sci.electronics.repair - 25 new messages in 11 topics - digest

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

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Today's topics:

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TOPIC: RAC Portable Power Station, need DC adaptor spec
http://groups.google.com/group/sci.electronics.repair/t/b105b15b5ad9d933?hl=en
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== 1 of 6 ==
Date: Mon, Dec 6 2010 4:02 pm
From: "Dave Plowman (News)"

In article <Cdidndz4V7nN6WDRnZ2dnUVZ_judnZ2d@earthlink.com>,
Michael A. Terrell <mike.terrell@earthlink.net> wrote:
> You keep changing the subject.

Think you should re-read my posts. Perhaps you addressed your questions to
the wrong person.

--
*I couldn't repair your brakes, so I made your horn louder *

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

== 2 of 6 ==
Date: Tues, Dec 7 2010 1:09 am
From: "Dave Plowman (News)"

In article <FNlLo.214187$zE6.76279@en-nntp-03.dc1.easynews.com>,
Wild_Bill <wb_wildbill@XSPAMyahoo.com> wrote:
> As Dave P points out, the number of times that a small battery can
> deliver the somewhat severe duty discharge rates, is going to be a very
> limited number of times.

That was really the only point I was trying to make. The output from my
cheap one was enough to start a car on a few occasions - then not. What
the actual peak power is/was didn't much concern me.

> I didn't purchase this Schumacher power pack as an emergency car battery
> jump pack, but instead, only as a portable power supply.

Mine - despite being quite a few years old - is still fine for this, with
the battery holding its charge well. It also has a built in compressor, so
gets used for tyres. Slow, but does it.

It was remarkable value. Any cordless power tool of its age would have had
a dead battery long since.

--
* I like you. You remind me of when I was young and stupid

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

== 3 of 6 ==
Date: Tues, Dec 7 2010 1:22 am
From: "Dave Plowman (News)"

In article <4cfd8cab$0$2403$822641b3@news.adtechcomputers.com>,
David Nebenzahl <nobody@but.us.chickens> wrote:
> OK, your impeccable documentation has won me over. I withdraw my
> objection; the current claims on those jump-packs (300 amps, 400 amps)
> must be believable after all. I'm a little surprised, though.

I used to work in a TV production facility where some of the prog was made
in the 'studio' - some on location. So there was a fleet of small trucks
used just for this location work. That location might only be a few
minutes drive away. And the trucks left unused at other times. So by
nature many suffered from flat batteries just when needed.

The availability of cheap jump start packs was very appealing. Easy to
store and carry. But in practice, even with the low cost, weren't reliable
enough. So units were made up using a sack trolley and car battery with a
charger attached. So the same sort of idea only larger.

--
*Also too, never, ever use repetitive redundancies *

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

== 4 of 6 ==
Date: Tues, Dec 7 2010 7:29 am
From: "Michael A. Terrell"

"Dave Plowman (News)" wrote:
>
> In article <Cdidndz4V7nN6WDRnZ2dnUVZ_judnZ2d@earthlink.com>,
> Michael A. Terrell <mike.terrell@earthlink.net> wrote:
> > Very few car batteries are given an amp our rating in the US since
> > they are not used without a charging circuit.
>
> Great. So never used with the engine stopped?

Sure, but vehicles that are used that way on a regular basis can have
a dual battery system so the starter is on a separate battery. I first
installed some on a pair of large paddle boats at an amusement park in
the early '70s so they could run cart machines for the music while the
283 CID V8 engines were shut down.

> All car batteries in the UK
> have the amp.hour marked on them. As well as max current, etc.

What good does that do the average owner? Do they stand around bars
playing 'My dick is bigger' over car batteries?

> I have an electronic battery tester - an expensive device. This gives a
> instantaneous readout of the capacity in amp.hours. If you don't know what
> it should be it is fairly useless.

Instantaneous? Right. It gives an WAG. Battery testers have been
around for generations. Just because they add a little electronics
doesn't make them magic. Does your car battery tell you the discharge
rate to achieve the marked Ah rating?

--
For the last time: I am not a mad scientist, I'm just a very ticked off
scientist!!!

