Digest for sci.electronics.repair@googlegroups.com - 18 updates in 5 topics

rickman <gnuarm@gmail.com>: Oct 19 12:45PM -0400

> On Wednesday, October 18, 2017 at 7:30:32 PM UTC-4, rickman wrote:
 
>> 40% of what exactly?
 
> Below 40% of rated capacity on a conventional lead-acid battery starts the sulphation process. Each repeat, and the plates are further damaged, and the overall capacity further compromised.
 
How do you measure the current charge state?
 
--
 
Rick C
 
Viewed the eclipse at Wintercrest Farms,
on the centerline of totality since 1998
oldschool@tubes.com: Oct 19 02:45PM -0500

On Wed, 18 Oct 2017 13:29:24 -0700 (PDT), "pfjw@aol.com" <pfjw@aol.com>
wrote:
 
>Again, you need to understand the entirety of your *SYSTEM* and what each
> piece of information means. So far, you have proven that you do not underst
>and even the most basic concepts.
 
At least I'm not an arrogant fuck like you, who replies to people asking
serious questions and trying to learn things by attacking them......
But it's obvious that you think you are the almighty God in the
electronics forums and YOUR words will always be the last words, becuase
your ego is so low that you can only feel good about yourself by
demeaning others.
 
PLONK
John-Del <ohger1s@gmail.com>: Oct 19 01:10PM -0700

> your ego is so low that you can only feel good about yourself by
> demeaning others.
 
> PLONK
 
 
 
Heheeheh,... you're like Phil sans knowledge...
Foxs Mercantile <jdangus@att.net>: Oct 19 03:20PM -0500

>> and even the most basic concepts.
 
> [ Sniveling snipped ]
 
> PLONK
 
Do you even have any idea what "Plonk" means?
 
 
--
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com
"pfjw@aol.com" <pfjw@aol.com>: Oct 20 04:25AM -0700

On Thursday, October 19, 2017 at 12:45:11 PM UTC-4, rickman wrote:
 
 
> How do you measure the current charge state?
 
Rick:
 
There are battery load testers for that. And it is a function of chemistry, available current at a specified load and time. A fully charged battery will deliver current into a given load at a given rate depending on the chemistry of the battery. And that is a function of the area of the plates and the specific design. Bigger batteries have larger plates. Batteries have differing admixtures to the lead plates, use different formulations to the acid, have inhibitors to reduce sulphation and much more. All this figures in.
 
If you are curious, 'search the net'. I handing you fish at this point - you should learn to fish.
 
Peter Wieck
Melrose Park, PA
"pfjw@aol.com" <pfjw@aol.com>: Oct 20 04:28AM -0700

> your ego is so low that you can only feel good about yourself by
> demeaning others.
 
> PLONK
 
If you were trying to learn anything - you would have been way ahead of this issue - but, no, you are looking for someone to confirm your warped view of reality. Learning is the furthest thing from your goal.
 
You will note that your first pass at any given question usually gets a straightforward answer. It is when you display invincible ignorance that things go off the rails.
 
Peter Wieck
Melrose Park, PA
"pfjw@aol.com" <pfjw@aol.com>: Oct 20 06:30AM -0700

> > Pearls, swine.
 
John/Jeff:
 
When I was growing up, Dorothy Parker was an infrequent, but memorable dinner guest at our family table. What is not well known is that Dorothy Parker and Gloria Swanson were friendly rivals - sometimes not so friendly.
 
Reported conversation between the two at a doorway:
 
Gloria to Dorothy, offering her first-passage: Age before beauty.
 
Dorothy to Gloria accepting the offer: Pearls before swine.
 
Peter Wieck
Melrose Park, PA
rickman <gnuarm@gmail.com>: Oct 20 12:21PM -0400


> Rick:
 
> There are battery load testers for that. And it is a function of chemistry, available current at a specified load and time. A fully charged battery will deliver current into a given load at a given rate depending on the chemistry of the battery. And that is a function of the area of the plates and the specific design. Bigger batteries have larger plates. Batteries have differing admixtures to the lead plates, use different formulations to the acid, have inhibitors to reduce sulphation and much more. All this figures in.
 
> If you are curious, 'search the net'. I handing you fish at this point - you should learn to fish.
 
I'm trying to engage you in a conversation. Saying things like you do is
great, but there is not a good way to know the state of your car battery
until it doesn't start the car, etc.
 
--
 
Rick C
 
Viewed the eclipse at Wintercrest Farms,
on the centerline of totality since 1998
rickman <gnuarm@gmail.com>: Oct 20 12:23PM -0400


>> PLONK
 
> If you were trying to learn anything - you would have been way ahead of this issue - but, no, you are looking for someone to confirm your warped view of reality. Learning is the furthest thing from your goal.
 
> You will note that your first pass at any given question usually gets a straightforward answer. It is when you display invincible ignorance that things go off the rails.
 
So why do you feel the need to reply with something nasty? If you don't
like his questions (I'm not suggesting they don't show the problems you
mention) why bother to respond?
 
--
 
Rick C
 
Viewed the eclipse at Wintercrest Farms,
on the centerline of totality since 1998
Jeff Layman <jmlayman@invalid.invalid>: Oct 19 06:51PM +0100

On 19/10/17 15:56, N_Cook wrote:
> theatrical suppliers or cocktail bars?
> I'll try placing in a bag of freshly oven activated silica gel perhaps,
> unless anyone has serious concerns about that.
 
