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VAL Digest V1 #11



VAL Digest         Friday, September 19 2003         Volume 01 : Number 011




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Topics in Today's Digest:

[VAL] Waste tank valves - lubricate?
Re: [VAL] Battery question
Re: [VAL] Battery question
Re: [VAL] Silicone remover
Re: [VAL] Battery question

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Date: Thu, 18 Sep 2003 01:52:33 EDT
From: NuDog@xxxxxxxxxx.com
Subject: [VAL] Waste tank valves - lubricate?

Noticed valves are getting stiff in pushing them closed - opening is fine - 
some way to lubricate them to prevent problems?
Thanks Jim 

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Date: Thu, 18 Sep 2003 10:34:32 -0500
From: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@xxxxxxxxxx.net>
Subject: Re: [VAL] Battery question

You should be running the refrigerator on propane when you don't have
120 volts. Carrying energy in propane is far easier than carrying it in
sulfuric acid.

The charger may not draw current through the full sinewave of the
generator, but only at the peaks. The generator may not hold up voltage
well with that kind of a load. I know a generator my dad and I wound
about 1957 didn't work well with electronic loads for that same reason.
The Honda has a 12 volt output also that might charge the battery
directly and maybe better, but then it would be going through the charge
controller. And while the initial charging from the constant voltage
source will be fast, the last half the charge, the tapering will be
slooooow. The Inteli adjusts the voltage to hasten the charge.

A storage battery as commonly used is made up of cells. Each cell
provides 2 volts. A 6 volt battery has 3 large cells. Two 6 volt
batteries in series have 6 cell, giving 12 volts. A 12 volt battery has
6 cells all wired internally in series. The cells in a 6 volt battery
are at least twice as large as the cells in a similar sized 12 volt
battery (size of the box). Current capacity is proportional to the area
of the plates in each cell. The bigger the cell the more room for
plates. Because of cell dividers taking up space, the total energy
(watts = volts times ampere hours) in a given volume of 12 volt
batteries is a little smaller (few percent) than in a given volume of 6
volt batteries. Hence the slight advantage for using the 6 volt
batteries (in pairs for 12 volts) out in the boonies. That is true IF
and only IF the battery maker actually fills the cells with plates. That
is not necessarily true. Some sleazy battery makers will put a small
area set of plates in a big case to make it look big but be cheap.

Gerald J.
- -- 
Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.

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Date: Thu, 18 Sep 2003 20:35:03 -0700
From: Joann Wheatley <jwheatle@xxxxxxxxxx.edu>
Subject: Re: [VAL] Battery question

Does a solvent exist for Silicon Sealer? I have tried one of the Orange 
(citrus) products; denatured alcohol, kerosene, acetone, mineral 
spirits (paint thinner), energine, Shout, Def adhesive remover, Gorilla 
adhesive remover, WD40, and no luck.
Jo Ann

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Date: Thu, 18 Sep 2003 22:18:03 -0500
From: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@xxxxxxxxxx.net>
Subject: Re: [VAL] Silicone remover

McMaster-Carr shows a Silicone remover in their catalog.
www.mcmaster.com their catalog number 8460T3 for  10 oz. Aerosol. $8.39.
Probably about $3 shipping. Also in 16 oz. bottle for $25.60 and 1
gallon pail for $79.00.

Silicone is hard to remove. That's part of its claim to fame.

Gerald J.
- -- 
Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.

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Date: Thu, 18 Sep 2003 22:27:49 -0600
From: Rob Davis <rob-iod@xxxxxxxxxx.net>
Subject: Re: [VAL] Battery question

 Joann,

Permatex Gasket Remover works well, aerosol can, available at auto parts
stores.
Buy plenty of popsicle sticks for scraping and rinse with water.

Rob Davis
'64 GlobeTrotter
WBCCI #1824, VAC

Joann Wheatley wrote:

  Does a solvent exist for Silicon Sealer?

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End of VAL Digest V1 #11
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