== 5 of 6 ==
Date: Tues, Dec 7 2010 7:32 am
From: "Michael A. Terrell"

"Dave Plowman (News)" wrote:
>
> In article <4cfd8cab$0$2403$822641b3@news.adtechcomputers.com>,
> David Nebenzahl <nobody@but.us.chickens> wrote:
> > OK, your impeccable documentation has won me over. I withdraw my
> > objection; the current claims on those jump-packs (300 amps, 400 amps)
> > must be believable after all. I'm a little surprised, though.
>
> I used to work in a TV production facility where some of the prog was made
> in the 'studio' - some on location. So there was a fleet of small trucks
> used just for this location work. That location might only be a few
> minutes drive away. And the trucks left unused at other times. So by
> nature many suffered from flat batteries just when needed.
>
> The availability of cheap jump start packs was very appealing. Easy to
> store and carry. But in practice, even with the low cost, weren't reliable
> enough. So units were made up using a sack trolley and car battery with a
> charger attached. So the same sort of idea only larger.

In the US you can find a combination battery charger & large lead
acid battery built to jump start vehicles. Garages use them, and I've
seen them at large malls. The charge can put out enough current to
start a typical vehicle but if no AC is available they use the battery.

--
For the last time: I am not a mad scientist, I'm just a very ticked off
scientist!!!

== 6 of 6 ==
Date: Tues, Dec 7 2010 8:13 am
From: "Dave Plowman (News)"

In article <BsWdnYXxd-xFz2PRnZ2dnUVZ_g2dnZ2d@earthlink.com>,
Michael A. Terrell <mike.terrell@earthlink.net> wrote:
> > I have an electronic battery tester - an expensive device. This gives
> > a instantaneous readout of the capacity in amp.hours. If you don't
> > know what it should be it is fairly useless.

> Instantaneous? Right. It gives an WAG. Battery testers have been
> around for generations. Just because they add a little electronics
> doesn't make them magic.

You don't half talk rubbish. Battery testers used to be large devices.
This is the size of a DVM. And gives an accurate readout of the overall
battery condition. Not just its voltage or how much current it can
deliver. It's invaluable for quick testing of a lead acid battery.

> Does your car battery tell you the discharge
> rate to achieve the marked Ah rating?

It's also a standard in the UK. 20 hour rate.

--
*Wedding dress for sale. Worn once by mistake.*

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

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== 1 of 1 ==
Date: Tues, Dec 7 2010 7:05 am
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TOPIC: *OT* Dragnet Episode
http://groups.google.com/group/sci.electronics.repair/t/7d2b25421f3aeaa0?hl=en
==============================================================================

== 1 of 9 ==
Date: Tues, Dec 7 2010 8:10 am
From: Duh_OZ

Deals with repair service scams.

As 'bait, the used a Kaye-Halbert 16'' TV and shorted out 5u4g tube.
Estimated house visit and replacement of a 5u4g tube: $4.50.

http://www.archive.org/download/dragnet/Dragnet-Big_Screen.mp3

== 2 of 9 ==
Date: Tues, Dec 7 2010 8:21 am
From: "William Sommerwerck"

> As bait, they used a Kaye-Halbert 16'' TV and shorted 5U4G.
> Estimated house visit and tube replacement: $4.50.

The viewing quality... priceless.

I'm old enough to remember when a GP charged /five dollars/ for a house
call. Five dollars was a lot of money then (ca 1955).

== 3 of 9 ==
Date: Tues, Dec 7 2010 8:25 am
From: "William Sommerwerck"

I'm listening, and unfortunately (???), Stan Freberg permanently ruined
"Dragnet".

== 4 of 9 ==
Date: Tues, Dec 7 2010 8:34 am
From: "William Sommerwerck"

Just wondering whether that new brand of rosin-core solder ever took off...

Was there really a Kaye-Halbert TV? I assume that's one of the names changed
to protect the innocent.

I wonder if all those green dots the guy applied improved the picture and/or
sound quality...

== 5 of 9 ==
Date: Tues, Dec 7 2010 9:23 am
From: PlainBill47@yawho.com

On Tue, 7 Dec 2010 08:34:32 -0800, "William Sommerwerck"
<grizzledgeezer@comcast.net> wrote:

>Just wondering whether that new brand of rosin-core solder ever took off...
>
>Was there really a Kaye-Halbert TV? I assume that's one of the names changed
>to protect the innocent.
>
>I wonder if all those green dots the guy applied improved the picture and/or
>sound quality...
>
Yes, there was. Don't you ever do any research?

http://www.tvhistory.tv/1950-59-KAYE-HALBERT.htm

PlainBill

== 6 of 9 ==
Date: Tues, Dec 7 2010 9:26 am
From: PlainBill47@yawho.com

On Tue, 7 Dec 2010 08:21:02 -0800, "William Sommerwerck"
<grizzledgeezer@comcast.net> wrote:

>> As bait, they used a Kaye-Halbert 16'' TV and shorted 5U4G.
>> Estimated house visit and tube replacement: $4.50.
>
>The viewing quality... priceless.
>
>I'm old enough to remember when a GP charged /five dollars/ for a house
>call. Five dollars was a lot of money then (ca 1955).
>
I'd place the show as somewhat earlier - probably 1952 or 53. $100
would be a good month's pay at that time.

