[Elecraft] Non CFL desk lamp

[Jim Miller]

Sorry should have changed topic


----- Original Message ----- 
From: "Jim Miller" <JimMiller at STL-OnLine.Net>
To: <w1tf at yahoo.com>; <Elecraft at mailman.qth.net>
Sent: Monday, October 06, 2008 10:35 AM
Subject: Re: [Elecraft] CFL's


> If you want to have the use of any 110v lamp:
>
> I gave up on trying to buy all the special and separate chargers and
> everything for 12 volt.  What I do now, and it works for "everything", is
to
> use a power inverter in the car, truck, and on the bench for a "few" small
> things.  When you get your cell phone, HT, laptop, or whatever, you get a
> 110v volt recharging device.  With the inverter, you are set.  One of the
> inverters I have is probably about 15 years old and has been mobile most
of
> the time (and looks it), kicked around, abused (physically) and it still
> works great (hard to tell what color it WAS).
>
> When I go mobile to an event in radio support, I usually take an
additional
> battery and use it separate from the vehicle to run the radios until it
> needs recharging and then jump them together (through a long 18 ga wire to
> add some resistance during the initial recharging to limit recharge
current
> and protect the wiring) and start the car .  Another plus is that you can
> take a REAL 110v trouble light instead of a flashlight.
>
> If you want to put a lamp on the desk, get an inverter and use ANY 110v
lamp
> (but put in a more sensible bulb than 100w) remembering your power usage
is
> now multiplied by ~10.  100w on 110 volts ~1 amp, 100w on 12 volts ~10
amps
> from the battery.  Just get a 15w bulb or so.
>
> Yes there is "some" power loss in the inverter but it is minimal compared
to
> the load, just be reasonable with the load.
>
> That's it IMHO,
> de Jim KG0KP
>
> ----- Original Message ----- 
> From: "Ralph Tyrrell" <w1tf at yahoo.com>
> To: <Elecraft at mailman.qth.net>
> Sent: Monday, October 06, 2008 10:12 AM
> Subject: Re: [Elecraft] CFL's
>
>
> > I am the one that started this thread, altho the subject line has
changed.
> It is wonderful to have OT subjects that all can learn from.
> >
> > Thanks to all that responed. I have learned much and now have even more
> concerns about CFLs.
> >
> > On the the next step, Where can I buy (or build) an LED desk lamp that I
> can pulg into a spare APP (Anderson Power Pole) connection on my Rig
Runner.
> That will complete my emergency power setup. (Until I decide to put up
solar
> panels.)
> >
> > 73, Ty, W1TF
> >
> >
> > >     As I sit at my computer the radio desk is to my back. I
> > > heard a burst of static behind me. That was odd since no
> > > radios were on.  The only thing on at the radio desk was the
> > > desk lamp and a power supply that keeps the batteries
> > > charged. Both are plugged into a strip that switches power
> > > to them.
> > >
> > >     I went over to the radio desk and looked at my
> > > equipment, both off. Still puzzled I turned on the 2m rig,
> > > all normal. Then I turned on the K3. All normal. I turned
> > > them off again. The K1 sits by, not connected to anything at
> > > this time.
> > >
> > >     Still puzzled  I sat there wondering if something had
> > > happened to my battery bank or one of the batteries.  I have
> > > three 26AH batteries in parallel. Each battery is fused
> > > before to goes to a fused buss.
> > >
> > >     Then my nose began to notice the smell we all dread.
> > > Something electrical was over heated.  Still I did not
> > > noticed a symptom I should have noticed earlier, the desk
> > > lamp was off. I touched the top of the lamp and it was very
> > > hot.  The bulb, a 13 Watt Florissant had failed. The ceramic
> > > base was too hot to touch.
> > >
> > >     How often do Florissant bulbs fail this way?
> > >
> > >     I had the feeling that if I were not there a fire may
> > > have started.
> > >
> > >     73, Ty, W1TF, K3/100 #696, K1 #1423
> >
> >
> >
> >
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