 am, Jeffrey Angus <jan...@suddenlink.net> wrote:
> On 1/25/2011 1:47 AM, Jeff Liebermann wrote:
>
> > Compliments of friend, we mow have a good example of what happens
> > when one shorts the terminals of a 9V Duracell ProCell alkaline
> > battery.
>
> That's interesting, they make 9 volts with 6 cylindrical cells.
> I remember taking 9V batteries apart in the '60s and they were
> a flat stack of rectangular cells
>
> Jeff

Once I thought it was safe to put 2 9 volts together...they started
smoking and crackling in my pocket!

==============================================================================
TOPIC: Hello,I'm electronics lover
http://groups.google.com/group/sci.electronics.repair/t/819a19e468e60299?hl=en
==============================================================================

== 1 of 2 ==
Date: Tues, Jan 25 2011 2:24 am
From: electro siraj

Please send me about all electronic news

== 2 of 2 ==
Date: Tues, Jan 25 2011 4:08 am
From: "William Sommerwerck"

Electronics lover, eh? Does that mean you're hot for the False Maria?

==============================================================================
TOPIC: Here's a video of me at Michael Terrell's house
http://groups.google.com/group/sci.electronics.repair/t/6793a6379a1a5037?hl=en
==============================================================================

== 1 of 1 ==
Date: Mon, Jan 24 2011 7:42 pm
From: Michael Gross

Michael A. Terrell wrote:
> Jeff Liebermann wrote:
>> On Mon, 24 Jan 2011 06:15:22 +0000, Michael Gross
>> <pigwiggler@yahoo.com> wrote:
>>
>>> He didn't believe me when I told him how much I hate Justin Bieber.
>>> http://www.youtube.com/watch?v=7uYP0nNVODw
>>> Maybe now he'll believe me.
>> It took the guy two minutes to partially trash the stereo and he never
>> even got to the electronics[1]. Disgraceful. He'll never qualify as
>> an electronics recycler, who can violently disassemble a similar
>> stereo in less than 30 seconds. His problem is too small a hammer and
>> bad technique. A 6 lb sledge hammer is about right. It has a wide
>> face and plenty of mass. The trick is to hit the corners of the box,
>> not the face. That will shear off any plastic mounting fasteners,
>> causing the box to fall apart. Some practice is helpful.
>>
>> [1] scrap dealers pay considerably more for electronic boards, without
>> the plastic and metal attached.
>
>
> Don't feed the AIOE troll.
>
>

I'm also not sexually gratified listening to Justin Bieber like you.

==============================================================================
TOPIC: Yamaha PF 1000 piano , 2002
http://groups.google.com/group/sci.electronics.repair/t/2fdc9f41e99e9293?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 25 2011 3:56 am
From: "N_Cook"

Back together, no screws left over , and working all functions as far as I
can tell. Amplifier no longer making nasty noises and all keys moving and
aligned properly.

==============================================================================
TOPIC: ESR meter built in seconds
http://groups.google.com/group/sci.electronics.repair/t/43a6d9df89036edc?hl=en
==============================================================================

== 1 of 5 ==
Date: Tues, Jan 25 2011 4:11 am
From: "William Sommerwerck"

> ** Connection of the scope direct to the electro cap is important.

> Otherwise, the inductive reactance of the cable from the generator
> ( at 100kHz ) to the cap becomes included in the scope display of
> ESR - and is often more than the ESR of a good cap.

Thanks for the clarification. I suspected something like that, but didn't
consider the cable's self-inductance would be significant at 100kHz.

== 2 of 5 ==
Date: Tues, Jan 25 2011 4:14 am
From: "William Sommerwerck"

> Long as you connect the scope direct to the leads of the
> electro and know the current level from the generator --
> actual ESR values can be found.

In other words... If the driving frequency is high enough that the
capacitive reactance is essentially zero, then the net impedance is
essentially the ESR. Right?

== 3 of 5 ==
Date: Tues, Jan 25 2011 4:31 am
From: "Phil Allison"

"William Sommerwerck"

> In other words... If the driving frequency is high enough that the
> capacitive reactance is essentially zero, then the net impedance is
> essentially the ESR. Right?

** Errr - yep.

But it ain't that simple.

One has to examine the actual impedance curves for typical electros to see
what the game is - the curve is like no other kind of cap.

Think of Q factors of circa 0.05 and ESRs that way exceed the calculated
impedance at 100kHz.