PlainBill

== 7 of 9 ==
Date: Tues, Dec 7 2010 10:59 am
From: Jeff Liebermann

On Tue, 07 Dec 2010 10:26:14 -0700, PlainBill47@yawho.com wrote:

>On Tue, 7 Dec 2010 08:21:02 -0800, "William Sommerwerck"
><grizzledgeezer@comcast.net> wrote:
>
>>> As bait, they used a Kaye-Halbert 16'' TV and shorted 5U4G.
>>> Estimated house visit and tube replacement: $4.50.
>>
>>The viewing quality... priceless.
>>
>>I'm old enough to remember when a GP charged /five dollars/ for a house
>>call. Five dollars was a lot of money then (ca 1955).

>I'd place the show as somewhat earlier - probably 1952 or 53. $100
>would be a good month's pay at that time.
>
>PlainBill

Not really off topic. What one charges for repair service is
relevent.

Using an inflation calculator at:
<http://www.westegg.com/inflation/>
I find that $5 in 1952 is worth $41 in 2009. Not even close to what I
would charge for this type of service call today.

The best I can do for a field service call, to replace a single
component, is about $125 today. However, much of this added overhead
isn't from inflation. It's from increased tax burden, increased
overhead, insurance requirements, anticipated warranty funding,
inventory depreciation charges, and supporting my decadent and lavish
lifestyle.

Even the 5U4 has lost much of its value. Only $5.75 today:
<http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=260690412075>

As I vaguely recall, my first minimum wage job in the early 1960's was
for about $1/hr.
<http://www.dir.ca.gov/iwc/MinimumWageHistory.htm>
At the time federal minimum wage was about the same. Today, I charge
$75/hr for shop labor. As I vaguely recall, shop labor in the late
1960's (TV/Audio repair) was about $12/hr.

--
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

== 8 of 9 ==
Date: Tues, Dec 7 2010 12:35 pm
From: "William Sommerwerck"

> Yes, there was. Don't you ever do any research?
> http://www.tvhistory.tv/1950-59-KAYE-HALBERT.htm

I do. I did a browser search, and nothing at all showed up.

== 9 of 9 ==
Date: Tues, Dec 7 2010 12:37 pm
From: "William Sommerwerck"

> The best I can do for a field service call, to replace a single
> component, is about $125 today. However, much of this
> added overhead isn't from inflation. It's from increased tax
> burden, increased overhead, insurance requirements,
> anticipated warranty funding, inventory depreciation charges,
> and supporting my decadent and lavish lifestyle.

As Stan Freberg would say... a second dress for your wife.

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TOPIC: Lithium Cells Exploding
http://groups.google.com/group/sci.electronics.repair/t/181af8dd8c2e6fde?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Dec 7 2010 2:22 pm
From: "Michael Kennedy"

"Brenda Ann" <newsgroups@fullspectrumradio.org> wrote in message
news:7I2dnUT-LcyCw2DRnZ2dnVY3gomdnZ2d@giganews.com...
>
>
> "Michael Kennedy" wrote in message
> news:HcydnSwdoYmntmDRnZ2dnVY3go6dnZ2d@giganews.com...
>
>
> On that note as well.. Did anyone know there is a 1lb / 455gram limit on
> all
> parcels flying airmail to the USA? It isnt being enforced everywhere yet,
> but this is what the TSA requested / demanded.
>
>
> --------------------------------------------------------------------------------
> --------------------------------------------------------------------------------
>
> That would effectively ban all parcels over 1lb to the US, since there is
> no longer any international surface mail into or out of the US. Such a
> rule will never fly, as it would pretty much curtail any international
> small quantity commerce. Would REALLY piss off the troops, too, as it
> would pretty much mean they couldn't send anything home other than
> letters. Would also severly cripple military contractors, etc.
>
>

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