Xref: utzoo sci.electronics:6130 rec.humor:21805
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!boulder!sunybcs!kitty!larry
From: larry@kitty.UUCP (Larry Lippman)
Newsgroups: sci.electronics,rec.humor
Subject: Re: Using "Free" telephone power
Summary: Power Your Whole House from Your Telephone Line! - :-)
Message-ID: <3149@kitty.UUCP>
Date: 6 May 89 18:38:47 GMT
References: <636@serene.UUCP> <920@snjsn1.SJ.ATE.SLB.COM> <3139@kitty.UUCP> <17996@cup.portal.com>
Distribution: usa
Organization: Recognition Research Corp., Clarence, NY
Lines: 32

In article <17996@cup.portal.com>, ISW@cup.portal.com (Isaac S Wingfield) writes:
> I'll bet that if you used a lead-acid gel cell or some
> Ni-Cads in your telephone, you could charge them all the
> time the 'phone was on hook, and have plenty of "free energy"
> during off-hook use.

	The maximum amount of current which one can draw from a telephone
line while on-hook without running the risk of telephone line trouble is
about 1 milliampere (this actually exceeds usual loop leakage specifications
by a factor of two, but I'll be generous).

	(.001 ampere) X (50 volts) X (8760 hours) = 438 watt-hours per year 

	At typical electric utility rates of 7 cents/KWH, this power is
worth about 3 cents.

	Assuming that you can save 3 cents per year, let's do the ROI
calculations for a 4 ampere-hour 48-volt battery string; this will give
you the capability of saving up all your energy for a 2-hour consumption
spree once per year.

	Using 4 Globe JC1240-1 12-volt 4-AH gel cells @ $ 34.00 will cost
you $ 136.00.  Neglecting the cost of money, changes in future energy costs
and useful life of the batteries, the batteries should pay for themselves
by the year 6522.

	:-)

<>  Larry Lippman @ Recognition Research Corp. - Uniquex Corp. - Viatran Corp.
<>  UUCP:  {allegra|ames|boulder|decvax|rutgers|watmath}!sunybcs!kitty!larry
<>  VOICE: 716/688-1231, 716/773-1700        {att|hplabs|utzoo}!/
<>  FAX:   716/741-9635, 716/773-2488      "Have you hugged your cat today?"