I think you are mixing it up with dry *rice*, which is often mentioned
as a way of drying wet mobile phones (just google it). I've successfully
dried a wet mobile phone that way.
 
--
 
Jeff
N_Cook <diverse@tcp.co.uk>: Oct 19 07:46PM +0100

On 19/10/2017 18:51, Jeff Layman wrote:
 
> I think you are mixing it up with dry *rice*, which is often mentioned
> as a way of drying wet mobile phones (just google it). I've successfully
> dried a wet mobile phone that way.
 
Yes, the electronic engineer who emailed me that mentioning mobile
phones dropped down the bog, has a computer with a dodgey "r" on the
keyboard, on mine its a weak "a".
Ralph Mowery <rmowery28146@earthlink.net>: Oct 19 05:17PM -0400

In article <osaomd$r2k$1@dont-email.me>, jmlayman@invalid.invalid
says...
 
> I think you are mixing it up with dry *rice*, which is often mentioned
> as a way of drying wet mobile phones (just google it). I've successfully
> dried a wet mobile phone that way.
 
Instead of rice you may want to hear what this fellow that repairs cell
phones and such has to say.
 
https://www.youtube.com/watch?v=yPeITOz2_YM
Jeff Layman <jmlayman@invalid.invalid>: Oct 20 09:12AM +0100

On 19/10/17 22:17, Ralph Mowery wrote:
 
> Instead of rice you may want to hear what this fellow that repairs cell
> phones and such has to say.
 
> https://www.youtube.com/watch?v=yPeITOz2_YM
 
I got through a couple of minutes of this foul-mouthed loudmouth before
giving up. He may have a point (although he's got a vested interest as
he repairs cellphones), but you might do better to look at a link given
in one of the comments on the Youtube video at:
<https://www.gazelle.com/thehorn/wp-content/uploads/2014/05/Water-Damage-Prevention-and-Recovery.pdf>.
However, having read through how they did that "study" I'm not entirely
convinced by their conclusion! Note also that the OP's camera was not on
at the time, which, IMHO, makes a hell of a difference.
 
--
 
Jeff
Ralph Mowery <rmowery28146@earthlink.net>: Oct 20 10:15AM -0400

In article <oscb4j$1rh$1@dont-email.me>, jmlayman@invalid.invalid
says...
> However, having read through how they did that "study" I'm not entirely
> convinced by their conclusion! Note also that the OP's camera was not on
> at the time, which, IMHO, makes a hell of a difference.
 
Seems to me like they have the same conclusion that the rice is not
worth trying.
"pfjw@aol.com" <pfjw@aol.com>: Oct 20 08:01AM -0700

On Friday, October 20, 2017 at 10:15:42 AM UTC-4, Ralph Mowery wrote:
 
> Seems to me like they have the same conclusion that the rice is not
> worth trying.
 
Rice is not worth trying by itself.
 
Rice + dry heat is worth trying.
 
A gas oven does not provide DRY heat.
An Electric oven does.
 
Item in rice, at 120F for 6 hours. Remember, the alternative is landfill, so you have nothing to lose.
 
120F is no worse than the camera being in a vehicle on a hot day. Or outside in Saudi Arabia in August.
 
NOTE: The issue is dissolved solids in the water bridging traces on circuit boards, or corrupting fine gears or motors. Not the conductivity of the water itself - which is not unless such dissolved solids are there. Keep that in mind. If you can get to the circuit boards and such, saturating them in a 100% volatile material to remove the water and the salts might work. AKA: WD-40 (Running for cover). It works. After the WD-40 *THEN* the rice and heat.
 
Maybe even a rinse with distilled water, then WD-40 then rice + heat.
 
https://www.lenntech.com/applications/ultrapure/conductivity/water-conductivity.htm
 
Peter Wieck
Melrose Park, PA
amdx <nojunk@knology.net>: Oct 20 07:08AM -0500


> But, if an inexpensive, reasonably well sounding stand-alone portable radio is desired - the GE Super Radio is a fine option with not a half-bad FM section as well.
 
> Peter Wieck
> Melrose Park, PA
 
Finally some recommendations for his question.
I agree with the GE Super Radio, it is a good radio at a reasonable price.
If you want to go up in price the Sangean ATS 803A was good and then
there is the Sony 2010. 3 of them for sale on Ebay as I write.
Mikek
Phil Allison <pallison49@gmail.com>: Oct 19 08:22PM -0700


> >"using an iron transformer to produce 120V AC output. "
 
> What other kind is there ?
 
** The most common is a full bridge, mosfet output stage producing a "modified square wave" output.
 
More expensive units use a similar stage running is a class D to produce a good sine wave.
 
In both cases, the 12VDC input is stepped up to 170V ( or 340V ) DC to power the output stage.
 
 
.... Phil
rickman <gnuarm@gmail.com>: Oct 19 01:04PM -0400

> that the old bumble bee caps often had irregular stripes, where the
> paint was thicker in spots, thinner in others, and the edges were not
> always precise.
 
Don't know about resistors being hand painted as that sounds expensive. But
I know mica caps used look hand painted and in searching I found one style
that is clearly hand painted.
 
--
 
Rick C
 
Viewed the eclipse at Wintercrest Farms,
on the centerline of totality since 1998
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