Home Power #34 ¥ April / May 1993 HOME POWER
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SOLOREX a division of AMOCO OIL FULL PAGE FULL COLOUR 2 Home Power #34 • April / May 1993 HOME POWER THE HANDS-ON JOURNAL OF HOME-MADE POWER Contents From Us to YOU– 4 Greenhouse– 55 Back to the Basics– 90 Puzzles PV Greenhouse Ventilation Designs on the Sun Systems– 6 Data on Photovoltaics– 58 Happenings– 93 Solar As You Go Doktor Data Explains Sunshine Renewable Energy Events Systems– 14 Subscription Form– 59 Home & Heart– 96 Solar Pioneers in Central America Subscribe to Home Power! Solar Turntable Electric Vehicles– 20 Electric Vehicles– 62 The Wizard Speaks–98 Solar Powered Wheels Performance Testing at ‘92 TdS Techno-primative Hydrogen– 26 Things that Work!– 68 Letters to Home Power– 100 Heatin’ with Hydrogen LED Flashlight Lamps Feedback from HP Readers Tech Notes– 30 Basic Electronics–70 Q&A– 108 Using your electric meter… Dr. Klüge on Timers and FETS All manner of techie gore Wind– 32 Things that Work!– 76 Home Power's Business– 110 Why Wind??? RMS Datalogger Advertising and Sub data System Shortie– 37 Homebrew– 79 Home Power MicroAds– 111 Out of the fire and into the sun Super Simple Mag Field Meter Unclassified Ads Electric Vehicles– 40 Power Politics– 83 Writing for Home Power– 113 Electric Car Adaptors Put Solar on the White House! Share your experiences! Batteries– 44 Code Corner– 85 Index to HP Advertisers– 114 Alkaline Cell Operating Tips Inverter Grounding For All Display Advertisers Electric Motors– 48 Home Business– 87 Home Power Mercantile– 114 How Electric Motors Work Home Business Basics RE Businesses Access Think About It Cover Home Power Magazine “When you come to the fork in the Solar energy was a step-by-step POB 520 road, take it!” process for Rick and Pat Walker. Ashland, OR 97520 Yogi Berra Story on page six. 916-475-3179 Voice & FAX Photo by Therese Peffer. 707-822-8640 Computer BB Home Power #34 • April / May 1993 3 From us to YOU People Puzzles David Booth Barry Brown Joel Chinkes Karen Perez Sam Coleman Well folks, here we go again. Home Power is again at a crossroad. The time Renaldo Cortez has come for a major change in the appearance of Home Power. We know the Leøj Data first reaction of many will be, “Oh no, they’ve sold out and gone glossy.” This Jerry Fetterman decision was not made lightly. It took several weeks of round ‘n round within Chris Greacen our own crew to reach this decision. We’re not moving to offices in New York. Jim Healy We’ve not sold out to a big publishing house. The content and subscription Kathleen Jarschke-Schultze Johm Mills price WILL remain the same. We’re still in our techno-primitive household here Mark Newell on Agate Flat. We’re the same demented crew. Therese Peffer Why Change? Karen Perez The reasons are many and complicated. Getting the info out to more folks, Richard Perez newsstand sales, advertisers, and environmental impact are the biggies. Amanda Potter Shari Prange Why worry about getting out on newsstands? Many of you would not be Walt Pyle reading this if it weren’t for our being on newsstands. Many of you might not John H. Rogers have picked up Home Power without the color cover. Many people tell us how Mick Sagrillo hard the information found in Home Power is to find. Many newsstand buyers Bob-O Schultze won’t give us a chance without the “look”. Our newsstand sales have grown Tom Stockebrand 175% in the last year. This could easily triple or quadruple, with the right Pat Walker appearance. Rick Walker Why worry about advertisers? They help pay the bills and give us all a much Michael Welch John Wiles broader selection of products and services to choose from! Many of our Robert Wills advertisers have complained about their logos filling in and muddy looking photos. Some of these advertisers won’t advertise again until this problem goes Printing away (i.e. print quality improves), some potential advertisers won’t even give us Southwest Offset, Gardena, CA a try. Advertisers also want to reach as many potential customers as possible. Cover 50% recycled (40% pre- So we are again back to newsstands and appearance. consumer, 10% post-consumer), low chlorine paper. Interior is 50% This brings us around to environmental impact. I have spent many hours on the recycled paper. Soybean inks phone talking to environmentally conscience magazines, paper mills, ink used throughout. manufacturers, and environmental organizations about this issue. Many more Legal hours have been spent digesting literature from all of the above. This move will Home Power (ISSN 1050-2416) is reduce the environmental impact. This is complicated so read on! published bi-monthly for $15 per year at P.O. Box 520, Ashland,OR A very short printer primer 97520. Second class postage paid Currently the insides of Home Power are printed on an open web press. This at Ashland, OR. POSTMASTER type of press does not have a heater to help dry the ink as the newly printed send address corrections to P.O. paper comes out of the press. The amount of ink that soaks into the paper is Box 520, Ashland, OR 97520. hard to control. Newspapers use open web presses. This type of press uses Copyright ©1993 Home Power, Inc. giant 5000 pound rolls of paper. It currently takes two plus of these giant rolls All rights reserved. Contents may for our 15,000 press run. The type of paper that open webs can run are limited. not be reprinted or otherwise reproduced without written The covers are printed on a sheet fed press. This type of press does have permission. driers and produces a much finer looking print job. The limit here is the type of While Home Power Magazine paper used. Uncoated recycled papers soak up a lot more ink and the colors strives for clarity and accuracy, we assume no responsibility or liability look darker. for the usage of this information. 4 Home Power #34 • April / May 1993 From us to YOU The move we want to make is to a heat set, computer within the next year. The reason that the demand is controlled web press. This type of press does have heaters expected to increase so radically is because of the and much more control of the amount of ink that is laid increasing number of recycled paper mills. If we all continue down on the paper. It allows a much wider choice of paper. to do our bit and demand recycled paper more and more It also means much finer halftones (photographs) and much recycled paper mills will be built. cleaner type. Most magazines use heat set web presses. Inks We are also planning to move to a different type of binding. We have used only vegetable oil inks for the last couple of We are at the ragged edge of the saddle stitch (stapled) years. We will continue to use low volatile organic binding technology we have been using. The machinery compound (LVOC) inks. Even though vegetable inks are cannot gracefully handle 116 pages. The image on the more environmentally safe than “dead dinosaur” types of page appears crooked and sometimes because of this ink they still contain between 6-10% nasty stuff in the form “slipping” we have come very close to losing parts of pages. of heavy metals. So the less ink used, the better and we’re The binding we are moving to is called perfect bound. This back around to coated paper which absorbs less ink. binding has a spine. The machines that do this type of Putting the puzzle together binding can easily handle our page count and gives us It’s a pretty complicated puzzle. We want to keep everyone room to grow. happy. We want to be environmentally conscientious. We The paper puzzle want renewable energy to spread. It’s a real juggling act. Is We have made no firm decision on just what paper we will this selling out? We don’t think so and hope you won’t be moving to. We are still gathering information. We have either. learned a lot though. I’d be happy to discuss this in more detail. Just give me a The main problem with “glossy” clay coated paper is public call at 916-475-3179, but be prepared, printing & paper is perception. Clay coated paper is between 28–40% coating my version of “nerd”. by weight, that means less wood fiber is used. The coating Karen is made from calcium carbonate, starch and clay. Coated stock can have a much higher postconsumer paper content and still be strong enough to be run through the high speed rollers of the web presses without tearing. The clay coating helps strengthen the paper. Coated paper does not soak up as much ink. For the cover, we are currently looking into a 70 pound coated paper that contains 75% postconsumer fiber made by a non-chlorine mill. The bleaching of the fibers is accomplished with oxygen instead of chlorine. Chlorine bleaching forms dioxins, a nasty toxic waste This coated paper is 60% wood fiber and 40% coating. We are also researching a 50% recycled (between 15–20% postconsumer paper) super calendered paper for the interior. This paper has less of a coating and is not as shiny. This paper is 72% wood fiber and 28% coating. Clay coated paper can be recycled, but it’s not accepted everywhere—yet. This is slowly changing as more people demand recycled paper and as more recycled mills are built.