..... Phil

== 4 of 5 ==
Date: Tues, Jan 25 2011 7:46 am
From: George Herold

On Jan 25, 7:31 am, "Phil Allison" <phi...@tpg.com.au> wrote:
> "William Sommerwerck"
>
> > In other words... If the driving frequency is high enough that the
> > capacitive reactance is essentially zero, then the net impedance is
> > essentially the ESR. Right?
>
> ** Errr - yep.
>
> But it ain't that simple.
>
> One has to examine the actual impedance curves for typical electros to see
> what the game is - the curve is like no other kind of cap.
>
> Think of Q factors of circa 0.05 and ESRs that way exceed the calculated
> impedance at 100kHz.
>
> ..... Phil

Nice tip thanks Phil. The 100uF electro's I have came out with ~0.15
ohms of ESR, using your method.
I've never seen an impedance curve for an electro cap. Do you have a
link or know which manufacturer's website I might check?

As a 'silly' rule of thumb it seems that most caps I run across have a
minimum impedance of ~0.1 ohms. (Ignoring the 'resonant' dips that
you sometimes see in the impedance plot.)

George H.

== 5 of 5 ==
Date: Tues, Jan 25 2011 8:35 am
From: baron

stratus46@yahoo.com Inscribed thus:

>> A 0.1uF ceramic has an impedance of 16 ohms at 100KHz - while a
>> typical 100uF electro has an impedance of 0.16 ohms at 100kHz. That
>> is 100 times less !!!

> Can't argue with facts.

Since Phil is comparing impedance values and not component values,
I guess Phil is right !

--
Best Regards:
Baron.

==============================================================================
TOPIC: Here you go
http://groups.google.com/group/sci.electronics.repair/t/d6c5cc4ba36ddd32?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 25 2011 5:30 am
From: LSMFT

Electronic gizmos for dummies.

--
LSMFT

Those who would give up Essential Liberty
to purchase a little Temporary Safety,
deserve neither Liberty nor Safety.

==============================================================================
TOPIC: Pet hates ?
http://groups.google.com/group/sci.electronics.repair/t/e7925b5c2233e9ec?hl=en
==============================================================================

== 1 of 5 ==
Date: Tues, Jan 25 2011 5:37 am
From: "Mark Zacharias"

"Jeff Liebermann" <jeffl@cruzio.com> wrote in message
news:r7crj65pnha9qvmoipoj1g4sjk1l7esdl5@4ax.com...
> On Mon, 24 Jan 2011 13:49:04 +0000 (UTC), "Geoffrey S. Mendelson"
> <gsm@mendelson.com> wrote:
>
>>Jeff Liebermann wrote:

>snip
> Incidentally, the reason I didn't want to run wires any more is that I
> was taking statins to reduce cholesterol for the last 8 years. The
> side effect was ever increasing back aches. They were tolerable for
> the first 5 years, but continued to get worse until I was unable to do
> many things. I stopped taking statins about a year ago, and had to
> wait 6 months for the back aches to mostly go away. I'm now trying to
> get back into shape so I can again crawl around under houses running
> wires. Meanwhile, it's a good excuse to not get dirty.
>
> --
> 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

Ooh, Jeff. Get that liver looked at. My brother just died of liver cancer.
His symptom for at least a couple years prior - worsening back pain.

Mark Z.

== 2 of 5 ==
Date: Tues, Jan 25 2011 6:04 am
From: Jeffrey Angus

On 1/25/2011 7:37 AM, Mark Zacharias wrote:
> "Jeff Liebermann" <jeffl@cruzio.com> wrote in message
>> Incidentally, the reason I didn't want to run wires any more is that I
>> was taking statins to reduce cholesterol for the last 8 years. The
>> side effect was ever increasing back aches. They were tolerable for
>> the first 5 years, but continued to get worse until I was unable to do
>> many things. I stopped taking statins about a year ago, and had to
>> wait 6 months for the back aches to mostly go away. I'm now trying to
>> get back into shape so I can again crawl around under houses running
>> wires. Meanwhile, it's a good excuse to not get dirty.
>
> Ooh, Jeff. Get that liver looked at. My brother just died of liver
> cancer. His symptom for at least a couple years prior - worsening back
> pain.
>
> Mark Z.

Don't you DARE drop dead on me, I ain't got the room to take all
your stuff.

Jeff

== 3 of 5 ==
Date: Tues, Jan 25 2011 6:56 am
From: "Michael A. Terrell"

Jeffrey Angus wrote:
>
> On 1/25/2011 7:37 AM, Mark Zacharias wrote:
> > "Jeff Liebermann" <jeffl@cruzio.com> wrote in message
> >> Incidentally, the reason I didn't want to run wires any more is that I
> >> was taking statins to reduce cholesterol for the last 8 years. The
> >> side effect was ever increasing back aches. They were tolerable for
> >> the first 5 years, but continued to get worse until I was unable to do
> >> many things. I stopped taking statins about a year ago, and had to
> >> wait 6 months for the back aches to mostly go away. I'm now trying to
> >> get back into shape so I can again crawl around under houses running
> >> wires. Meanwhile, it's a good excuse to not get dirty.
> >
> > Ooh, Jeff. Get that liver looked at. My brother just died of liver
> > cancer. His symptom for at least a couple years prior - worsening back
> > pain.
> >
> > Mark Z.
>
> Don't you DARE drop dead on me, I ain't got the room to take all
> your stuff.

