---- tom ring <taring@TARING.ORG> wrote:
> Great stuff!  Thanks to you and all the others that have given me lots of work
> to do this coming weekend!
>
> It'll be fun.  Sort of.  And it's supposed to be cooler, unlike all the 90
> degree days lately.

We are hoping for 90 degree days this weekend.  High yesterday 105, forecast for today, 103.  mcneely

>
> tom
>
> On 5 Sep 2012 at 1:10, David Beierl wrote:
>
> > At 09:21 PM 9/4/2012, tom ring wrote:
> > >My fridge works fine on 120 and propane but poorly on 12 volts.  I
> > >have checked
> > >and it draws 6.3 amps on "12" volts which seems to be as expected.
> >
> > Check along the 12 V wiring for voltage drops.  Replace fuse on
> > pillar with a Littelfuse glass version that isn't prone to losing
> > contact at the retaining hole as the Euro fuses do.  Increase spring
> > tension there.
> >
> > Check using an inverter to power it on 110 V while you're driving
> > down the road.  The fridge never works as well when under way as the
> > vehicle's motion interferes to some extent with the internal
> > flows.  If no inverter, use propane.  If you stick a thermometer on
> > the cooling fins/tube with heat sink compound and cover it with putty
> > you'll be able to see fin temperature rise within moments of driving off.
> >
> > Check supply voltage at load end of fuse and current (ammeter
> > inserted in line with fuse -- I think the supply wires on that
> > fixture use screw terminals).  Leave the fuse in circuit since by its
> > nature it produces a voltage drop.  Product of voltage and amperage
> > should be at least 85 watts (rating of the heater).  If not there's a
> > poor connection somewhere and/or thicker wires needed.  Poor
> > connection may be on top of the fridge.
> >
> > If above checks are ok, pull fridge and investigate the heater pocket
> > - heater is held in with a setscrew.  Rarely they break off the
> > boiler, otherwise it's possible that corrosion may be interfering
> > with heat transfer (not too likely given that the identical AC setup seems ok).
> >
> > The easiest overall solution *may* be to simply use an inverter on
> > the road.  This minimizes voltage drops (taken as percentage of the
> > total) and lets you have a thermostat without modifying the fridge.
> >
> > Yours,
> > David
> >
> >
>
>
>
> -----------------------------------------
> Tom Ring K0TAR, ex-WA2PHW  EN34hx
> taring@taring.org
>
> What happens if a big asteroid hits the Earth?  Judging from realistic
> simulations
> involving a sledge hammer and a common laboratory frog, we can
> assume it will
> be pretty bad.
>                 - Dave Barry
> -----------------------------------------

--
David McNeely