On Feb 9, 3:06*pm, "Steve" <amso...@charter.net> wrote:

> Wouldn't surprise me to find out the AC soldering iron electrical coil was
> toasted when the voltage was applied across the two terminals.

Well, it would sure as hell surprise *me* if DC voltage damaged the
nichrome wire used in a heating coil.

Sure, there would be some initial inrush current as the heater coil
was plugged in, and there would be some counter emf for a very brief
period, and that's it, the end of XsubL.

The coil then becomes a purely resistive load.

On Feb 9, 3:06*pm, "Who Me?" <hitchhi...@dont.panic> wrote:

> OK, so we are left with two options:
> 1) Practice soldering with a bare butane flame. The pencil torches can be
> adjusted (after a short warm-up) to a flame small enough to do the
> job.......but that IS an acquired skill.

When I was working for Hughes Aircraft Company on prototype
electromechanical systems back in the late 1960's, one lab had a neat
little gadget called a "water welder".

It somehow used electricity to generate a flammable gas that came out
of the tiniest hole in the tip and I could use that flame to solder
sheet brass into compartmented prototype electronic chasses...

Mark Olson wrote:
> I was going to disagree but having thought about it I must agree.
> Under what circumstances would you need to *solder* anything on
> a bike or scooter, that couldn't wait until you reach someplace
> with mains power?

one scenario i envisioned was taking the scooter to a park or empty
field/lake/whatever with an RC vehicle- plane, boat, car, helicopter and
having to do field repairs on the RC vehicle. no mains around, obviously.

I'm not familiar with the device, but the description given of "water
welder" would imply the gas might be H2 (Hydrogen) which is indeed highly
flammable! Simple electrolysis of water (H2O) with an electric current
would produce both hydrogen and oxygen for combustion. The trick would be
in controlling the combustion process and in dealing with the resulting
byproduct water that was produced.

Bob

"." <(E-Mail Removed)> wrote in message
news:cf8505ea-19fa-4669-b651-(E-Mail Removed)...
On Feb 9, 3:06 pm, "Who Me?" <hitchhi...@dont.panic> wrote:

> OK, so we are left with two options:
> 1) Practice soldering with a bare butane flame. The pencil torches can be
> adjusted (after a short warm-up) to a flame small enough to do the
> job.......but that IS an acquired skill.

When I was working for Hughes Aircraft Company on prototype
electromechanical systems back in the late 1960's, one lab had a neat
little gadget called a "water welder".

It somehow used electricity to generate a flammable gas that came out
of the tiniest hole in the tip and I could use that flame to solder
sheet brass into compartmented prototype electronic chasses...

"." <(E-Mail Removed)> wrote

>When I was working for Hughes Aircraft Company on prototype
>electromechanical systems back in the late 1960's, one lab had a neat
>little gadget called a "water welder".

Aw hell. Now that's just downright disappointing.
I thought for sure you would tell us about the job you had when you INVENTED
fire.
;-)

On Feb 9, 5:48*pm, "Who Me?" <hitchhi...@dont.panic> wrote:

> Aw hell. *Now that's just downright disappointing.
> I thought for sure you would tell us about the job you had when you INVENTED
> fire.

You're confused. The job title of my ancestor who discovered fire was
"Cave Bear Killer"... ;-)

.. wrote:
> On Feb 9, 12:59�pm, paul c <toledobythe...@oohay.ac> wrote:
>
>> Yes, but Bob's original post asked about using a 12V/60 watt iron! �The resistance of that would be around 2.4 ohms.
>
> In that case a fully charged 8 ampere hour battery in good condition
> will power his 12 volt 60 watt soldering iron for 8/5 = 1.6 hours
> before the voltage drops below 12 volts.
>
>
>

You might be right but I always worry with non-linear devices like batteries that the linear calculations will break down well before one gets to zero. I have a three-year-old 12Ah Yuasa that has been used only for half a dozen starts since it was new and has been on a CTEK charger for one or two days a month and stored in a cool place. When I get my old Helix back together, I think I will find a 12V iron to connect to the battery, solder for half an hour, see if it starts and measure the starting current too, if I remember. Should be able to report back within a month!

"Bob" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>
>
> I wanna know if I can hot wire my scooter battery to a regular
> 12v/60w soldering iron to do local soldering repairs without going to the
> other fuel/chemical bonding methods for safety ????
>
> I know most soldering kits, you buy or build, usually require a
> standard wall socket 120v/60w soldering iron and some 4AA batteries....
>
> So I was wondering what would happen if I used a 12volt SLA 8 amp
> battery, since the wall outlet is a about 90watts and the 12volt SLA
> battery
> is also some 96 watts although it drops quickly to an easy 11 volts
> because
> of a burned cell I'm guessing....
>
> The math is there but some other factor is missing, I can't see the
> power of a 12volt SLA battery to a mere 4 AAs ...........has anybody ever
> tried this with a regular soldering iron for outdoor use???
> --
> Triad Productions-Fantalla®~EZine~ParaNovel
> National Association of Assault Research
> (http://tarbitch.balder.prohosting.com/htmlconc. html)



http://www.portasol.com/solderirons.html
I have one that's 20 years old and still works.
Paul aka Sporty


"Our groundbreaking product the Portasol 'Technic' was the first pocket
portable, butane powered, soldering iron. Standard issue in countless
service companies the Technic combines compact power and convenient
reliability. Adjustable from 10 to 60 watts equivalent power, the Technic
features 10-second refill, auto switch off, built-in ignitor and excellent
build quality. Accessories include a range of tips including a hot knife tip
for nylon rope and polymer cutting."

Steve wrote:
....
> Not to mention that Ohms is calculated completely different for an AC device
> than for a DC device. In a DC device, Ohms is a linear calculation, not so
> for AC. In DC, Ohms is RESISTANCE, for AC circuits, it is IMPEDANCE.
>
> Wouldn't surprise me to find out the AC soldering iron electrical coil was
> toasted when the voltage was applied across the two terminals.
> ...

No argument about the impedance distinction, but I presumed the scope is practical motorcycle repair matters so regarding the AC coil, is that right? (I'm prepared to sacrifice a 30W 120V AC iron to find out.)

On Mon, 09 Feb 2009 19:33:50 GMT, paul c <(E-Mail Removed)> wrote:

|>Mark Olson wrote:
|>...
|>> I was going to disagree but having thought about it I must agree.
|>> Under what circumstances would you need to *solder* anything on
|>> a bike or scooter, that couldn't wait until you reach someplace
|>> with mains power? ...
|>
|>I know Bob and if he's still living in that colourful part of town I remember, he must do his own maintenance on the street without access to household power. (Heh, heh, I'm lucky, relatively speaking, my trailer has a power outlet, only problem is in winter when I have to remember to turn off various appliances inside because of the whopping 30 amp service in the park!)


Thanx for all the input, but I came to the conclusion that I would
rather not risk "toasting" my soldering iron....one calculative post said
it would... in Message-ID: <cG2kl.3686$(E-Mail Removed)>

The fact being that it is not absolutely necessary like an emergency
(when losing an iron would mean nothing).....although it may be a practical
emergency application, but who is going to tote a soldering iron around
under the already filled under seat scooter storage space.

I can get the bike to mains in my other place, but my parking place
has no electrical conveniences....

I needed to solder some 20 gauge wiring to those fine little piezo
speaker/siren/buzzer wires.


--
Triad Productions-Fantalla®~EZine~ParaNovel
National Association of Assault Research
(http://tarbitch.balder.prohosting.com/htmlconc. html)