You better make room for all MY stuff! About four tractor trailer
loads. :(

--
You can't fix stupid. You can't even put a band-aid on it, because it's
Teflon coated.

== 4 of 5 ==
Date: Tues, Jan 25 2011 8:57 am
From: Jeff Liebermann

On Tue, 25 Jan 2011 07:37:47 -0600, "Mark Zacharias"
<mark_zacharias@sbcglobal.net> wrote:

>Ooh, Jeff. Get that liver looked at. My brother just died of liver cancer.
>His symptom for at least a couple years prior - worsening back pain.
>Mark Z.

Thanks. No back pains now, after I stopped taking statins. Not to
worry. I've been running hepatic function blood tests since I started
taking statins. The bad news is that statins seems to have done some
permanent muscle damage in my back and arms. Also, liver cancer is a
potential problem for me as I had prostate cancer in 2006, which tends
to spread to adjacent organs. I'm also watching that with irregular
PSA tests. Still, this is all a good excuse for not running wires
under floors and above ceilings.

None of this worries me as I already know how I'll meet my end. It
will be in a supermarket parking lot, run over by some hurried shopper
going diagonally across the parking spaces, thinking that all the
rules of the road are suspended in the parking lot. I've come closer
to meeting my end in such parking lots than from any medical or
military condition.

--
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

== 5 of 5 ==
Date: Tues, Jan 25 2011 9:07 am
From: Jeff Liebermann

On Tue, 25 Jan 2011 08:04:30 -0600, Jeffrey Angus
<jangus@suddenlink.net> wrote:

>Don't you DARE drop dead on me, I ain't got the room to take all
>your stuff.

Relax. The instructions in my will are to burn everything to the
ground in a giant funeral pyre. That makes the final distribution of
property rather simple. If there's something you want or need, please
ask before my demise so that I can inform the appropriate tax agency.
The good news is that the first $12,000 is tax free. The bad news is
that the various tax agencies are using eBay prices for appraisals and
don't care if it's working or broken. My guess is that I have a few
more years to live, so your request might be a bit premature.

--
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

==============================================================================
TOPIC: Bitch strangles and burns dog after chewing on her Bible
http://groups.google.com/group/sci.electronics.repair/t/ee1b48005705c76b?hl=en
==============================================================================

== 1 of 3 ==
Date: Mon, Jan 24 2011 9:53 pm
From: "Harvey Daye, Jr"

http://www.cbsnews.com/stories/2011/01/24/national/main7279444.shtml

(AP) COLUMBIA, S.C. - A Spartanburg County woman has been charged with
felony animal cruelty, accused of hanging her nephew's pit bull with an
electrical cord and burning its body after the dog chewed on her Bible,
authorities said Monday.

When questioned by police and animal control officers, Miriam Smith told
them the female dog named "Diamond" was a "devil dog" and she feared it
might harm neighborhood children, according to an incident report from
the county's Environmental Enforcement Department.

Smith, 65, was arrested Sunday and remains in the Spartanburg County
jail. Bond has not been set. Officials said she doesn't have an attorney
yet and there was no phone number listed for her Pacolet Mills home.

She faces 180 days to five years in prison if convicted.

Authorities said the 1-year-old dog was kept outside on a chain and
chewed the Bible that had been left on Smith's porch. The dog's remains
were found under a pile of dried, cut grass. Part of the orange cord was
still around the dog's neck and a smell of kerosene still hung in the
air, the animal control officer wrote in her report.

The dog was killed about two weeks ago when Smith's nephew was forced to
spend several days away from home because of winter weather in the area,
authorities said.

Smith is the first person is Spartanburg County to face a felony charge
under South Carolina's tougher animal cruelty law, said Jaime Nelson,
director of the county's Environmental Enforcement Department.

Smith's mental state will likely affect what kind of penalties she
faces, Nelson added. He said he was stunned by how flat the woman's
emotions sounded as she recounted on tape what happened to the dog.

"She just acted like - what's done has been done," Nelson said.

== 2 of 3 ==
Date: Tues, Jan 25 2011 6:24 am
From: Bill Gill

Why did she chew on her Bible before strangling and burning
the dog?

