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Build Your Own Crystal Radio
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
A good basic kit with everything you need to build a very simple crystal radio. This is not hi-tech hi-fi. Geared for ages eight and up, it is a complete kit with wonderfully straight forward instructions which walk the experimenter through hooking up tuning needle, crystal diode, and earphone, and experimenting to find useful antennas. Excellent education, recreation and discovery device all at the same time. A simple kit with hours of fun in it.
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88028 CRYSTAL RADIO KIT |
Itty Bitty Zipseal
Zipseal plastic bag of the size gnomes use to store leftovers. 1" sq, 2" sq, 2" x 3" or 3" x 4" (our each come in bags of 100 count), clear polyethylene (the 2" x 3" 27906 has a white strip across one side, 36562 does not.). Store rings, small rock samples, biology parts, and model pieces. Great for cleaning up behind your Guinea pig when you take him for a walk.
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90273 POLY BAG, 1" | |
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27906 POLY BAG, 2" X 3" (STRIP) | |
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90274 POLY BAG, 2" | |
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36562 POLY BAG, 2" X 3" | |
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34552 POLY BAG, 3" X 4" |
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A Snarl of Magnet Wire
One of those sharpie East Coast outfits pulled a fast one on this poor naive Midwestern dealer. The result is we have a pile of exotic coated copper magnet wire. The coatings and colors vary widely, as does the gauge of the wire. With a couple of exceptions there isn't enough of any one kind among the hundreds in the pile to list separately. So we are offering an assortment and you get whatever we grab. Either way you will get a terrific value, particularly if you have an exotic application and get just what you need. Even if you are just making a garden variety coil or electromagnet you will still find the prices are very good. So go ahead, profit from our misfortune. We are glad to be of service. Sigh.
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36227 MAGNET WIRE, 16 GA | |
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36228 MAGNET WIRE, 20 GA | |
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36229 MAGNET WIRE, 24 GA |
First Surface Mirrors
Optical imaging folk insist that their reflective surfaces be on top of the glass, because an optically minor “ghost” is created with back surface mirrors. These “First Surface” optical mirrors generally also have better glass and flatter surfaces than their household brethren. Delicate, with the fragile reflective surface exposed, they carry the prices that precision demands. If you are playing with lasers, photography or optical alignment, the first surface items below are what you need. Dimensions are included in the description as width x length x thickness, all in mm.
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69134 MIRROR, FS, 1.5 X 1.5 X 1 | |
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68361 MIRROR, FS, 77 X 194 X 3 | |
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68677 MIRROR, FS, 79 X 140 X 2.8 |
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Anatomical Charts
A collection of 11" x 14" top quality medical charts. They cover topics such as organs: "Eye" or "Skin", systems: "Digestive" or "Female Reproductive" and disease or conditions such as: "Cancer" and "Obesity". They are on heavy coated paper suitable for putting up in, say, a classroom where they would be excellent teaching aids. Most are overruns that are imprinted with the name of a drug at the bottom and were distributed as part of a promotion. A few have misspelling misprints. Because of varying quantities and a horrendous sorting problem, we cannot give you the luxury of picking your favorites from a long list. We also have (2) large (20" x 26") wall charts, One on hypertension and one on the male reproductive system.
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20664 ANAT CHARTS, PKG(12) | |
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20655 ANAT CHARTS, PKG(2) | |
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23059 HYPERTEN WALL CHART | |
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23062 MALE REPRO WALL CHART |
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Tinker With Transistors
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
Hundreds of experiments. Months of fun. These solderless electronic kits from Maxitronix™ are exceptional. Each comes with a plastic console, myriad pieces and parts, and an entertaining, easy–to–read instruction book that’s so big it’s called an Owner’s Manual. The 300–in–1 kit has a 13” x 9-1/2” console with a built-in speaker, earphone, LED display, meter and more. It starts with the basics about transistors, transformers, diodes, capacitors, oscillators, circuits, etc., offering (300) radio–circuit, sound–effect, digital and other projects. equires (6) “AA” batteries (not included). Anyone from age 10 to adult who likes electronics will lust after these kits!
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91934 300-IN-1 KIT |
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Teutonic Noise
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
This well-made plastic siren/whistle, a touch over 3/4" in diameter and a similar touch under 2" long, has a perforated metal disk that rotates in response to a silent blast from the perpetrator's lungs. This creates a high-pitched, loud and certainly distinctive siren-sound that picks up pitch in relation to the air velocity, sustains it as long as your wind holds out, and winds down quickly thereafter. A fine way to signal your arrival or departure. Probably not loud enough to collect the clan at the beach, but loud enough to get their attention in the classroom! The size makes it hard, but not impossible, to swallow, so please use care in teaching youngsters to sound like a miniature air raid siren.
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10345 SIREN WHISTLE |
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It's A Snap!
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
with our best selling electronics kit. Build 100 or more electronic projects from a Reflection Detector to a Simple Salt Water Alarm with Snap Circuits Jr. The Elenco kit, a Dr. Toy Winner, has a grid base and a selection of conductors, resistors, switches, integrated circuits and more, for a total of (30) color-coded snap-in parts. For ages 8 to 108, the easy-to-use components and well-designed instruction manual make this a perfect way to spend some quality time with a bright young child! AWARDS: The National Parenting Center-Seal of Approval, Dr. Toy 100 Best Children's Products, Dr Toy Best Educational Products.
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92133 SNAP CIRCUIT JR |
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The Penny Cutters
These are the so-called miracle shears from Pakistan. They were designed for use by paramedics and others needing quickly to cut wire, light sheet metal, or other tough stuff that might stand between them and their quarry. They are normally demonstrated cutting a penny in two. Which they will do. But not as a steady diet. Let's dispel a few myths. While these are Pakistani stainless, we're not talking any miracles in manufacturing. They are good for their purpose, and real handy to have in the old tool box. But their purpose isn't making pennies into 5-mil pieces, and you will twist or break them at about the same time you find out that you've done the same thing to U.S. laws! For sheet metal or wire or fishing leaders or tin cans or whatever, be our guests.
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6389 UTILITY SHEARS |
This Is A Test
Test the testers (like guarding the guardians, which can be important) here is a carbon monoxide detector test kit. It comes with a small glass tube of carbon monoxide; you put it in the bag with your CO detector and break the tube. Simple and fast.
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36048P1 CO TEST KIT | |
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36048P10 CO TEST KIT BULK SAVINGS |
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Un-Bunsen Burner
So you don't have a gas jet in the garage? You don't think Margie and Ted are old enough to handle the high temperatures of a Bunsen burner? Our alcohol lamps are the answer. They burn alcohol (available at the hardware store), and are hot enough to boil water, to soften glass tubing for bending, and to generate the chemical reactions generally called for in science projects. Lamp A is shaped like a long-necked ink well, 3-1/2" tall x 3" dia at its widest point and comes with a wick assembly and a handy little glass lid/extinguisher. Lamp B is 2-1/2" x 2-1/2" x 2-1/2" glass bowl with a wick assembly that brings the whole to a height of 4-1/2".
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36457 ALCOHOL LAMP (A) | |
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88236 ALCOHOL LAMP (B) |
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