== 3 of 3 ==
Date: Tues, Jan 25 2011 6:51 am
From: "William Sommerwerck"

> When questioned by police and animal control officers,
> Miriam Smith told them the female dog named "Diamond"
> was a "devil dog"...

Ah, the Evil Influence of Hostess baked goods...

==============================================================================
TOPIC: Power LED keeps blinking -Sharp LC32LE700
http://groups.google.com/group/sci.electronics.repair/t/11fd87957459167d?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 25 2011 6:18 am
From: benitos

On 24 jan, 15:45, Kripton wrote:
> On 2011-01-24 19:33:17 +0100, benitos <poth...@cae.ca> said:
>
> > Hi , having this LED television that when putting power AC , the power
> > LED is always blinking .
>
> > It's not a code and cannot power on the tv.
>
> > the 5 volts standby is OK and I don't see caps that are leaking.
>
> > Any suggestion ?
>
> check all the caps with an esr meter...
> here you can choose one to build from many schematics :
>
> http://kripton2035.free.fr/esr-repository.html
>
> have a look !
> regards,
>
> --
> ---
> Kripton

All Caps seem to be OK. ESR is less than 1

==============================================================================
TOPIC: Another PbF indicator?
http://groups.google.com/group/sci.electronics.repair/t/7662e5d9f71b71bc?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 25 2011 6:32 am
From: "N_Cook"

If anyone knows the significance of 288 degree C / 8 second soldering dwell
time pcb +soldering rating in comparison to 260/10 and 270/10, I would be
interested to hear.

==============================================================================
TOPIC: Two phases or not?
http://groups.google.com/group/sci.electronics.repair/t/0a29a801d6e01e9e?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 25 2011 7:59 am
From: "Michael Kennedy"

"Michael Kennedy" <mike@com> wrote in message
news:bISdncmHWep_5qPQnZ2dnVY3goudnZ2d@giganews.com...
>
> "David Nebenzahl" <nobody@but.us.chickens> wrote in message
> news:4d3e4a7b$0$21367$822641b3@news.adtechcomputers.com...
>> On 1/24/2011 7:40 PM Michael Kennedy spake thus:
>>
>>> "David Nebenzahl" <nobody@but.us.chickens> wrote in message
>>> news:4d3a3c1e$0$31597$822641b3@news.adtechcomputers.com...
>>>
>>>> I'm posting this to try to settle an argument going on in another
>>>> newsgroup (alt.home.repair) about phases in electrical power.
>>>
>>> <SNIP> And you have started another arguement here. haha..
>>>
>>> Honestly this is a question that I have always had, and can't understand
>>> why it isnt called 2 phase. Unless there is something to the picture I
>>> am unaware of.
>>>
>>> This qustion will enevetably be debated to the end of time. It is kind
>>> of like discussing poloitcs or religion..
>>
>> Well, it really shouldn't be like that. I mean, look, we're discussing a
>> well-known, measurable phenomenon. The output of the center-tapped
>> transformer can be demonstrated to supply two separate and distinct
>> phases. Hell, hook up two 'scopes and see what they show.
>>
>> It's just that the 'lectric-heads--the lunks who install distribution
>> panels and such--won't let us *call* it "2-phase" for several dubious
>> reasons. Doesn't change the fact that it IS two-phase power. That's what
>> I'm getting at. I'm not trying to force anyone to change their
>> terminology or give up their superstitious beliefs; I know that that's
>> futile.
>>
>>
>
> Unfortunately. Maybe we should more generic terminology to describe this.
> There is a difference in the phase of the two legs off of a center tapped
> transformer. This can not be argued. Anyone who argues so can go hook up a
> couple scopes for themselves as you suggested.
>
> Maybe the confusion exsists because of the nature of two seperate phase
> (split phase) power vs 3. Correct me if I am wrong, but any device
> requiring 240V could be powered by 2 legs of a center tapped 7200V==>120V
> N 120V transformer or could be powered by a 7200V==>240V transformer with
> the same results.
>
> That said Im sure someone will tell me why my theory of why this is a
> confusion is wrong..
>
> - Mike

Hmm.. I must have not drank my coffee yet when I wrote this.. 3 phase would
operate the same way therefore making this all bunk.

==============================================================================
TOPIC: PING william sommerwerck
http://groups.google.com/group/sci.electronics.repair/t/a4d4974bad6844e0?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 25 2011 8:15 am
From: "lurk"

In tried to send this before...I don't think iot work so I'm trying again
Hi I posted a question about an emerson stereo combo cd cassette am fm
unit that looks like an old crosley.....I wanna troubleshoot the board but
can't get it out of the case..have you ever done anything with these the
model number of it if you want to google it is NR303TT thanks

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